Quenching of the $N=32$ neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

Quenching of the $N = 32$ neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

M. P. Reiter et al.

Phys. Rev. C 98, 024310 – Published 15 August 2018

Abstract

We performed the first direct mass measurements of neutron-rich vanadium ${}^{52 - 55}V$ isotopes passing the $N = 32$ neutron shell closure with TRIUMF's Ion Trap for Atomic and Nuclear science. The new direct measurements confirm all previous indirect results. Through a reduced uncertainty of the mass of ${}^{55}V$ we confirm the quenching of the $N = 32$ neutron shell closure in vanadium. We discuss the evolution of the $N = 32$ neutron shell closure between K and Cr and show similar signatures in the half-life surface when studied along the isotopic chains.