Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)
oleh: 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.
| Format: | Article |
|---|---|
| Diterbitkan: | EDP Sciences 2023-01-01 |
Deskripsi
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.