β -decay Q values among the A=50 Ti-V-Cr isobaric triplet and atomic masses of Ti 46,47,49,50, v 50,51, and Cr 50,52-54

R. M.E.B. Kandegedara, G. Bollen, M. Eibach, N. D. Gamage, K. Gulyuz, C. Izzo, M. Redshaw, R. Ringle, R. Sandler, A. A. Valverde

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Abstract

Using high-precision Penning trap mass spectrometry at the Low Energy Beam and Ion Trap facility at the National Superconducting Cyclotron Laboratory we have measured the Q values of the fourth-order forbidden β decay and electron capture of V50 and the double electron capture Q value of Cr50 with the results Qβ(V50)=1038.1(1) keV, QEC(V50)=2208.7(1) keV, and Q2EC(Cr50)=1170.5(1) keV. In addition, we have measured the atomic masses of Ti46,47,49,50,V50,51, and Cr50,52-54, reducing uncertainties by factors of up to three compared with the most recent atomic mass evaluation (Ame2016) [Chin. Phys. C 41, 030003 (2017)1674-113710.1088/1674-1137/41/3/030003]. Our results are in good agreement with Ame2016 for Ti46,47,49,50 and Cr50,54 and show deviations of up to ∼1keV(2.5σ) for V50,51 and Cr50,54.

Original languageEnglish
Article number044321
JournalPhysical Review C
Volume96
Issue number4
DOIs
StatePublished - Oct 20 2017

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