Reinvestigation of ${}^{91}$Sr and ${}^{95}$Y atomic masses using the JYFLTRAP Penning trap

Abstract

We report on the precise mass measurements of the ${}^{91}$Sr and ${}^{95}$Y isotopes performed using the JYFLTRAP double Penning trap mass spectrometer. The mass-excess values from this work, $\mathrm{ME}{(}^{91}\mathrm{Sr})=-83645.5(13)$ keV and $\mathrm{ME}{(}^{95}\mathrm{Y})=-81226.4(10)$ keV, deviate by 6.5(52) keV and $-18(7)$ keV from the Atomic Mass Evaluation 2020 (AME20). In the case of ${}^{91}$Sr the new result disagrees with the ISOLTRAP value, while for ${}^{95}$Y, it agrees with the older JYFLTRAP value.

6 pages, 2 figures