Conveners
Measurements: I
- Mark Chadwick (LANL)
Measurements: II
- Keegan Kelly (LANL)
Measurements: III
- Gilles Noguere (CEA)
Measurements: IV
- Beatriz Jurado
Measurements: XIII (capture)
- Adina Olacel
Measurements: V
- Hye Young Lee (LANL)
Measurements: VI
- Frank Gunsing (CEA)
Measurements: VII
- Alberto Mengoni (CERN)
Measurements: VIII
- Darren Bleuel (LLNL)
Measurements: IX
- Maelle Kerveno
Measurements: X
- Alexandru Negret
Measurements: XI
- Valentina Semkova
Measurements: XII
- Maria Teresa Rodriguez Gonzalez
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Alberto Mengoni, The n_TOF Collaboration25/07/2022, 09:30
Based on an idea by Carlo Rubbia, the n_TOF facility has been operating during the last 20 years at CERN. n_TOF is a spallation neutron source, driven by the 20 GeV/c proton beam from the CERN PS accelerator. A massive Lead spallation target is feeding two experimental areas set at 185 meters (EAR1, horizonal with respect to the proton beam direction) and at 20 meters (EAR2, in the vertical...
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Sam Bennett, The n_TOF Collaboration25/07/2022, 09:54
The $^{35}$Cl radiative capture rate is important in a number of applications. The long-lived radionuclide $^{36}$Cl is a by-product of the activation of $^{35}$Cl present in graphite moderated reactors both in the fuel cladding and as an impurity in nuclear graphite (< 2 ppm by mass). Reliable predictions of the amount of $^{36}$Cl present in the large volume of irradiated nuclear graphite...
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Jorge Lerendegui, The n_TOF Collaboration25/07/2022, 10:06
Neutron capture cross-section measurements are of great interest for various nuclear data applications, such as the slow neutron capture (s-) process of nucleosynthesis in stars, innovative nuclear technology or medical applications. The neutron energy range of interest varies depending on the application and, hence, pulsed white neutron sources combined with the time-of-flight (TOF) technique...
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Mark Chadwick25/07/2022, 11:45
Nuclear physics advances in the United States and Britain from 1939 to 1945 are described. The Manhattan Project’s work led to a rapid advance in our knowledge of nuclear science. A conference in April 1943 at Los Alamos provided a simple formula used to compute critical masses and laid out the research program needed to determine the key nuclear constants. In short order, four university...
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Zhizhou Ren25/07/2022, 12:09
Neutron-induced fission cross section of 232Th has important applications in the Th/U fuel cycle. A measurement of the 232Th/235U fission cross section ratios in 1-20 MeV energy region was carried out by the time-of-flight method and Fast Ionization Chamber Spectrometer for Fission Cross Section Measurement (FIXM) at the China Spallation Neutron Source (CSNS)- Back-n white neutron source...
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Michael Bacak25/07/2022, 12:21
The 233U nucleus plays a key role as the fissile isotope in the Th-U fuel cycle. Consequently the accurate knowledge of its fission and capture cross sections is essential for a potential reactor design. As highlighted by the NEA High Priority Request List, the 233U(n,g) is of high importance for the production and destruction of 233U and is required to facilitate defining the reprocessing...
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Carole Chatel25/07/2022, 12:33
Improvement in neutronics codes jointly with the advent of high performance computing systems made the calculations more sensitive to the nuclear data. The latter are used both for solving the neutron transport equation together and for nuclear instrumentation validation and operation. Hence, it becomes relevant to improve the knowledge of the fission cross section of fertile secondary...
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Yonghao Chen25/07/2022, 12:45
Neutron-induced fission cross sections of U-235 and U-238 are ones of the most important nuclear data since they are fundamental to nuclear energy. Fission cross sections of U-235 and U-238 have been evaluated as standard data up to 200 MeV and they are always used as references for other cross section measurements. However, the experimental data in high neutron energy region are scarce....
