We report on the precise mass measurements of the ⁹¹ 91 Sr and ⁹⁵ 95 Y isotopes performed using the JYFLTRAP double Penning trap mass spectrometer. The mass-excess values from this work, ME(⁹¹Sr) = -83645.5(13) ME ( 91 Sr ) = - 83645.5 ( 13 ) keV and ME(⁹⁵Y) = -81226.4(10) ME ( 95 Y ) = - 81226.4 ( 10 ) keV, deviate by 6.5(52) keV and $$-18(7)$$ - 18 ( 7 ) keV from the Atomic Mass Evaluation 2020 (AME20). In the case of ⁹¹ 91 Sr the new result disagrees with the ISOLTRAP value, while for ⁹⁵ 95 Y, it agrees with the older JYFLTRAP value.
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Jaries et al. (2024) studied this question.
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