Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)

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Pallas, M, Tarifeno-Saldivia, A, Kiss, GG, Tain, JL, Tolosa-Delgado, A, Vitez-Sveiczer, A, Calvino, F, Agramunt, J, Aguilera, P, Algora, A et al (show 51 more authors) , Allmond, JM, Baba, H, Brewer, NT, Caballero-Folch, R, Coleman-Smith, PJ, Cortes, G, Davinson, T, Dillmann, I, Domingo-Pardo, C, Estrade, A, Fukuda, N, Go, S, Griffin, CJ, Grzywacz, RK, Hall, O, Harkness-Brennan, LJ, Isobe, T, Kahl, D, King, TT, Korgul, A, Kovacs, S, Kubono, S, Labiche, M, Liu, J, Madurga, M, Miernik, K, Molina, F, Mont-Geli, N, Morales, AI, Nacher, E, Navarro, A, Nepal, N, Nishimura, S, Piersa-Silkowska, M, Phong, V, Rasco, BC, Romero-Barrientos, J, Rubio, B, Rykaczewski, KP, Saito, Y, Sakurai, H, Shimizu, Y, Singh, M, Sumikama, T, Suzuki, H, Szegedi, TN, Takeda, H, Wang, K, Wolinska-Cichocka, M, Woods, PJ and Yokoyama, R (2023) Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160). .

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Abstract

<jats:p>At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (<jats:italic>T</jats:italic><jats:sub>1/2</jats:sub>) and β-delayed neutron-emission probabilities (<jats:italic>P</jats:italic><jats:sub><jats:italic>xn</jats:italic></jats:sub>). 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 <jats:italic>T</jats:italic><jats:sub>1/2</jats:sub> and 14 new <jats:italic>P</jats:italic><jats:sub>1<jats:italic>n</jats:italic></jats:sub> were measured. Furthermore, 38 <jats:italic>T</jats:italic><jats:sub>1/2</jats:sub> and 2 <jats:italic>P</jats:italic><jats:sub>1<jats:italic>n</jats:italic></jats:sub> 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 <jats:italic>T</jats:italic><jats:sub>1/2</jats:sub> and <jats:italic>P</jats:italic><jats:sub><jats:italic>xn</jats:italic></jats:sub> in this region.</jats:p>

Item Type:	Conference or Workshop Item (Unspecified)
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	04 Oct 2023 14:25
Last Modified:	09 Oct 2023 06:40
DOI:	10.1051/epjconf/202327912003
Open Access URL:	https://doi.org/10.1051/epjconf/202327912003
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3173413