β decay of neutron-rich Ca53-56

P. F. Mantica, R. Broda, H. L. Crawford, A. Damaske, B. Fornal, A. A. Hecht, C. Hoffman, M. Horoi, N. Hoteling, R. V.F. Janssens, J. Pereira, J. S. Pinter, J. B. Stoker, S. L. Tabor, T. Sumikama, W. B. Walters, X. Wang, S. Zhu

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Abstract

β-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time for Ca54 (86±7 ms), Ca55 (22±2 ms), and Ca56 (11±2 ms). The half-life of 230±60 ms deduced for Ca53 is significantly longer than reported previously, where the decay chain K53 → Ca53 → Sc53 was considered. A delayed γ ray with an energy of 247 keV was identified following β decay of Ca54 and is proposed to depopulate the 11+ level in Sc54. The β-decay properties compare favorably with the results of shell-model calculations completed in the full pf space with the GXPF1 interaction. The half-lives of the neutron-rich Ca isotopes are also compared with gross β-decay theory. The systematic trend of the neutron-rich Ca half-lives is consistent with the presence of a subshell gap at N=32.

Original languageEnglish
Article number014313
JournalPhysical Review C - Nuclear Physics
Volume77
Issue number1
DOIs
Publication statusPublished - 2008 Jan 22

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Mantica, P. F., Broda, R., Crawford, H. L., Damaske, A., Fornal, B., Hecht, A. A., Hoffman, C., Horoi, M., Hoteling, N., Janssens, R. V. F., Pereira, J., Pinter, J. S., Stoker, J. B., Tabor, S. L., Sumikama, T., Walters, W. B., Wang, X., & Zhu, S. (2008). β decay of neutron-rich Ca53-56. Physical Review C - Nuclear Physics, 77(1), [014313]. https://doi.org/10.1103/PhysRevC.77.014313