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Title: High-spin states in {sup 135}Xe

Abstract

The high-spin structure of the {sup 135}Xe isotope was studied via prompt {gamma}-ray spectroscopy in two different experiments: (i) as a fission fragment following the fission of the {sup 226}Th compound nucleus formed in a fusion-fission reaction and (ii) as an evaporation residue in the {sub 136}Xe(n,2n{gamma}){sup 135}Xe reaction. The level scheme above the previously known 11/2{sup -} isomer was established up to 3170-keV excitation energy. A strong sequence has been firmly assigned to {sup 135}Xe and forms the yrast decay path including the (15/2{sup -}) and (19/2{sup -}) states. A much weaker sequence of {gamma} rays has been observed and tentatively assigned to {sup 135}Xe and is a candidate for the off-yrast sequence that includes the (13/2{sup -}) and (17/2{sup -}) states, expected in the weak coupling of the h{sub 11/2} neutron to the even-A core. The experimental results are compared with predictions from shell-model calculations.

Authors:
; ;  [1];  [2]; ;  [3];  [4]; ; ; ;  [5]; ;  [6]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States)
  3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  4. Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching (Germany)
  5. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  6. C.E.A., DAM Ile-de-France, DPTA/Service de Physique Nucleaire, BP 12, F-91680 Bruyeres-le-Chatel (France)
Publication Date:
OSTI Identifier:
20995284
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.054322; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COMPOUND NUCLEI; EVAPORATION; EXCITATION; FISSION; FISSION FRAGMENTS; FISSION PRODUCTS; GAMMA RADIATION; GAMMA SPECTRA; GAMMA SPECTROSCOPY; HIGH SPIN STATES; KEV RANGE; MASS NUMBER; NEUTRONS; SHELL MODELS; SPIN; THORIUM 226; XENON 135; YRAST STATES

Citation Formats

Fotiades, N., Nelson, R. O., Devlin, M., Cizewski, J. A., Becker, J. A., Younes, W., Kruecken, R., Clark, R. M., Fallon, P., Lee, I. Y., Macchiavelli, A. O., Ethvignot, T., and Granier, T. High-spin states in {sup 135}Xe. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.054322.
Fotiades, N., Nelson, R. O., Devlin, M., Cizewski, J. A., Becker, J. A., Younes, W., Kruecken, R., Clark, R. M., Fallon, P., Lee, I. Y., Macchiavelli, A. O., Ethvignot, T., & Granier, T. High-spin states in {sup 135}Xe. United States. doi:10.1103/PHYSREVC.75.054322.
Fotiades, N., Nelson, R. O., Devlin, M., Cizewski, J. A., Becker, J. A., Younes, W., Kruecken, R., Clark, R. M., Fallon, P., Lee, I. Y., Macchiavelli, A. O., Ethvignot, T., and Granier, T. Tue . "High-spin states in {sup 135}Xe". United States. doi:10.1103/PHYSREVC.75.054322.
@article{osti_20995284,
title = {High-spin states in {sup 135}Xe},
author = {Fotiades, N. and Nelson, R. O. and Devlin, M. and Cizewski, J. A. and Becker, J. A. and Younes, W. and Kruecken, R. and Clark, R. M. and Fallon, P. and Lee, I. Y. and Macchiavelli, A. O. and Ethvignot, T. and Granier, T.},
abstractNote = {The high-spin structure of the {sup 135}Xe isotope was studied via prompt {gamma}-ray spectroscopy in two different experiments: (i) as a fission fragment following the fission of the {sup 226}Th compound nucleus formed in a fusion-fission reaction and (ii) as an evaporation residue in the {sub 136}Xe(n,2n{gamma}){sup 135}Xe reaction. The level scheme above the previously known 11/2{sup -} isomer was established up to 3170-keV excitation energy. A strong sequence has been firmly assigned to {sup 135}Xe and forms the yrast decay path including the (15/2{sup -}) and (19/2{sup -}) states. A much weaker sequence of {gamma} rays has been observed and tentatively assigned to {sup 135}Xe and is a candidate for the off-yrast sequence that includes the (13/2{sup -}) and (17/2{sup -}) states, expected in the weak coupling of the h{sub 11/2} neutron to the even-A core. The experimental results are compared with predictions from shell-model calculations.},
doi = {10.1103/PHYSREVC.75.054322},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}