Conveners
Mass/Strucure/Decay: I
- Karsten Kossert
Mass/Strucure/Decay: II
- Nikola Jovancevic
Mass/Strucure/Decay: III
- Muriel Fallot
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Magali Estienne28/07/2022, 06:00
The accurate determination of reactor antineutrino spectra remains a very actual research topic for which new interrogations have emerged in the latest years. Indeed, after the “reactor anomaly”[1] – a deficit of measured antineutrinos at short baseline reactor experiments with respect to spectral predictions – the three international reactor neutrino experiments Double Chooz, Daya Bay and...
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Mr Zhihao Gao (Uppsala University)28/07/2022, 06:24
In nuclear physics the term meta-stable state refers to an excited state with an unusually long half-life, which can sometimes be even longer than that of the corresponding ground state. As a result, these states are often considered to be nuclei in their own right and, together with the corresponding ground state nuclei, they are referred to as isomers. The yields of...
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Israel Mardor (Tel Aviv University)28/07/2022, 06:36
Nuclear mass measurements give access to nuclear binding energies, which reflect the sum of interactions among its constituent nucleons. Certain double differences of neighboring nuclei binding energies provide $\delta$V$_{pn}$, the average interaction strength of the last one or two protons with the last one or two neutrons [1].
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We will present highly-accurate mass measurements of the... -
Nikola Jovancevic (University of Novi Sad)28/07/2022, 06:48
N. Jovancevic$^1$, D. Knezevic$^2$, A.M. Sukhovoj$^3$, L.V. Mitsyna$^3$ M. Krmar$^1$,
$^1$) Department of Physics, Faculty of Science, University of Novi Sad, Serbia \
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nikola.jovancevic@df.uns.ac.rs\
$^2$) Institute of Physics Belgrade, University of Belgrade, Belgrade, Serbia\
$^3$)Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russian... -
Daler Amanbayev (Justus-Liebig-Universität Gießen, II. Physikalisches Institut)28/07/2022, 07:00
The N=Z=50 isotope $^{100}\text{Sn}$ has long been of interest from theoretical and experimental perspectives because it is the heaviest self-conjugate doubly-magic nucleus. Despite the significant progress in the last decade, the challenge of reaching it in experimental facilities remains to date. Systematic measurements of ground state masses and isomer excitation energies in its vicinity...
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Alberto Pérez de Rada Fiol (CIEMAT)28/07/2022, 07:50
A better quantitative understanding of $\beta$-delayed neutron emission rates and spectra is relevant for nuclear structure, astrophysics, and reactor applications: $\beta$-delayed neutrons provide valuable information on the $\beta$-decay process, are needed in network calculations for understanding the stellar nucleosynthesis process, and can improve the understanding of the kinematics and...
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Max Pallàs Solís (Universitat politecnica de catalunya (UPC))28/07/2022, 08:02
Around half of the nuclei heavier than iron are created via the rapid neutron capture process (r-process). For nuclear masses $A>100$, there are two main peaks in the r-process elemental solar system abundances, located at $A\sim 130$ and $A\sim 195$, which are associated with the neutron shell closure during the $(n,\gamma)$ $\leftrightarrow$ $(\gamma ,n)$ equilibrium. In contrast, the...
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Stanimir Kisyov (Lawrence Livermore National Laboratory, Livermore, California 94550, USA)28/07/2022, 08:14
The even-A stable Xe isotopes are placed in a mass region where a variety of nuclear phenomena emerge. In particular, $^{126}$Xe and $^{128}$Xe exhibit characteristics of transitional nuclei, a possible critical point in the shape transition from spherical to γ-soft, O(6)-like nuclei [1].
In order to probe the structure and collectivity of $^{126,128}$Xe, their properties were studied in...
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Dr Ole Jens Nähle (Physikalisch-Technische Bundesanstalt)28/07/2022, 08:26
Improved current measurements for ionization chambers using the ULCA: A benchmark experiment to determine the F-18 half-life
Ole Nähle1), Dietmar Drung 1), Karsten Kossert 1), Hansjörg Scherer1), Marcell Péter Takács 1)
1) Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
Corresponding author’s e-mail: ole.j.naehle@ptb.deIonization chambers play an...
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Dr Karsten Kossert (Physikalisch-Technische Bundesanstalt)28/07/2022, 09:40
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Dorothea Schumann (Paul Scherrer Institut Villigen, Switzerland)28/07/2022, 10:04
Knowing the half-life of a radioactive isotope as precisely as possible is crucial for many research areas, for example nuclear astrophysics, nuclear energy technology or environmental research. Radionuclides with half-lives of hundreds to millions of years are particularly important, not only because of their significance in the relevant scientific field but also because of their potential...
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Nicholas Scielzo (Lawrence Livermore National Laboratory)28/07/2022, 10:16
Fission-product yields are one of the most fundamental pieces of nuclear data associated with nuclear fission, and they play an important role in fundamental neutrino science, nuclear energy, nuclear medicine, and national security. One of the most straightforward and reliable ways to determine fission-product yields is via detection of the characteristic γ rays emitted following the β decay...
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Shree Neupane (University of Tennessee)28/07/2022, 10:28
An efficient neutron detection system with good energy resolution is required to correctly characterize decays of neutron-rich nuclei where beta-delayed neutron emission is a dominant decay mode. Precision neutron spectroscopy instrumentation is essential to probe nuclear structure effects in neutron-rich nuclei in new generation radioactive beam facilities. A new high-resolution neutron...
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Alexander Kavner (LLNL)28/07/2022, 10:40
We are re-measuring the half-lives of $^{146}$Sm and $^{147}$Sm to improve the accuracy of Sm-Nd chronometers for early solar system chronology. The samarium sources are fully embedded into small Au foils and coupled to cryogenic microcalorimeters that measure heat released from each Sm alpha decay. This new detection method provides near 100% detection efficiency and a few keV energy...
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Dr Sylvain Leblond (CEA/LNHB)
For several decades, beta decay has been studied by researchers around the world in order to measure the characteristic parameters: Q-value, half-life, branching ratio, etc. While these studies have correctly characterized some of these parameters, the energy spectra of the emitted beta particles are less well known, in particular in the case of forbidden transitions. Over the past ten years,...
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Jean-Charles Thomas (GANIL)
Nuclei masses are crucial for the understanding of nuclear forces that give to the atomic nucleus its binding energy, are responsible for its structure and drive its evolution all over the nuclide chart. They are also mandatory to evaluate the reaction rates entering the modelling of explosive nucleosynthesis processes. In this context, the so-called Isobaric Multiplet Mass Equation (IMME)...
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