2008/01/07 by P. F. Mantica, R. Broda, H. L. Crawford +18 · 34 citations
Chemistry · Physics and Astronomy · #Astronomical and nuclear sciences #Chemistry #Crystallography #Energy (signal processing) #Isotope #Neutron #Nuclear Physics and Applications #Nuclear physics #Nuclear physics research studies #Physics #Quantum mechanics #nucl-ex
paper · pdf · doi:10.1103/physrevc.77.014313
published in Physical Review C 77(1) (American Institute of Physics) · 11 figures
arxiv created 2008/01/07 · openalex publication_date 2008/01/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
\ensuremathβ-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time for 54Ca (86\ifmmode±\else\textpm\fi7 ms), 55Ca (22\ifmmode±\else\textpm\fi2 ms), and 56Ca (11\ifmmode±\else\textpm\fi2 ms). The half-life of 230\ifmmode±\else\textpm\fi60 ms deduced for 53Ca is significantly longer than reported previously, where the decay chain 53K \ensuremath→ 53Ca \ensuremath→ 53Sc was considered. A delayed \ensuremathγ ray with an energy of 247 keV was identified following \ensuremathβ decay of 54Ca and is proposed to depopulate the 11+ level in 54Sc. The \ensuremathβ-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 \ensuremathβ-decay theory. The systematic trend of the neutron-rich Ca half-lives is consistent with the presence of a subshell gap at N=32.