alpha-Cluster structure above double-shell closures and alpha-decay of Te-104

Author(s)

Souza, M. A. ^{[1, 2]} ; Miyake, H. ^[1] ; Borello-Lewin, T. ^[1] ; da Rocha, C. A. ^[3] ; Frajuca, C. ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil

^[2] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Dept Mecan, Campus Sao Paulo, Rua Pedro Vicente 625, BR-01109010 Sao Paulo, SP - Brazil

^[3] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Dept Ciencias & Matemat, Campus Sao Paulo, Rua Pedro Vicente 625, BR-01109010 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Physics Letters B; v. 793, p. 8-12, JUN 10 2019.
• Web of Science Citations: 2

Abstract

An analysis of the alpha + core properties of Te-104 along with a global discussion on the a-cluster structure above the double-shell closures is presented from the viewpoint of the local potential model. The alpha + core interaction is described by a nuclear potential of (1 + Gaussian)x(W.S. W.S.(3)) shape with two free parameters, which has been successfully tested in nuclei of different mass regions. The model produces Q(alpha) values and alpha-decay half-lives for Te-104 in agreement with the 2018 experimental data of Auranen et al. in the energy range 5.13 MeV < Q(alpha) < 5.3 MeV using an a preformation factor P-alpha = 1. The comparison of the calculated reduced alpha-widths for the ground state bands of Te-104, Mo-94 and Po-212 indicates that Te-104 has an alpha-cluster degree significantly higher than 94Mo and much higher than Po-212. These results point to Te-104 as a preferential nucleus for a-clustering in the N, Z = 50 region and corroborate the statement on the superallowed a-decay in Te-104. (C) 2019 The Authors. Published by Elsevier B.V. (AU)

• FAPESP's process: 13/26258-4 - Superdense matter in the universe
• Grantee: Manuel Máximo Bastos Malheiro de Oliveira
• Support Opportunities: Research Projects - Thematic Grants