Transition probabilities and isospin structure in theN=Znucleus46V

Abstract

Picosecond lifetimes in ${}^{46}\mathrm{V}$ and ${}^{46}\mathrm{Ti}$ were determined using the recoil distance Doppler-shift technique with a plunger device coupled to a setup of five HP Ge detectors enhanced by one EUROBALL CLUSTER detector. The experiment was carried out using the ${}^{32}\mathrm{S}{(}^{16}\mathrm{O},pn)$ reaction at 38 MeV at the Cologne FN TANDEM facility. The differential decay curve method in coincidence mode was employed to derive lifetimes for five excited states in each nucleus. The resulting $E2$ transition probabilities are compared with existing shell model calculations and a comparison within the $T=1$ isospin triplet is given. Absolute $E1$ strengths of the ${2}^{\ensuremath{-}}$ decay in ${}^{46}\mathrm{V}$ are discussed.