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Title: Statistical properties of Pu 243 , and Pu 242 ( n , γ ) cross section calculation

Abstract

The level density and γ-ray strength function (γSF) of 243Pu have been measured in the quasicontinuum using the Oslo method. Excited states in 243Pu were populated using the 242Pu(d,p) reaction. The level density closely follows the constant-temperature level density formula for excitation energies above the pairing gap. The γSF displays a double-humped resonance at low energy as also seen in previous investigations of actinide isotopes. The structure is interpreted as the scissors resonance and has a centroid of ω SR = 2.42(5) MeV and a total strength of B SR = 10.1(15) μ 2 N, which is in excellent agreement with sum-rule estimates. Lastly, the measured level density and γSF were used to calculate the 242Pu(n,γ) cross section in a neutron energy range for which there were previously no measured data.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [2];  [2];  [5];  [2];  [2];  [2];  [2];  [2];  [3];  [2];  [6];  [2];  [2] more »;  [2];  [2];  [2];  [7];  [8];  [6];  [3] « less
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Univ. of Oslo, Oslo (Norway)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. of California, Berkeley, CA (United States)
  6. Institut de Physique Nucleaire d'Orsay, Orsay Cedex (France)
  7. Ohio Univ., Athens, OH (United States)
  8. iThemba LABS, Somerset West (South Africa)
Publication Date:
Research Org.:
Ohio Univ., Athens, OH (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
OSTI Identifier:
1338840
Alternate Identifier(s):
OSTI ID: 1236515; OSTI ID: 1430666
Grant/Contract Number:  
NA0002905; W-7405-Eng-48; AC52-07NA27344; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; gamma strength function; pygmy resonance

Citation Formats

Laplace, T. A., Zeiser, F., Guttormsen, M., Larsen, A. C., Bleuel, D. L., Bernstein, L. A., Goldblum, B. L., Siem, S., Garotte, F. L. Bello, Brown, J. A., Campo, L. Crespo, Eriksen, T. K., Giacoppo, F., Gorgen, A., Hadynska-Klek, K., Henderson, R. A., Klintefjord, M., Lebois, M., Renstrom, T., Rose, S. J., Sahin, E., Tornyi, T. G., Tveten, G. M., Voinov, A., Wiedeking, M., Wilson, J. N., and Younes, W. Statistical properties of Pu243 , and Pu242(n,γ) cross section calculation. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.93.014323.
Laplace, T. A., Zeiser, F., Guttormsen, M., Larsen, A. C., Bleuel, D. L., Bernstein, L. A., Goldblum, B. L., Siem, S., Garotte, F. L. Bello, Brown, J. A., Campo, L. Crespo, Eriksen, T. K., Giacoppo, F., Gorgen, A., Hadynska-Klek, K., Henderson, R. A., Klintefjord, M., Lebois, M., Renstrom, T., Rose, S. J., Sahin, E., Tornyi, T. G., Tveten, G. M., Voinov, A., Wiedeking, M., Wilson, J. N., & Younes, W. Statistical properties of Pu243 , and Pu242(n,γ) cross section calculation. United States. doi:10.1103/PhysRevC.93.014323.
Laplace, T. A., Zeiser, F., Guttormsen, M., Larsen, A. C., Bleuel, D. L., Bernstein, L. A., Goldblum, B. L., Siem, S., Garotte, F. L. Bello, Brown, J. A., Campo, L. Crespo, Eriksen, T. K., Giacoppo, F., Gorgen, A., Hadynska-Klek, K., Henderson, R. A., Klintefjord, M., Lebois, M., Renstrom, T., Rose, S. J., Sahin, E., Tornyi, T. G., Tveten, G. M., Voinov, A., Wiedeking, M., Wilson, J. N., and Younes, W. Fri . "Statistical properties of Pu243 , and Pu242(n,γ) cross section calculation". United States. doi:10.1103/PhysRevC.93.014323. https://www.osti.gov/servlets/purl/1338840.
@article{osti_1338840,
title = {Statistical properties of Pu243 , and Pu242(n,γ) cross section calculation},
author = {Laplace, T. A. and Zeiser, F. and Guttormsen, M. and Larsen, A. C. and Bleuel, D. L. and Bernstein, L. A. and Goldblum, B. L. and Siem, S. and Garotte, F. L. Bello and Brown, J. A. and Campo, L. Crespo and Eriksen, T. K. and Giacoppo, F. and Gorgen, A. and Hadynska-Klek, K. and Henderson, R. A. and Klintefjord, M. and Lebois, M. and Renstrom, T. and Rose, S. J. and Sahin, E. and Tornyi, T. G. and Tveten, G. M. and Voinov, A. and Wiedeking, M. and Wilson, J. N. and Younes, W.},
abstractNote = {The level density and γ-ray strength function (γSF) of 243Pu have been measured in the quasicontinuum using the Oslo method. Excited states in 243Pu were populated using the 242Pu(d,p) reaction. The level density closely follows the constant-temperature level density formula for excitation energies above the pairing gap. The γSF displays a double-humped resonance at low energy as also seen in previous investigations of actinide isotopes. The structure is interpreted as the scissors resonance and has a centroid of ωSR = 2.42(5) MeV and a total strength of BSR = 10.1(15) μ2N, which is in excellent agreement with sum-rule estimates. Lastly, the measured level density and γSF were used to calculate the 242Pu(n,γ) cross section in a neutron energy range for which there were previously no measured data.},
doi = {10.1103/PhysRevC.93.014323},
journal = {Physical Review C},
number = 1,
volume = 93,
place = {United States},
year = {2016},
month = {1}
}

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