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Title: Capture cross sections on unstable nuclei

Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to measure due to the fact that the measurements require both highly radioactive samples and intense neutron sources. Essential ingredients for describing the γ decays following neutron capture are the γ-ray strength function and level densities. We will compare different indirect approaches for obtaining the most relevant observables that can constrain Hauser-Feshbach statistical-model calculations of capture cross sections. Specifically, we will consider photon scattering using monoenergetic and 100% linearly polarized photon beams. Here, challenges that exist on the path to obtaining neutron-capture cross sections for reactions on isotopes near and far from stability will be discussed.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [9] ;  [10] ;  [10] ;  [11] ;  [11] ;  [11] ;  [12] more »;  [13] « less
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Surrey, Guildford (United Kingdom); Yale Univ., New Haven, CT (United States)
  3. Yale Univ., New Haven, CT (United States)
  4. Univ. of Surrey, Guildford (United Kingdom)
  5. Yale Univ., New Haven, CT (United States); TU Darmstadt, Darmstadt (Germany)
  6. Duke Univ., Durham, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. North Carolina State Univ., Raleigh, NC (United States)
  9. TU Darmstadt, Darmstadt (Germany)
  10. ExtreMe Matter Institute and Research Div., Darmstadt (Germany)
  11. Univ. of Kentucky, Lexington, KY (United States)
  12. Univ. GieBen, GieBen (Germany)
  13. Univ. Libre de Bruxelles, Brussels (Belgium)
Publication Date:
Report Number(s):
LLNL-JRNL-705161
Journal ID: ISSN 2100-014X
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 146; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1404838

Tonchev, A. P., Escher, J. E., Scielzo, N., Bedrossian, P., Ilieva, R. S., Humby, P., Cooper, N., Goddard, P. M., Werner, V., Tornow, W., Rusev, G., Kelley, J. H., Pietralla, N., Scheck, M., Savran, D., Loher, B., Yates, S. W., Crider, B. P., Peters, E. E., Tsoneva, N., and Goriely, S.. Capture cross sections on unstable nuclei. United States: N. p., Web. doi:10.1051/epjconf/201714601013.
Tonchev, A. P., Escher, J. E., Scielzo, N., Bedrossian, P., Ilieva, R. S., Humby, P., Cooper, N., Goddard, P. M., Werner, V., Tornow, W., Rusev, G., Kelley, J. H., Pietralla, N., Scheck, M., Savran, D., Loher, B., Yates, S. W., Crider, B. P., Peters, E. E., Tsoneva, N., & Goriely, S.. Capture cross sections on unstable nuclei. United States. doi:10.1051/epjconf/201714601013.
Tonchev, A. P., Escher, J. E., Scielzo, N., Bedrossian, P., Ilieva, R. S., Humby, P., Cooper, N., Goddard, P. M., Werner, V., Tornow, W., Rusev, G., Kelley, J. H., Pietralla, N., Scheck, M., Savran, D., Loher, B., Yates, S. W., Crider, B. P., Peters, E. E., Tsoneva, N., and Goriely, S.. 2017. "Capture cross sections on unstable nuclei". United States. doi:10.1051/epjconf/201714601013. https://www.osti.gov/servlets/purl/1404838.
@article{osti_1404838,
title = {Capture cross sections on unstable nuclei},
author = {Tonchev, A. P. and Escher, J. E. and Scielzo, N. and Bedrossian, P. and Ilieva, R. S. and Humby, P. and Cooper, N. and Goddard, P. M. and Werner, V. and Tornow, W. and Rusev, G. and Kelley, J. H. and Pietralla, N. and Scheck, M. and Savran, D. and Loher, B. and Yates, S. W. and Crider, B. P. and Peters, E. E. and Tsoneva, N. and Goriely, S.},
abstractNote = {Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to measure due to the fact that the measurements require both highly radioactive samples and intense neutron sources. Essential ingredients for describing the γ decays following neutron capture are the γ-ray strength function and level densities. We will compare different indirect approaches for obtaining the most relevant observables that can constrain Hauser-Feshbach statistical-model calculations of capture cross sections. Specifically, we will consider photon scattering using monoenergetic and 100% linearly polarized photon beams. Here, challenges that exist on the path to obtaining neutron-capture cross sections for reactions on isotopes near and far from stability will be discussed.},
doi = {10.1051/epjconf/201714601013},
journal = {EPJ Web of Conferences},
number = ,
volume = 146,
place = {United States},
year = {2017},
month = {9}
}