article · MPG.PuRe (Max Planck Society) · 2025
The T = 2 isobaric multiplet
P. Aguilera, F. Molina, B. Rubio, S. Orrigo, W. Gelletly, Y. Fujita, J. Agramunt, A. Algora, V. Guadilla, A. Montaner-Pizá, A. Morales, H. Arellano, P. Ascher, B. Blank, M. Gerbaux, J. Giovinazzo, T. Goigoux, S. Grévy, T. Kurtukian Nieto, C. Magron, J. Chiba, D. Nishimura, S. Yagi, H. Oikawa, Y. Takei, D. Ahn, P. Doornenbal, N. Fukuda, N. Inabe, T. Kubo, S. Kubono, S. Nishimura, Y. Shimizu, T. Sumikama, H. Suzuki, H. Takeda, J. F. Wu, V. Phong, G. Kiss, P. Söderström, M. Tanaka, F. Diel, D. Lubos, S. Lenzi, G. de Angelis, D. Napoli, C. Borcea, A. Boso, R. ; https://orcid.org/0000-0002-8400-1718 Cakirli, E. Ganioglu and 2 more
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Abstract
In this paper we present our results on the decay of <sup>64</sup>Se. It is the heaviest T<sub>z</sub> = −2 nucleus that both β decays and has a stable mirror partner (T<sub>z</sub> = +2), thus allowing comparison with charge exchange reaction studies. The β decays of <sup>64</sup>Se and its descendants were studied at the RIKEN Nishina Center (Japan) following their production in the fragmentation of <sup>78</sup>Kr on a beryllium target. β-Delayed γ-ray and particle radiation was identified for each of the nuclei in the decay chain allowing us to obtain decay schemes for <sup>64</sup>Se, <sup>64</sup>As, and <sup>63</sup>Ge. Thus new excited states could be found for the descendant nuclei, including the interesting case of the N = Z nucleus <sup>64</sup>Ge. Furthermore, we observed for the first time the β-delayed proton emission of <sup>64</sup>Se and <sup>64</sup>As. Based on these results we obtained proton branching ratios of 48.0(9)% in <sup>64</sup>Se decay and 4.4(1)% in <sup>64</sup>As decay. We obtained a half-life value of 22.5(6) ms for <sup>64</sup>Se decay and half-lives slightly more precise than those in the literature for each nucleus involved in the decay chain. Using our results on the excited levels of <sup>64</sup>As and the mass excess in the literature for <sup>63</sup>Ge we obtained −39588(50) keV for the mass excess of <sup>64</sup>As. Then based on the isobaric mass multiplet equation we obtained the mass excess of −27429(88) keV for <sup>64</sup>Se by extrapolation. The mirror process of <sup>64</sup>Se β decay, the charge exchange reaction <sup>64</sup>Zn(<sup>3</sup>He, t) <sup>64</sup>Ga, has already been measured allowing us to study the mirror symmetry through the comparison of the weak force (βa decay) and strong force (charge exchange reaction). An interpretation of the decay schemes based on the idea of the antisnalogue tate is proposed.
Cite this paper
Aguilera, P., Molina, F., Rubio, B., Orrigo, S., Gelletly, W., Fujita, Y., Agramunt, J., Algora, A., Guadilla, V., Montaner-Pizá, A., Morales, A., Arellano, H., Ascher, P., Blank, B., Gerbaux, M., Giovinazzo, J., Goigoux, T., Grévy, S., Nieto, T. K., . . . Ganioglu, E. (2025). The T = 2 isobaric multiplet. MPG.PuRe (Max Planck Society).
Aguilera, P., et al. “The T = 2 isobaric multiplet.” MPG.PuRe (Max Planck Society), 2025.
Aguilera, P., F. Molina, B. Rubio, S. Orrigo, W. Gelletly, Y. Fujita, J. Agramunt, et al. 2025. “The T = 2 isobaric multiplet.” MPG.PuRe (Max Planck Society).
Aguilera, P. et al. (2025) ‘The T = 2 isobaric multiplet’, MPG.PuRe (Max Planck Society).
@article{aguilera2025isobaric,
title = {{The T = 2 isobaric multiplet}},
author = {Aguilera, P. and Molina, F. and Rubio, B. and Orrigo, S. and Gelletly, W. and Fujita, Y. and Agramunt, J. and Algora, A. and Guadilla, V. and Montaner-Pizá, A. and Morales, A. and Arellano, H. and Ascher, P. and Blank, B. and Gerbaux, M. and Giovinazzo, J. and Goigoux, T. and Grévy, S. and Nieto, T. Kurtukian and Magron, C. and Chiba, J. and Nishimura, D. and Yagi, S. and Oikawa, H. and Takei, Y. and Ahn, D. and Doornenbal, P. and Fukuda, N. and Inabe, N. and Kubo, T. and Kubono, S. and Nishimura, S. and Shimizu, Y. and Sumikama, T. and Suzuki, H. and Takeda, H. and Wu, J. F. and Phong, V. and Kiss, G. and Söderström, P. and Tanaka, M. and Diel, F. and Lubos, D. and Lenzi, S. and de Angelis, G. and Napoli, D. and Borcea, C. and Boso, A. and Cakirli, R. ; https://orcid.org/0000-0002-8400-1718 and Ganioglu, E. and others},
journal = {MPG.PuRe (Max Planck Society)},
year = {2025}
}Made from the index record. Check names, capitalisation and page numbers against the paper. Need another style? AI for Research has over 10,000.