Beta decay of Neutron-Rich 53-56Ca
Abstract
Beta-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time for 54Ca [86(7) ms], 55Ca [22(2) ms], and 56Ca [11(2) ms]. The half-life of 230(6) ms deduced for 53Ca is significantly longer than reported previously, where the decay chain 53K -> 53Ca -> 53Sc was considered. A delayed gamma ray with energy 247 keV as identified following beta decay of 54Ca, and is proposed to depopulate the first 1+ level in 54Sc. The beta-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 beta-decay theory. The systematic trend of the neutron-rich Ca half-lives is consistent with the presence of a subshell gap at N=32.
Cite
@article{arxiv.0801.0994,
title = {Beta decay of Neutron-Rich 53-56Ca},
author = {P. F. Mantica and R. Broda and H. L. Crawford and A. Damaske and B. Fornal and A. A. Hecht and C. Hoffman and M. Horoi and N. Hoteling and R. V. F. Janssens and J. Pereira and J. S. Pinter and J. B. Stoker and S. L. Tabor and T. Sumikama and W. B. Walters and X. Wang and S. Zhu},
journal= {arXiv preprint arXiv:0801.0994},
year = {2008}
}
Comments
11 figures