0 citations0 references

New and comprehensive β- and βp-decay spectroscopy results in the vicinity of Sn100

Physical review. C2019Vol. 99(3)

Citations Over TimeTop 10% of 2019 papers

Abstract

A decay spectroscopy experiment on proton-rich nuclei in the vicinity of the doubly magic $^{100}\mathrm{Sn}$ was carried out at RIKEN Nishina Center. More than 20 nuclei with $43\ensuremath{\le}Z\ensuremath{\le}50$ and $N\ensuremath{\le}51$, produced by fragmentation reactions were investigated via analyses of $\ensuremath{\beta}$-decay, $\ensuremath{\beta}p$-decay, and subsequent $\ensuremath{\gamma}$-ray data. Owing to higher statistics, the precision on the half-lives of many of the ground states and isomers was improved. $\ensuremath{\beta}$-decay endpoint energies of 11 states in 8 nuclei were measured for the first time, and the corresponding ${Q}_{\text{EC}}$ and excitation energies were generally consistent with various mass models. Many $\ensuremath{\beta}$-delayed proton emission branching ratios were measured either for the first time or with higher precision compared to literature values, and some of them differed by more than $2\ensuremath{\sigma}$. Many of the large discrepancies were associated with nuclei with long-lived isomeric states, highlighting large systematic uncertainties involved in these measurements. Twenty-five new $\ensuremath{\gamma}$ rays were observed, and ten new states are proposed with unambiguous excitation energies, spins, and parities. Most of the energies of the excited states were consistent within 300 keV or 20%, whichever was greater, compared to shell model predictions in the proton/neutron $({p}_{1/2},{g}_{9/2})$ model space assuming a $^{76}\mathrm{Sr}$ core. A signature of a new $(1/{2}^{\ensuremath{-}})$ isomer in $^{97}\mathrm{Cd}$ with ${T}_{1/2}=0.73(7)$ s was found, in good agreement with shell model predictions.

Citations Over TimeTop 10% of 2019 papers

Abstract

Related Papers