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Adam Daskalakis25/07/2022, 12:57
Neutron time-of-flight quasi-differential high energy scattering measurements of uranium-238 and natural iron were made at the Rensselaer Polytechnic Institute (RPI) Gaerttner Linear Accelerator Center. Data from the measurements were compared to evaluated nuclear data libraries using MCNP to identify energy-angle discrepancies from 0.5 to 20 MeV, and elastic-to-inelastic scattering ratios...
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Victor Babiano-Suarez, n_TOF collaboration26/07/2022, 06:00
The slow neutron capture ($s$-) process is responsible for the formation of half of the elements heavier than iron in the Universe. Despite the long time scale of this process, the long half-life of some isotopes throughout the $s$-process reaction flow creates branching points that lead to the division of the nucleosynthesis path. ${79}$Se ($t_{1/2} = 3.27 \times 10^5$ y [1]) represents one...
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Mirco Dietz, the n_TOF Collaboation26/07/2022, 06:24
The slow neutron capture process (s-process) is responsible for producing about half of the elemental abundances heavier than iron in the universe. Neutron capture cross sections on stable isotopes are a key nuclear physics input for s-process studies. The $^{72}\mathrm{Ge}(n,\gamma)$ Maxwellian-Averaged Cross Section (MACS) has an important influence on production of isotopes between Ge and...
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Gianpiero Gervino26/07/2022, 06:36
The correct prediction of the abundances of the light nuclides produced during of Big Bang Nucleosynthesis (BBN) is one of the main topics of modern cosmology. In order to precisely determine BBN 6 Li production the cross-section of the nuclear reaction 2H(α, γ)6Li must be directly measured within the astrophysical energy range of 30-400 keV. This measurement requires ultra low gamma-ray...
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Claudia Montanari26/07/2022, 06:48
Stopping powers are relevant to a wide range of applications, such as ion beam analysis, deposition ranges, ion implantation, and radiation damage, to name a few. Reliable values of stopping powers are also needed in isotope production for medical applications, in fusion technologies and detector development.
In this work we present the state of the art of the stopping power of ions in...
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Seiya Manabe26/07/2022, 07:00
The main threat to electronics at the ground level is well-known as the secondary-cosmic-ray-induced soft error. The soft error is caused by an upset of the memory information due to an energy deposition by an energetic ionizing radiation. Among the cosmic-ray species, the muon has recently drawn attention as a new cause of the soft error due to the reduction of the critical charge of the...
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Maelle Kerveno26/07/2022, 09:30
GRAPhEME is a $\gamma$ spectrometer developed by CNRS/IPHC Strasbourg (France), in collaboration with EC-JRC/Geel (Belgium) and IFIN-HH Bucharest (Romania). With its 6 High Purity Planar Germanium detectors, GRAPhEME, installed at the EC-JRC GELINA facility, was optimized for measurements of accurate (n,xn $\gamma$) cross sections on actinides. The experimental methodology is based on prompt...
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Valentina Semkova26/07/2022, 09:54
Neutron-induced reaction cross-sections on hafnium isotopes are important for research and nuclear applications. Hafnium is considered as a constituent of the control elements and structural materials of nuclear reactors due to its high absorption cross-section for thermal neutrons, good mechanical properties and extremely high resistance to corrosion. Hafnium is an alloying element of low...
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Rosa Vlastou26/07/2022, 10:06
Neutron induced reactions can provide significant information in the field of nuclear physics and applications. Hafnium (Hf) is one of the rare-earth isotopes with a relative large total neutron cross-section in the thermal neutron energy region and neutron induced reactions in reactor materials could lead to the production of long-lived isomeric states of Hf isotopes. Thus, the knowledge of...
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Roland Beyer26/07/2022, 10:18
Significant shortcomings in the resolved resonance region of all existing evaluations of iron isotopes have been identified from leakage neutron measurements to be related to inaccurate elastic cross sections minima between 50 and 700 keV [1,2]. Those regions are only sensitive to highly accurate transmission measurements through very thick samples. The overestimation of the measured yield in...
