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Title: Experimentally constrained ( p , γ ) Y 89 and ( n , γ ) Y 89 reaction rates relevant to p -process nucleosynthesis

Abstract

The nuclear level density and the g-ray strength function have been extracted for 89Y, using the Oslo Method on 89Y(p,p'γ) 89Y coincidence data. The g-ray strength function displays a low-energy enhancement consistent with previous observations in this mass region ( 93-98Mo). Shell-model calculations give support that the observed enhancement is due to strong, low-energy M1 transitions at high excitation energies. The data were further used as input for calculations of the 88Sr(p,γ) 89Y and 88Y(n,γ) 89Y cross sections with the TALYS reaction code. Lastly, comparison with cross-section data, where available, as well as with values from the BRUSLIB library, shows a satisfying agreement.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [1];  [6];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [6] more »;  [7] « less
  1. Univ. of Oslo, Oslo (Norway)
  2. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. Libre de Bruxelles, Brussels (Belgium)
  5. NCSR "Demokritos", Athens (Greece)
  6. Ohio Univ., Athens, OH (United States)
  7. iThemba LABS, Somerset West (South Africa)
Publication Date:
Research Org.:
Ohio Univ., Athens, OH (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1338920
Alternate Identifier(s):
OSTI ID: 1357364
Report Number(s):
LLNL-JRNL-678709
Journal ID: ISSN 2469-9985; PRVCAN
Grant/Contract Number:  
NA0002905; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear level density; gamma-strength functions; astrophysical reaction rates

Citation Formats

Larsen, A. C., Guttormsen, M., Schwengner, R., Bleuel, D. L., Goriely, S., Harissopulos, S., Bello Garrote, F. L., Byun, Y., Eriksen, T. K., Giacoppo, F., Gorgen, A., Hagen, T. W., Klintefjord, M., Renstrom, T., Rose, S. J., Sahin, E., Siem, S., Tornyi, T. G., Tveten, G. M., Voinov, A. V., and Wiedeking, M. Experimentally constrained (p,γ)Y89 and (n,γ)Y89 reaction rates relevant to p -process nucleosynthesis. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.93.045810.
Larsen, A. C., Guttormsen, M., Schwengner, R., Bleuel, D. L., Goriely, S., Harissopulos, S., Bello Garrote, F. L., Byun, Y., Eriksen, T. K., Giacoppo, F., Gorgen, A., Hagen, T. W., Klintefjord, M., Renstrom, T., Rose, S. J., Sahin, E., Siem, S., Tornyi, T. G., Tveten, G. M., Voinov, A. V., & Wiedeking, M. Experimentally constrained (p,γ)Y89 and (n,γ)Y89 reaction rates relevant to p -process nucleosynthesis. United States. doi:10.1103/PhysRevC.93.045810.
Larsen, A. C., Guttormsen, M., Schwengner, R., Bleuel, D. L., Goriely, S., Harissopulos, S., Bello Garrote, F. L., Byun, Y., Eriksen, T. K., Giacoppo, F., Gorgen, A., Hagen, T. W., Klintefjord, M., Renstrom, T., Rose, S. J., Sahin, E., Siem, S., Tornyi, T. G., Tveten, G. M., Voinov, A. V., and Wiedeking, M. Thu . "Experimentally constrained (p,γ)Y89 and (n,γ)Y89 reaction rates relevant to p -process nucleosynthesis". United States. doi:10.1103/PhysRevC.93.045810. https://www.osti.gov/servlets/purl/1338920.
@article{osti_1338920,
title = {Experimentally constrained (p,γ)Y89 and (n,γ)Y89 reaction rates relevant to p -process nucleosynthesis},
author = {Larsen, A. C. and Guttormsen, M. and Schwengner, R. and Bleuel, D. L. and Goriely, S. and Harissopulos, S. and Bello Garrote, F. L. and Byun, Y. and Eriksen, T. K. and Giacoppo, F. and Gorgen, A. and Hagen, T. W. and Klintefjord, M. and Renstrom, T. and Rose, S. J. and Sahin, E. and Siem, S. and Tornyi, T. G. and Tveten, G. M. and Voinov, A. V. and Wiedeking, M.},
abstractNote = {The nuclear level density and the g-ray strength function have been extracted for 89Y, using the Oslo Method on 89Y(p,p'γ)89Y coincidence data. The g-ray strength function displays a low-energy enhancement consistent with previous observations in this mass region (93-98Mo). Shell-model calculations give support that the observed enhancement is due to strong, low-energy M1 transitions at high excitation energies. The data were further used as input for calculations of the 88Sr(p,γ)89Y and 88Y(n,γ)89Y cross sections with the TALYS reaction code. Lastly, comparison with cross-section data, where available, as well as with values from the BRUSLIB library, shows a satisfying agreement.},
doi = {10.1103/PhysRevC.93.045810},
journal = {Physical Review C},
number = 4,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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