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Author  |
IDS Collaboration (Dyszel, P. et al); Algora, A.; Nacher, E. |
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Title |
First β-Delayed Two-Neutron Spectroscopy of the r-Process Nucleus 134In and Observation of the i13/2 Single-Particle Neutron State in 133Sn |
Type |
Journal Article |
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Year |
2025 |
Publication |
Physical Review Letters |
Abbreviated Journal |
Phys. Rev. Lett. |
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Volume |
135 |
Issue |
15 |
Pages |
152501 - 8pp |
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Abstract |
This manuscript reports on the direct observation of a beta-delayed two-neutron emission in a study of In-134 at the ISOLDE Decay Station using neutron spectroscopy. We also report on the first measurement in beta(-) decay of the long-sought 13/2(+) excited state in Sn-133, attributed to be the neutron single-particle i(13/2) orbital. The observation of sequential neutron emission is used to extract the relative population of the i(13/2) state, which was found to be much smaller than the predictions of the statistical model. The experiment was possible because of the innovative use of a neutron array with neutron discrimination and interaction tracking capabilities. This is the first study of the details of the two-neutron emission for a nucleus, which belongs to the r-process path. Understanding beta-delayed two-neutron emission probabilities is essential to validate models used in astrophysical r-process nucleosynthesis calculations. Observing two-neutron emissions in beta(-) decay paves the way for new experiments to study energy and angular correlations for ssdelayed multineutron emitters. |
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Address |
[Dyszel, P.; Grzywacz, R.; Xu, Z. Y.; Madurga, M.; Gouge, J.; Piersa-Silkowska, M.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA |
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Publisher |
Amer Physical Soc |
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Language |
English |
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Edition |
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ISSN |
0031-9007 |
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Notes |
WOS:001638914600001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7018 |
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