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Brian Epping26/07/2022, 10:30
A new experiment configuration was designed, developed and implemented to measure photoneutron yields using the Rensselaer Polytechnic Institute (RPI) electron linear accelerator (LINAC) at the RPI Gaerttner LINAC Center. The new experiment configuration includes a new target assembly that converts the LINAC electron beam into a high energy bremsstrahlung photon flux incident upon a sample...
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Dominik Fritz26/07/2022, 10:42
Recently, a cold moderator was designed and developed for use at the RPI LINAC. This cold moderator proved to easily and safely couple to an existing neutron producing target, while enhancing neutron flux below 0.02 eV by cooling polyethylene down to 29 K. This cold moderator capability allowed for significantly improved counting statistics below 0.02 eV not previously possible due to a poor...
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Anton Wallner26/07/2022, 11:15
The recommended cross-section value for $^{235}$U neutron-capture at thermal energies is largely based on the difference from total and competing cross-sections of $^{235}$U. Despite its importance as a thermal neutron constant and its high value (100 barn), direct capture measurements are rare (only two exist for thermal energies) and exhibit large uncertainties. The reason is the difficulty...
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Beatriz Jurado26/07/2022, 11:15
Obtaining reliable cross sections for neutron-induced reactions on unstable nuclei is a highly important task and a major challenge. These data are essential for understanding the synthesis of heavy elements in stars and for applications in nuclear technology. However, their measurement is very complicated as both projectile and target are radioactive. The NECTAR (NuclEar reaCTions At storage...
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Riccardo Mucciola, the n_TOF Collaboration26/07/2022, 11:39
Cross-sections for neutron-induced interactions with molybdenum, in particular for the neutron capture reaction, play an important role in various fields ranging from nuclear astrophysics to safety assessment of conventional nuclear power plants and the development of innovative technologies. It is found as a pollutant in pre-solar silicon carbide grains and it has a crucial role in stellar...
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Gilles Noguere26/07/2022, 11:39
The zero-power reactor MINERVE (CEA Cadarache) was designed to perform reactivity worth measurements by the oscillation technique. The various experimental programs, undertaken for the last thirty years, involved cylindrical samples with a diameter of about 1 cm and a height ranging from a few cm to 10 cm. Most of the samples are composed of UO2 pellets with a given fission product, actinide...
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Veatriki Michalopoulou, the n_TOF Collaboration26/07/2022, 11:51
Neutron induced reaction cross section measurements are often performed relative to a neutron cross-section standard. Thus, the accuracy of the neutron standards determines the accuracy of the neutron cross section measurements. The $^{235}$U(n,f) cross section is widely used as reference reaction, while it is considered as standard at 0.0253 eV (thermal energy), between 7.8 and 11 eV and from...
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Sukhjinder Singh26/07/2022, 11:51
$^{54}$Fe capture cross section measurements were conducted at the Rensselaer Polytechnic Institute (RPI) Gaerttner Linear Accelerator (LINAC) Center using an enriched $^{54}$Fe sample in the keV energy region. $^{54}$Fe is a constituent of natural iron, which is present in a large variety of nuclear grade materials.Therefore, it is important to have an accurate understanding of the cross...
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Eames Bennett26/07/2022, 12:03
Measurements of neutron elastic scattering and angular distributions remain one of the largest uncertainties in simulations of fission-driven nuclear systems. Current experimental techniques are limited by issues arising from measuring only neutrons or gammas or, in the case where both particles are measured, the relatively small number of angles current dual n-gamma detectors are capable of...
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Tatsuya Katabuchi26/07/2022, 12:03
Tellurium isotopes are produced in nuclear reactors as fission products. Evaluation of neutron nuclear data of Tellurium isotopes was made recently [1]. On the other hand, $^{128}$Te is one of the candidate nuclides for neutrino-less double beta decay searches. Neutron-induced reactions of $^{128}$Te are important to evaluate background in measurement [2]. However, experimental data of the...
