In-beam study of the level structure of 122Te

Abstract

The level structure of 122Te has been studied using the 120Sn(α, 2n) reaction at beam energies of 18 and 24 MeV. Standard in-beam γ-ray spectroscopy measurements of excitation functions, γγ-coincidences, and γ-ray angular distributions were performed. A level scheme up to 3995 keV in excitation was constructed and spin-parity values up to 12 + were assigned to almost all of the states. The identification of several new levels and the first in-beam observation of the excited 0 + state at 1357.4 keV are discussed. The low-lying excitations are examined in the context of coexisting structures of collective, single-particle, and particle-hole intruder excitations.