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Title: Rotational bands in /sup 133/Ce

Abstract

Several rotational bands built on one- and three-quasiparticle configurations have been populated in the odd-neutron /sup 133/Ce nucleus following the /sup 119/Sn(/sup 18/O,4n) reaction. Both signature components of bands built on the (514)(9/2/sup -/ and (400)(1/2/sup +/ orbitals were observed. At low spins, the yrast band, based on a neutron from the upper h/sub 11/2/ midshell, shows a large signature splitting (>100 keV), indicating a significant triaxial deformation (..gamma..approx.-20/sup 0/). Four ..delta..I = 1 bands were observed at higher spins based on three-quasiparticle configurations. Strong M1 transitions and the lack of signature splitting imply that these bands are near prolate (..gamma..approx.0/sup 0/) and thus contain one or more aligned h/sub 11/2/ protons from the lower midshell. In two of these bands, weak E2 crossover transitions were seen; measured B(M1;I..-->..I-1)/B(E2;I..-->..I-2) ratios were used to assign configurations. In addition, a ..delta..I = 2 band with an enhanced moment of inertia was observed most probably built on the prolate ..nu..i/sub 13/2/x(..pi..h/sub 11/2/)/sup 2/ configuration. Only one signature component of this configuration was seen because of the maximal signature splitting of the ..beta..-driving i/sub 13/2/ neutron orbital (..cap omega.. = (1/2).

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
OSTI Identifier:
5659942
Resource Type:
Journal Article
Journal Name:
Phys. Rev. C; (United States)
Additional Journal Information:
Journal Volume: 36:6
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CERIUM 133; E2-TRANSITIONS; M1-TRANSITIONS; ROTATIONAL STATES; COMPOUND-NUCLEUS REACTIONS; MOMENT OF INERTIA; MULTIPLICITY; NEUTRONS; OXYGEN 18 REACTIONS; YRAST STATES; BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CERIUM ISOTOPES; CHARGED-PARTICLE REACTIONS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; EVEN-ODD NUCLEI; EXCITED STATES; FERMIONS; HADRONS; HEAVY ION REACTIONS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; ISOTOPES; MULTIPOLE TRANSITIONS; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; RADIOISOTOPES; RARE EARTH ISOTOPES; RARE EARTH NUCLEI; 651720* - Nuclear Properties & Reactions, A=90-149, Experimental

Citation Formats

Ma, R, Paul, E S, Beausang, C W, Shi, S, Xu, N, and Fossan, D B. Rotational bands in /sup 133/Ce. United States: N. p., 1987. Web. doi:10.1103/PhysRevC.36.2322.
Ma, R, Paul, E S, Beausang, C W, Shi, S, Xu, N, & Fossan, D B. Rotational bands in /sup 133/Ce. United States. https://doi.org/10.1103/PhysRevC.36.2322
Ma, R, Paul, E S, Beausang, C W, Shi, S, Xu, N, and Fossan, D B. Tue . "Rotational bands in /sup 133/Ce". United States. https://doi.org/10.1103/PhysRevC.36.2322.
@article{osti_5659942,
title = {Rotational bands in /sup 133/Ce},
author = {Ma, R and Paul, E S and Beausang, C W and Shi, S and Xu, N and Fossan, D B},
abstractNote = {Several rotational bands built on one- and three-quasiparticle configurations have been populated in the odd-neutron /sup 133/Ce nucleus following the /sup 119/Sn(/sup 18/O,4n) reaction. Both signature components of bands built on the (514)(9/2/sup -/ and (400)(1/2/sup +/ orbitals were observed. At low spins, the yrast band, based on a neutron from the upper h/sub 11/2/ midshell, shows a large signature splitting (>100 keV), indicating a significant triaxial deformation (..gamma..approx.-20/sup 0/). Four ..delta..I = 1 bands were observed at higher spins based on three-quasiparticle configurations. Strong M1 transitions and the lack of signature splitting imply that these bands are near prolate (..gamma..approx.0/sup 0/) and thus contain one or more aligned h/sub 11/2/ protons from the lower midshell. In two of these bands, weak E2 crossover transitions were seen; measured B(M1;I..-->..I-1)/B(E2;I..-->..I-2) ratios were used to assign configurations. In addition, a ..delta..I = 2 band with an enhanced moment of inertia was observed most probably built on the prolate ..nu..i/sub 13/2/x(..pi..h/sub 11/2/)/sup 2/ configuration. Only one signature component of this configuration was seen because of the maximal signature splitting of the ..beta..-driving i/sub 13/2/ neutron orbital (..cap omega.. = (1/2).},
doi = {10.1103/PhysRevC.36.2322},
url = {https://www.osti.gov/biblio/5659942}, journal = {Phys. Rev. C; (United States)},
number = ,
volume = 36:6,
place = {United States},
year = {1987},
month = {12}
}