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Esther Leal Cidoncha26/07/2022, 12:15
The $^{233}$U plays an important role in the Th-U fuel cycle, that has been proposed as an alternative to the U-Pu fuel cycle due to its reduced amount of transuranium elements. The available experimental $^{233}$U(n,$\gamma$) cross section data in the literature are scarce and were measured decades ago [1-3]. In 2008, the $^{233}$U(n,$\gamma$) cross section was investigated at LANL using the...
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Victor Alcayne, the n_TOF Collaboration26/07/2022, 12:15
V. Alcayne a), A. Kimura b), E. Mendoza a), D. Cano-Ott a), T. Martinez a), E. González-Romero a), A. Pérez de Rada a), and the n_TOF collaboration c)
a) Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), E-28040 Madrid, Spain
b) Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
c) Conseil Européen pour la Recherche Nucléaire, CERN, SwitzerlandThe safe and...
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Hideto Nakano26/07/2022, 12:27
The long-term accumulation of Long-Lived Fission Products (LLFPs) in nuclear waste has been a significant issue in nuclear industry due to their long half-life. The nuclear transmutation of LLFPs into short-lived or stable nuclides is expected to contribute reducing the current amount of high-level radioactive waste. Highly accurate nuclear data for the neutron-induced nuclear reactions are...
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Dr Adina Olacel (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH))27/07/2022, 06:00
The GAINS spectrometer operating at the GELINA neutron source (EC-JRC-Geel) is one of the best known setups within the nuclear data community. It provides reliable, high resolution $\gamma$-production cross-section data of importance both for the fundamental nuclear physics research and its many applications. The story of this spectrometer started around 2000 with just 2 large volume HPGe...
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Tyler Nagel27/07/2022, 06:24
Measurements of $^{35}$Cl(n,x) reaction cross sections were conducted at Lawrence Berkeley National Laboratory’s (LBNL) 88-Inch Cyclotron using neutrons produced via thick target deuteron breakup from a 14 MeV deuteron beam. These cross sections are vital to the design of Molten Chloride Fast Reactors (MCFR), especially in the 0.1 MeV – 1.0 MeV region where little experimental data exist but...
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Hye Young Lee27/07/2022, 06:36
Nuclear reaction data for neutron induced reactions on unstable nuclei are critical for a wide range of applications spanning from studies of nuclear astrophysics, nuclear reactor designs, and for radiochemistry diagnostics. However, due to the difficulty in performing this class of measurements, and the resulting lack of experimental data, nuclear data evaluations of the reaction cross...
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Alexandru Negret27/07/2022, 06:48
The extended dataset of 56Fe(n,ng) cross sections measured by our group more than a decade ago at GELINA [1] was used in many recent evaluations like ENDF, JEFF and CIELO. Despite the special measures we took to ensure reliability and accuracy, concerns were raised by various groups with regard to several features of our dataset (absolute normalization an/or shape) and therefore the...
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Robert Grzywacz (University of Tennessee)27/07/2022, 07:00
Beta-delayed neutron emission is a dominant decay mode for the very neutron-rich nuclei. With the opportunities offered by new generation radioactive beam facilities, we can perform experiments with a larger and more exotic pool of isotopes. This enabled us to revisit the conventional views on the fundamentals of beta delayed neutron emission. However, new data and improved models are...
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Dr Rudra N. Sahoo (The Hebrew University of Jerusalem)27/07/2022, 07:45
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Daniil Koliadko27/07/2022, 07:57
The Nuclear Energy Agency's High Priority Nuclear Data Request List (HPRL) is a compilation of the highest priority nuclear data requirements. The U-120M cyclotron of the Nuclear Physics Institute of the Czech Academy of Sciences is a suitable tool for studies of several reactions from this list. In this paper, we present the measurements of the ${}^{7}$Be and tritium production in the lithium...
