Investigation of antimagnetic rotation in 101Pd. (6th June 2017)

• Record Type: Journal Article
• Authors: Singh, V; Sihotra, S; Roy, S; Kaur, M; Saha, S; Sethi, J; Palit, R; Singh, N; Malik, S S; Jain, H C; Mehta, D
• Is Part Of: Journal of physics. Volume 44:Number 7(2017:Jul.)
• Publication Date: 2017-06-06
• Subjects: γ-γ coincidence -- fusion-evaporation reaction -- lifetime measurements -- semiclassical particle rotor model calculations -- cranking shell model calculations; 21.10.Tg -- 23.20.Lv -- 27.60.+j; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/aa718a
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: Excited states in the 101 Pd isotope were investigated following the 75 As( 31 P, 2 p 3 n ) 101 Pd reaction at E lab = 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 ν h 11 / 2 band in 101 Pd 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 31 / 2 ℏ ≤ I ≤ 43 / 2 ℏ along with large I ( 2 ) / B ( E 2 ) values (>300 ℏ 2 MeV − 1 ( eb ) − 2 ). Using the semiclassical particle-rotor model, the observed band characteristics are interpreted as antimagnetic rotation based on the π ( g 9 / 2 ) − 2 ⨂ ν [ h 11 / 2 ( g 7 / 2 ) 2 ] configuration. The configuration assignment is also favoured by the cranking shell model calculations.