Conveners
Measurements: I
- Mark Chadwick ()
Measurements: II
- Keegan Kelly ()
Measurements: III
- Gilles Noguere ()
Measurements: IV
- Beatriz Jurado ()
Measurements: XIII (capture)
- Adina Coman ()
Measurements: V
- Hye Young Lee (Los Alamos National Laboratory)
Measurements: VI
- Frank Gunsing ()
Measurements: VII
- Alberto Mengoni ()
Measurements: VIII
- Darren Bleuel ()
Measurements: IX
- Maelle Kerveno ()
Measurements: X
- Alexandru Negret ()
Measurements: XI
- Valentina Semkova ()
Measurements: XII
- María Teresa Rodríguez González (University of Sevilla)
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...
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...
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...
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...
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...
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...
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...
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, Switzerland
The safe and...
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...
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...
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, Switzerland
The neutron time-of-flight facility n_TOF [1] is characterised by its high...
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...
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...
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...
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...
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...
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...