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Darren Bleuel27/07/2022, 08:09
To investigate the use of argon as a deuteron beam stopping volume, the $^{40}$Ar(d,p)$^{41}$Ar cross section was measured at average deuteron energies of 3.6 MeV, 5.5 MeV, and 7.0 MeV using an activation method. Natural nickel foils were used as both beam degraders and monitors, as the $^{nat}$Ni(d,x)$^{61}$Cu reaction has historically been one of only a few IAEA-recommended beam monitor...
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Adriana Ioana Gheorghe27/07/2022, 08:21
Photoneutron reactions on $^{208}$Pb in the Giant Dipole Resonance (GDR) energy range have been investigated at the $\gamma$-ray beam line of the NewSUBARU synchrotron radiation facility in Japan. The double magic $^{208}$Pb is a benchmark case for theoretical modeling of electric dipole response in nuclei. It has been extensively investigated through photonuclear reactions as well as through...
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Daniel Cano-Ott27/07/2022, 08:33
Neutron yields and energy spectra from ($\alpha$,xn) reactions are relevant data for several fields such as nuclear astrophysics, underground physics (low background measurements), nuclear technologies and applications like nuclear safeguards. The existing experimental data have been obtained with thin and thick targets often via activation measurements or in direct neutron measurements using...
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Sotirios Chasapoglou27/07/2022, 11:00
The study of neutron induced reactions on Ge isotopes is of major importance, both for practical applications and fundamental research in Nuclear Physics. Practical applications include dosimetry, nuclear medicine, astrophysical projects, reactor and detector technology. As far as the fundamental research is concerned, some of the residual nuclei following (n,2n) and (n,a) reactions are...
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Hye Young Lee27/07/2022, 11:24
Oxygen is present in many materials - water, oxides, concrete and elsewhere - and the uncertainties in its nuclear data can have a significant impact on many nuclear applications. The current status of the oxygen-16 data is a 30-50 % discrepancy among various $^{16}$O(n,$\alpha$) and $^{13}$C($\alpha$,n) cross section measurements. Reconciling these discrepancies and settling on a best value...
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Hamza Amar27/07/2022, 11:36
We present the results of the $^{35}$Cl(n,p)$^{35}$S cross section measurement using $^{10}$B(n,α)$^{7}$Li as reference at the n_TOF Experimental Area 2 (EAR-2) facility at CERN, providing data below 100 keV. On the one hand, this reaction is of interest in astrophysics as it is involved in the production of $^{36}$S, whose astrophysical origin remains unresolved [1], as well as the observed...
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Vivek Chavan27/07/2022, 11:48
The development of accelerator driven systems, spallation neutron sources and other nuclear technologies require cross section data of neutron-induced reactions above 20 MeV. But the cross section data for neutron energies above 30 MeV are not so abundant in EXFOR, mainly due to the difficulties in obtaining monoenergetic neutron sources. Therefore, the activation cross sections have been...
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Prof. Mayeen Khandaker27/07/2022, 12:00
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Benoit Mauss28/07/2022, 06:00
Neutrons emitted in fission events can be detected with remarkable precision using the highly segmented Chi-Nu neutron liquid scintillator array at the Weapons Neutron Research facility of the Los Alamos Neutron Science Center. In two recent studies, prompt fission neutron spectra (PFNS) [1] and average prompt fission neutron multiplicities [2] from $^{238}$Pu(n,f) were measured with respect...
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Frank Gunsing28/07/2022, 06:24
The neutron capture cross section of $^{241}$Am is an important quantity for nuclear energy production and fuel cycle scenarios. Several measurements have been performed in recent years with the aim to reduce uncertainties in evaluated data. Two previous measurements [1,2], performed at the 185 m flight-path station EAR1 of the neutron time-of-flight facility n_TOF at CERN, have permitted to...
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Gašper Žerovnik28/07/2022, 06:36
In spent nuclear fuel, $^{241}$Am is an important contributor to the decay heat and radiotoxicity for cooling times between several decades and a few centuries. Inherent $\gamma$-ray emission from $^{241}$Am aggravate time-of-flight (TOF) measurements of $^{241}$Am capture cross section. Alternatively, $^{241}$Am thermal neutron capture cross section and resonance integral may be estimated by...
