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Title: High-spin structure of {sup 82}Y

Abstract

The high-spin states of {sup 82}Y have been studied up to an excitation energy {similar_to}10 MeV and a spin of 23{h_bar} through the {sup 58}Ni({sup 27}Al,2{ital pn}){sup 82}Y reaction using 92 MeV {sup 27}Al beam and in-beam {gamma}-ray spectroscopic techniques. The electromagnetic properties and the structure of high-spin states in the positive parity band and the negative parity band have been investigated through a measurement of several new lifetimes. The experimentally obtained transition quadrupole moments exhibit a transition from a near spherical shape with {ital Q}{sub {ital t}}{similar_to}0.6 eb to a deformed shape with {ital Q}{sub {ital t}}{similar_to}2.1 eb around a spin {ital I}{similar_to}9{h_bar} for the positive and negative parity bands and are in reasonable agreement with those calculated using deformation parameters ({beta},{gamma}) as predicted by the total Routhian surface calculations. The observed signature splitting, quasiparticle alignments, the kinematic, and dynamic moment of inertias as a function of rotational frequency {h_bar}{omega} or spin I have been discussed within the framework of the cranked shell model and the projected Hartree-Fock calculations. The experimental and theoretical results indicate the two neutron alignment at {h_bar}{omega}{similar_to}0.66 MeV in the positive parity band. The observed band-crossing frequency {h_bar}{omega}{similar_to}0.67 MeV in the negative parity band alsomore » indicates two neutron alignment.« less

Authors:
; ; ; ;  [1]
  1. Tata Institute of Fundamental Research, Bombay 400 005 (India)
Publication Date:
OSTI Identifier:
55138
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 51; Journal Issue: 6; Other Information: PBD: Jun 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; YTTRIUM 82; HIGH SPIN STATES; EXCITATION; ENERGY; IN-BEAM SPECTROSCOPY; GAMMA RADIATION; PARITY; LIFETIME; E2-TRANSITIONS; M2-TRANSITIONS; DEFORMATION; MOMENT OF INERTIA; CRANKING MODEL; SHELL MODELS; HARTREE-FOCK METHOD; NEUTRONS; ALIGNMENT; NICKEL 58 TARGET; ALUMINIUM 27 REACTIONS

Citation Formats

Paul, S D, Jain, H C, Chattopadhyay, S, Jhingan, M L, and Sheikh, J A. High-spin structure of {sup 82}Y. United States: N. p., 1995. Web. doi:10.1103/PhysRevC.51.2959.
Paul, S D, Jain, H C, Chattopadhyay, S, Jhingan, M L, & Sheikh, J A. High-spin structure of {sup 82}Y. United States. https://doi.org/10.1103/PhysRevC.51.2959
Paul, S D, Jain, H C, Chattopadhyay, S, Jhingan, M L, and Sheikh, J A. Thu . "High-spin structure of {sup 82}Y". United States. https://doi.org/10.1103/PhysRevC.51.2959.
@article{osti_55138,
title = {High-spin structure of {sup 82}Y},
author = {Paul, S D and Jain, H C and Chattopadhyay, S and Jhingan, M L and Sheikh, J A},
abstractNote = {The high-spin states of {sup 82}Y have been studied up to an excitation energy {similar_to}10 MeV and a spin of 23{h_bar} through the {sup 58}Ni({sup 27}Al,2{ital pn}){sup 82}Y reaction using 92 MeV {sup 27}Al beam and in-beam {gamma}-ray spectroscopic techniques. The electromagnetic properties and the structure of high-spin states in the positive parity band and the negative parity band have been investigated through a measurement of several new lifetimes. The experimentally obtained transition quadrupole moments exhibit a transition from a near spherical shape with {ital Q}{sub {ital t}}{similar_to}0.6 eb to a deformed shape with {ital Q}{sub {ital t}}{similar_to}2.1 eb around a spin {ital I}{similar_to}9{h_bar} for the positive and negative parity bands and are in reasonable agreement with those calculated using deformation parameters ({beta},{gamma}) as predicted by the total Routhian surface calculations. The observed signature splitting, quasiparticle alignments, the kinematic, and dynamic moment of inertias as a function of rotational frequency {h_bar}{omega} or spin I have been discussed within the framework of the cranked shell model and the projected Hartree-Fock calculations. The experimental and theoretical results indicate the two neutron alignment at {h_bar}{omega}{similar_to}0.66 MeV in the positive parity band. The observed band-crossing frequency {h_bar}{omega}{similar_to}0.67 MeV in the negative parity band also indicates two neutron alignment.},
doi = {10.1103/PhysRevC.51.2959},
url = {https://www.osti.gov/biblio/55138}, journal = {Physical Review, C},
number = 6,
volume = 51,
place = {United States},
year = {1995},
month = {6}
}