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Title: Proton capture reaction cross section measurements on Er 162 as a probe of statistical model calculations

Abstract

It is crucial to measure reaction cross sections relevant to the astrophysical γ process so that theoretical reaction rates can be tested and validated with experimental data. Here, the total cross sections for the 162Er(p,γ) 163Tm and the 162Er(p,n) 162Tm reactions have been measured by the activation method in center-of-mass energies from 3.973 to 8.944 MeV and from 5.962 to 8.944 MeV, respectively. The nucleus 162Er is the heaviest p nuclide to be measured by the activation method using γ -ray spectroscopy, so far. It is important to note that the energy range for the (p,γ) reaction measurement covers a large fraction of the astrophysically relevant energy region between 2.71 and 5.34 MeV. The targets were prepared by evaporating 28.2 % isotopically enriched 162Er 2 O 3 powder onto carbon backing foils, and bombarded with proton beams provided by the FN Tandem Accelerator at the University of Notre Dame. The reaction yields have been determined by the observed activity of produced radioactive isotopes, which was detected offline by a high-purity germanium detector. The results are presented and compared with calculations from two statistical model codes: NON-SMOKER and TALYS.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [3];  [3];  [5];  [5];  [5];  [6]
  1. Kocaeli Univ. (Turkey). Dept. of Physics; Univ. of Notre Dame, IN (United States). Dept. of Physics
  2. Kocaeli Univ. (Turkey). Dept. of Physics
  3. Univ. of Notre Dame, IN (United States). Dept. of Physics
  4. Univ. of Notre Dame, IN (United States). Dept. of Physics; Goethe Univ., Frankfurt (Germany). Inst. of Applied Physics
  5. MTA Atomki, Debrecen (Hungary)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Scientific and Technological Research Council of Turkey (TUBITAK); National Science Foundation (NSF); Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics-Center for the Evolution of the Elements (JINA-CEE); German Research Foundation (DFG); Hungarian Scientific Research Fund (OTKA); Helmholtz International Center for FAIR (HIC for FAIR), Frankfurt (Germany)
OSTI Identifier:
1462746
Grant/Contract Number:  
AC02-06CH11357; 108T508; 109T585; 2007/36; 0434844; PHY02-16783; K108459; K120666; SO907/2-1
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear astrophysics; nucleon induced nuclear reactions; nucleosynthesis in explosive environments; radiative capture; 150 ≤ A ≤ 189

Citation Formats

Ozkan, N., Guray, R. T., Yalcin, C., Tan, W. P., Aprahamian, A., Beard, M., deBoer, R. J., Almaraz-Calderon, S., Falahat, S., Gorres, J., Li, Q., Sauerwein, A., Sonnabend, K., Wiescher, M., Fulop, Zs., Gyurky, Gy., Somorjai, E., and Greene, J. Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.96.045805.
Ozkan, N., Guray, R. T., Yalcin, C., Tan, W. P., Aprahamian, A., Beard, M., deBoer, R. J., Almaraz-Calderon, S., Falahat, S., Gorres, J., Li, Q., Sauerwein, A., Sonnabend, K., Wiescher, M., Fulop, Zs., Gyurky, Gy., Somorjai, E., & Greene, J. Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations. United States. doi:10.1103/PhysRevC.96.045805.
Ozkan, N., Guray, R. T., Yalcin, C., Tan, W. P., Aprahamian, A., Beard, M., deBoer, R. J., Almaraz-Calderon, S., Falahat, S., Gorres, J., Li, Q., Sauerwein, A., Sonnabend, K., Wiescher, M., Fulop, Zs., Gyurky, Gy., Somorjai, E., and Greene, J. Tue . "Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations". United States. doi:10.1103/PhysRevC.96.045805. https://www.osti.gov/servlets/purl/1462746.
@article{osti_1462746,
title = {Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations},
author = {Ozkan, N. and Guray, R. T. and Yalcin, C. and Tan, W. P. and Aprahamian, A. and Beard, M. and deBoer, R. J. and Almaraz-Calderon, S. and Falahat, S. and Gorres, J. and Li, Q. and Sauerwein, A. and Sonnabend, K. and Wiescher, M. and Fulop, Zs. and Gyurky, Gy. and Somorjai, E. and Greene, J.},
abstractNote = {It is crucial to measure reaction cross sections relevant to the astrophysical γ process so that theoretical reaction rates can be tested and validated with experimental data. Here, the total cross sections for the 162Er(p,γ) 163Tm and the 162Er(p,n) 162Tm reactions have been measured by the activation method in center-of-mass energies from 3.973 to 8.944 MeV and from 5.962 to 8.944 MeV, respectively. The nucleus 162Er is the heaviest p nuclide to be measured by the activation method using γ -ray spectroscopy, so far. It is important to note that the energy range for the (p,γ) reaction measurement covers a large fraction of the astrophysically relevant energy region between 2.71 and 5.34 MeV. The targets were prepared by evaporating 28.2 % isotopically enriched 162Er2 O3 powder onto carbon backing foils, and bombarded with proton beams provided by the FN Tandem Accelerator at the University of Notre Dame. The reaction yields have been determined by the observed activity of produced radioactive isotopes, which was detected offline by a high-purity germanium detector. The results are presented and compared with calculations from two statistical model codes: NON-SMOKER and TALYS.},
doi = {10.1103/PhysRevC.96.045805},
journal = {Physical Review C},
number = 4,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}

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