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Yu Kodama28/07/2022, 06:48
The management of high-level nuclear waste (HLW) from nuclear power plants is a significant issue to continue using nuclear energy in the future. To solve this, studies of nuclear transmutation system such as the accelerator-driven system (ADS) that transmute long-lived nuclides to shorter or stable ones due to neutron-induced reactions have been ongoing in recent years. Precise nuclear data...
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Nikola Jovancevic28/07/2022, 07:00
N. Jovancevic$^1$, M. Krmar$^1$, S. Abou El-Azm$^2$, M. Demichev$^2$, D. Demin$^2$, M. Gostkin$^2$, V. Kobets$^2$, U. Kruchonak$^2$, A. Nozdrin$^2$, S. Porokhovoy$^2$, T.Shneydman$^2$, A. Zhemchugov$^2$, D. Knezevic$^3$, D. Maletic$^{3}$
$^1$) Department of Physics, Faculty of Science, University of Novi Sad, Serbia \
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nikola.jovancevic@df.uns.ac.rs\
$^2$) Dzhelepov Laboratory of Nuclear... -
Song Feng28/07/2022, 07:12
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Keegan Kelly (Los Alamos National Laboratory)28/07/2022, 07:50
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Francois Claeys28/07/2022, 08:14
In the context of the development of Gen. IV nuclear reactors, the GIF (Generation IV. International Forum) has selected six innovative technologies. Among them, one can highlight the concept of breeding for $^{232}$Th/$^{233}$U and $^{238}$U/$^{239}$Pu fuel cycles. But those nuclei, crucial for such cycles, suffer from a lack of precise knowledge (nuclear structure, reaction cross sections)....
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Greg Henning28/07/2022, 08:26
The necessary improvement of evaluated nuclear data for nuclear applications development is possible through new and high-quality experimental measurements, often combined with appropriate nuclear-reaction modelling. In particular, improving inelastic cross-section evaluations requires new and high-quality data.
Our group at CNRS-IPHC developed an experimental program to measure (n, n’...
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Dal-Ho Moon28/07/2022, 08:38
The neutron production double-differential cross sections (DDX) from thin $^{nat}$C, $^{93}$Nb and $^{209}$Bi targets bombarded by 290 MeV/u $^{136}$Xe ions were measured by using the Heavy Ion Medical Accelerator in Chiba (HIMAC) facility of National Institute of Radiological Sciences (NIRS), Japan. The NE213 liquid organic scintillators were placed at the angles of 15°, 30°, 45°, 60°, 75°...
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Joseph Gordon28/07/2022, 08:50
Improved inelastic neutron scattering and neutron-induced gamma-ray production data are needed for the next generation of nuclear technologies, from advanced reactors to space exploration, shielding applications, and detection platforms based on prompt neutron interrogation analysis.
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The Gamma Energy Neutron Energy Spectrometer for Inelastic Scattering (GENESIS), located at the 88-Inch... -
Victor Alcayne (CIEMAT (Spain))28/07/2022, 09:02
A segmented total energy detector (sTED) for (n, γ) cross section measurements at n_TOF EAR2
V. Alcayne1, D. Cano-Ott1, E. González-Romero1, T. Martínez1, E. Mendoza1, A. Sánchez-Caballero1, J. Balibrea2, C. Domingo-Pardo2, J. Lerendegui2 and n_TOF collaboration3
1CIEMAT, Spain
2IFIC CSIC-UV, Spain
3CERN, SwitzerlandThe neutron time-of-flight facility n_TOF [1] is characterised by its high...
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Toni Kogler28/07/2022, 09:40
Precise neutron-induced fission cross-sections of actinides such as the plutonium isotopes are of relevance for the development of future transmutation technologies and 4$^\text{th}$ generation of nuclear reactors. In contrast to thermal reactors, these future technologies employ the fast-neutron spectrum.
