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Title: Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering

Abstract

High energy {gamma} rays from the decay of the giant resonance in hot {sup 120}Sn nuclei were measured in the excitation energy range of 30{endash}130 MeV. The excited nuclei were populated by inelastic scattering of {alpha} particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to {approximately}12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature. {copyright} {ital 1996 The American Physical Society.}

Authors:
; ; ; ; ; ;  [1]; ; ; ; ;  [2]; ; ; ;  [3]
  1. National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory
OSTI Identifier:
286147
DOE Contract Number:  
AC05-84OR21400; FG02-88ER40406; FG02-87ER40316
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 76; Journal Issue: 12; Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; TIN 120; GIANT RESONANCE; ALPHA REACTIONS; INELASTIC SCATTERING; DIPOLES; EXCITED STATES; GAMMA RADIATION; EXCITATION; ANGULAR MOMENTUM; FLUCTUATIONS

Citation Formats

Ramakrishnan, E., Baumann, T., Azhari, A., Kryger, R.A., Pfaff, R., Thoennesen, M., Yokoyama, S., Beene, J.R., Halbert, M.L., Mueller, P.E., Stracener, D.W., Varner, R.L., Charity, R.J., Dempsey, J.F., Sarantites, D.G., and Sobotka, L.G.. Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering. United States: N. p., 1996. Web. doi:10.1103/PhysRevLett.76.2025.
Ramakrishnan, E., Baumann, T., Azhari, A., Kryger, R.A., Pfaff, R., Thoennesen, M., Yokoyama, S., Beene, J.R., Halbert, M.L., Mueller, P.E., Stracener, D.W., Varner, R.L., Charity, R.J., Dempsey, J.F., Sarantites, D.G., & Sobotka, L.G.. Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering. United States. doi:10.1103/PhysRevLett.76.2025.
Ramakrishnan, E., Baumann, T., Azhari, A., Kryger, R.A., Pfaff, R., Thoennesen, M., Yokoyama, S., Beene, J.R., Halbert, M.L., Mueller, P.E., Stracener, D.W., Varner, R.L., Charity, R.J., Dempsey, J.F., Sarantites, D.G., and Sobotka, L.G.. Fri . "Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering". United States. doi:10.1103/PhysRevLett.76.2025.
@article{osti_286147,
title = {Giant dipole resonance built on highly excited states of {sup 120}Sn nuclei populated by inelastic {alpha} scattering},
author = {Ramakrishnan, E. and Baumann, T. and Azhari, A. and Kryger, R.A. and Pfaff, R. and Thoennesen, M. and Yokoyama, S. and Beene, J.R. and Halbert, M.L. and Mueller, P.E. and Stracener, D.W. and Varner, R.L. and Charity, R.J. and Dempsey, J.F. and Sarantites, D.G. and Sobotka, L.G.},
abstractNote = {High energy {gamma} rays from the decay of the giant resonance in hot {sup 120}Sn nuclei were measured in the excitation energy range of 30{endash}130 MeV. The excited nuclei were populated by inelastic scattering of {alpha} particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to {approximately}12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevLett.76.2025},
journal = {Physical Review Letters},
number = 12,
volume = 76,
place = {United States},
year = {1996},
month = {3}
}