In-beam 𝛾-ray spectroscopy of ⁹⁴Ag

A recoil-beta-tagging experiment has been performed to study the excited 𝑇=0 and 𝑇=1 states in the odd–odd 𝑁=𝑍 nucleus ⁹⁴Ag, populated via the ⁴⁰Ca(⁵⁸Ni,1p3n)⁹⁴Ag reaction. The experiment was conducted using the MARA recoil separator and JUROGAM3 array at the Accelerator Laboratory of the University of Jyväskylä. Through correlating fast, high-energy beta decays at the MARA focal plane with prompt 𝛾 rays emitted at the reaction target, a number of transitions between excited states in ⁹⁴Ag have been identified. The timing characteristics of these transitions confirm that they fall within decay sequences that feed the short-lived 𝑇=1 ground state of ⁹⁴Ag. The transitions are proposed to proceed within and between the sets of states with 𝑇=0 and 𝑇=1. Possible correspondence between some of these transitions from analog states in ⁹⁴Pd has been discussed, and shell-model calculations including multipole and monopole electromagnetic effects have been presented, in order to enable predictions of the decay patterns between the 𝑇=0 and 𝑇=1 states and to allow a theoretical set of Coulomb energy differences to be calculated for the 𝐴=94 𝑇=1 analog states.