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Title: Scissors mode of Gd nuclei studied from resonance neutron capture

Abstract

Spectra of {gamma} rays following the neutron capture at isolated resonances of stable Gd nuclei were measured. The objectives were to get new information on photon strength of {sup 153,155-159}Gd with emphasis on the role of the M1 scissors-mode vibration. An analysis of the data obtained clearly indicates that the scissors mode is coupled not only to the ground state, but also to all excited levels of the nuclei studied. The specificity of our approach ensures unbiasedness in estimating the sumed scissors-mode strength {Sigma}B(M1){up_arrow}, even for odd product nuclei, for which conventional nuclear resonance fluorescence measurements yield only limited information. Our analysis indicates that for these nuclei the sum {Sigma}B(M1){up_arrow} increases with A and for {sup 157,159}Gd it is significantly higher compared to {sup 156,158}Gd.

Authors:
; ;  [1];  [2];
  1. Charles University in Prague, CZ-180 00 Prague 8 (Czech Republic)
  2. (United States) and Triangle Universities Nuclear Laboratory, Durham, NC 27708 (United States)
Publication Date:
OSTI Identifier:
22075604
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1491; Journal Issue: 1; Conference: Conference on nuclear structure and dynamics 2012, Opatija (Croatia), 9-13 Jul 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CAPTURE; GADOLINIUM 153; GADOLINIUM 158; GADOLINIUM 159; GAMMA SPECTRA; GROUND STATES; M1-TRANSITIONS; NEUTRON REACTIONS; PHOTONS; RESONANCE FLUORESCENCE; RESONANCE NEUTRONS; SCISSION-POINT MODEL; STRENGTH FUNCTIONS; VIBRATIONAL STATES

Citation Formats

Kroll, J., Baramsai, B., Becker, J. A., North Carolina State University, Raleigh, NC 27695, and and others. Scissors mode of Gd nuclei studied from resonance neutron capture. United States: N. p., 2012. Web. doi:10.1063/1.4764235.
Kroll, J., Baramsai, B., Becker, J. A., North Carolina State University, Raleigh, NC 27695, & and others. Scissors mode of Gd nuclei studied from resonance neutron capture. United States. doi:10.1063/1.4764235.
Kroll, J., Baramsai, B., Becker, J. A., North Carolina State University, Raleigh, NC 27695, and and others. Sat . "Scissors mode of Gd nuclei studied from resonance neutron capture". United States. doi:10.1063/1.4764235.
@article{osti_22075604,
title = {Scissors mode of Gd nuclei studied from resonance neutron capture},
author = {Kroll, J. and Baramsai, B. and Becker, J. A. and North Carolina State University, Raleigh, NC 27695 and and others},
abstractNote = {Spectra of {gamma} rays following the neutron capture at isolated resonances of stable Gd nuclei were measured. The objectives were to get new information on photon strength of {sup 153,155-159}Gd with emphasis on the role of the M1 scissors-mode vibration. An analysis of the data obtained clearly indicates that the scissors mode is coupled not only to the ground state, but also to all excited levels of the nuclei studied. The specificity of our approach ensures unbiasedness in estimating the sumed scissors-mode strength {Sigma}B(M1){up_arrow}, even for odd product nuclei, for which conventional nuclear resonance fluorescence measurements yield only limited information. Our analysis indicates that for these nuclei the sum {Sigma}B(M1){up_arrow} increases with A and for {sup 157,159}Gd it is significantly higher compared to {sup 156,158}Gd.},
doi = {10.1063/1.4764235},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1491,
place = {United States},
year = {2012},
month = {10}
}