Investigation of antimagnetic rotation in ¹⁰¹Pd

Abstract

Excited states in the 101Pd isotope were investigated following the 75As(31P, )101Pd reaction at Elab = 125 MeV. In-beam γ-ray measurements were performed using the Indian National Gamma Array (INGA) spectrometer consisting of 21 Compton-suppressed clover detectors. Level lifetimes have been measured for the negative-parity band in 101Pd using the Doppler-shift attenuation method up to the 43/2− state and are found to differ substantially from the recently reported values. The deduced quadrupole transition rates exhibit a monotonically decreasing behaviour with increasing angular momentum in the spin range along with large / values (>300 ). Using the semiclassical particle-rotor model, the observed band characteristics are interpreted as antimagnetic rotation based on the ⨂ configuration. The configuration assignment is also favoured by the cranking shell model calculations.