학술논문
Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160).
Document Type
Article
Author
Pallàs, M.; Tarifeño-Saldivia, A.; Kiss, G. G.; Tain, J. L.; Tolosa-Delgado, A.; Vitéz-Sveiczer, A.; Calviño, F.; Agramunt, J.; Aguilera, P.; Algora, A.; Allmond, J. M.; Baba, H.; Brewer, N. T.; Caballero-Folch, R.; Coleman-Smith, P. J.; Cortes, G.; Davinson, T.; Dillmann, I.; Domingo-Pardo, C.; Estrade, A.
Source
Subject
*RARE earth metals
*NUCLEAR reactions
*NEUTRON capture
*NUCLEOSYNTHESIS
*NUCLEAR astrophysics
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Language
ISSN
2101-6275
Abstract
At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (T1/2) and β-delayed neutron-emission probabilities (Pxn). The setup consisted of the BigRIPS in-flight separator for particle identification, the Advanced Implantation Detector Array (AIDA) for ions and β detection, and the BRIKEN neutron counter for neutron detection. Using this arrangement, 4 new T1/2 and 14 new P1n were measured. Furthermore, 38 T1/2 and 2 P1n values were remeasured, decreasing the uncertainties for some of them. In addition to improving predictions of nucleosynthesis models that describe the production of the rare-earth peak at A ∼ 160 via the r-process, these additional experimental data should help to constrain theoretical models for calculations of T1/2 and Pxn in this region. [ABSTRACT FROM AUTHOR]