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.; Fukuda N.; Go S.; Griffin C. J.; Grzywacz R. K.; Hall O.; Harkness-Brennan L. J.; Isobe T.; Kahl D.; King T. T.; Korgul A.; Kovács S.; Kubono S.; Labiche M.; Liu J.; Madurga M.; Miernik K.; Molina F.; Mont-Geli N.; Morales A. I.; Nácher E.; Navarro A.; Nepal N.; Nishimura S.; Piersa-Silkowska M.; Phong V.; Rasco B. C.; Romero-Barrientos J.; Rubio B.; Rykaczewski K. P.; Saito Y.; Sakurai H.; Shimizu Y.; Singh M.; Sumikama T.; Suzuki H.; Szegedi T. N.; Takeda H.; Wang K.; Wolińska-Cichocka M.; Woods P. J.; Yokoyama R.
Source
EPJ Web of Conferences, Vol 279, p 12003 (2023)
Subject
Language
English
ISSN
2100-014X
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.