For $^{242}$Pu current uncertainties of the fission cross section in the energy region...
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Marian Boromiza28/07/2022, 10:04
A new (n,n'γ) experiment was performed at the Geel Electron LINear Accelerator (GELINA) of the European Commission-Joint Research Center (EC-JRC) to measure high resolution neutron cross-sections on several nickel isotopes. To detect the radiation of interest we made use of the Gamma Array for Inelastic Neutron Scattering (GAINS) spectrometer which consists of twelve HPGe detectors with 100%...
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Klaus Guber28/07/2022, 10:16
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Cesar Domingo Pardo, the n_TOF Collaboration28/07/2022, 10:28
Radiative neutron-capture cross sections are of pivotal importance in many fields such as nucleosynthesis studies or innovative reactor technologies. A large number of isotopes have been measured with high accuracy, but there are still a large number of relevant isotopes whose cross sections could not be experimentally determined yet, at least with sufficient accuracy and completeness, owing...
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Shoichiro Kawase28/07/2022, 11:30
The long-lived fission products (LLFPs) produced in nuclear reactors have been an important issue because of the difficulty of disposal due to their long lifetimes. Therefore, some treatment methods to transform the LLFPs into short-lived or low-toxic materials are desired, and nuclear transmutation technology is expected to be one of the solutions. However, the reaction data of LLFPs required...
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Cristina Clisu-Stan28/07/2022, 11:54
A high-and-flat efficiency moderated neutron detection array has been recently developed for photoneutron cross section measurements at the future ELI-NP gamma-ray beam source. It is composed of three concentric rings of 4, 8 and 16 $^3$He proportional counters embedded in a high density polyethylene block and has a ~37% efficiency flat within 5% in the 10 keV to 5 MeV neutron energy interval....
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Hiroki Iwamoto28/07/2022, 12:06
An accelerator-driven transmutation system (ADS) is a potential candidate for treating high-level radioactive waste generated from nuclear power plants. For predicting the radioactivity of the components of ADS and assessing impurity behavior in lead-bismuth eutectic (LBE), nuclide production cross sections play a vital role. So far, we have measured 7 nuclide production cross sections in the...
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Francisco Javier Ferrer Fernandez28/07/2022, 12:18
Due to the introduction of several novel applications of He implantation, e.g. in materials of future fusion reactors [1 and in optical waveguides [2, 3], the need for elemental analysis of helium has recently increased dramatically. Depth profiling of helium can be realized by several ion beam analysis methods. Proton elastic backscattering spectrometry (p-EBS) is a basic method for such...
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Yukinobu Watanabe28/07/2022, 12:30
Intensive fast neutron sources using deuteron accelerators have been proposed for the study of medical RI production, radiation damage for fusion reactor materials, nuclear transmutation of radioactive waste, and so on. Neutron production data from various materials bombarded by deuterons are required for the design of such neutron sources. However, the experimental data, e.g....
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Hiroki Iwamoto28/07/2022, 12:42
For accurate prediction of neutronic characteristics for accelerator-driven systems (ADS) and a source term of spallation neutrons for reactor physics experiments for the ADS at Kyoto University Critical Assembly (KUCA) [1], we have launched an experimental program to measure nuclear data on ADS using the Fixed Field Alternating Gradient (FFAG) accelerator at Kyoto University. As part of this...
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Sebastian Urlass
The $^{16}$O(n,$\alpha$)$^{13}$C reaction plays an important role in nuclear technology [1,2]. Oxygen is a major component of the fuel and in the water coolant of nuclear power reactors. This reaction influences criticality through the removal of neutrons and produces helium in the fuel which may lead to swelling.
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A new reaction cross section measurement was carried out at the time-of-flight... -
Adrian Sanchez Caballero, The n_TOF Collaboration
The reduction of the uncertainties of neutron capture and fission cross sections of major and minor actinides is important for the improvement of the design of nuclear reactors and the optimization of nuclear waste management strategies, especially in life extension and higher burnup scenarios. In particular, neutron capture on $^{240}$Pu is the responsible for the formation of $^{241}$Am, via...
