Rotational bands in /sup 133/Ce

doi:https://doi.org/10.1103/PhysRevC.36.2322

Title: Rotational bands in /sup 133/Ce

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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:: Ma, R; Paul, E S; Beausang, C W; Shi, S; Xu, N; Fossan, D B

Publication Date:: 1987-12-01

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.

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                    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

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                    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.

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@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}

}

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