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Daniel Votaw
(n,Z) reaction cross sections on stable, structural materials at fast neutron energies are important for understanding H and He production in fusion and Gen IV fission reactors. But for certain reactions, or at certain energies, data are sparse, and evaluated cross sections disagree. Improved measurements of exclusive cross sections and angular distributions are needed to inform evaluations....
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Cristian Massimi, and the n_TOF Collaboration (https://ntof-exp.web.cern.ch/)
The charge independence of nuclear forces implies that in describing nuclear structure we do not have to distinguish between neutrons and protons. This symmetry is broken by electromagnetic interaction leading to a vast field of investigation aimed at clarifying the coupling between strong and electromagnetic forces. That is why, after so many decades since the first formulation of the nuclear...
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Christopher Brand
Fast, high-flux neutrons are an attractive source for imaging due to their ability to penetrate high-Z materials. Intense neutron sources also provide a powerful tool to measure neutron scattering cross sections needed to advance basic and applied nuclear science and engineering. However, intense continuous neutron sources are difficult to characterize due to the inapplicability of traditional...
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Roland Beyer
The inelastic scattering of fast neutrons from $^7$Li nuclei was investigated at the nELBE neutron-time-of-flight facility. This process has technological implications in fusion and fission reactors. In the former it could create an intense $\gamma$-ray field causing heating and radiation damage, in the latter it could strongly influence the neutron energy spectrum and therefore the...
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Adrian Sanchez Caballero, The n_TOF Collaboration
More accurate neutron capture cross-section data for $^{239}$Pu are required for the design of new critical nuclear systems such as Gen IV reactors and Accelerator Driven Systems (ADS) and for the operation of thermal reactors, especially when loaded with MOX fuels. Therefore, the capture cross-section of $^{239}$Pu is included in the NEA/OCDE High Priority Request List [1].
At present...
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Alexander Prokofiev (Uppsala University)
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Begona Fernandez Martinez
Neutron induced charged particle production reactions (n,chp) are of interest in different research fields, among others, astrophysics, nuclear technology and nuclear medicine. In this context, a viability study for measuring (n,chp) reactions at the HiSPANoS facility has been carried out. HiSPANoS, at the Centro Nacional de Aceleradores (CNA), is the only accelerator based neutron source in...
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Liviu Stoica
A new 40Ca(n,n’γ)40Ca experiment has been performed at the European Commission - Joint Research Center (EC - JRC) Geel Electron LINear Accelerator (GELINA) facility in Belgium. This isotope is of importance for the nuclear energy industry due to fact that Generation IV Molten Salt Reactors (MSRs)will use, among other candidates, the LiF−CaF2melt. Considering that the neutron inelastic...
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Brian Frandsen
Neutron inelastic scattering cross-section data are limited for many isotopes, necessitating new and/or more accurate measurements to improve the data for radiation transport modeling and simulations for a wide variety of power, defense, and nonproliferation applications. The newly commissioned Gamma Energy Neutron Energy Spectrometer for Inelastic Scattering (GENESIS) capability at the...
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Anton Wallner
The detection of long-lived radionuclides through ultra-sensitive isotope ratio measurements via accelerator mass spectrometry (AMS) offers opportunities for precise measurements of neutron capture cross sections, e.g. for nuclear astrophysics. For specific reactions AMS provides a unique tool to pin down uncertainties which is important to address existing discrepancies. This approach...
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Javier Balibrea-Correa, the n_TOF Collaboration
Neutron capture cross-sections are an essential ingredient for many research fields, particularly for nuclear reactor technologies and astrophysical studies. Therefore, a big effort is being made worldwide with the aim of improving neutron-beam facilities, detection systems and sample production techniques with the goal of getting new or more accurate nuclear data.
However, ineluctable...
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