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Title: Direct neutron capture cross section on Ge 80 and probing shape coexistence in neutron-rich nuclei

Abstract

Results are presented from the first neutron-transfer measurement on 80Ge using an exotic beam from the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. Newly measured spins and spectroscopic factors of low-lying states of 81Ge are determined, and the neutron capture cross section on 80Ge was calculated in a direct-semidirect model to provide a more realistic (n,γ) reaction rate for r-process simulations. Furthermore, a region of shape coexistence around N ≈ 50 is confirmed and implications for the magic nature of 78Ni are discussed.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [4];  [4];  [9];  [10];  [4];  [6];  [5];  [11];  [5];  [12];  [13];  [6] more »;  [5];  [12] « less
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Michigan State Univ., East Lansing, MI (United States); Texas A & M Univ., College Station, TX (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Notre Dame, IN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Rutgers Univ., New Brunswick, NJ (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Louisiana State Univ., Baton Rouge, LA (United States)
  7. Sungkyunkwan Univ., Suwon (Republic of Korea)
  8. Colorado School of Mines, Golden, CO (United States); Univ. of Tennessee, Knoxville, TN (United States)
  9. Rutgers Univ., New Brunswick, NJ (United States); Tennessee Technological Univ., Cookeville, TN (United States)
  10. Tennessee Technological Univ., Cookeville, TN (United States)
  11. Rutgers Univ., New Brunswick, NJ (United States); Univ. of Notre Dame, IN (United States)
  12. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  13. Univ. of Tennessee, Knoxville, TN (United States); Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
Research Org.:
Rutgers Univ., Piscataway, NJ (United States); Univ. of Tennessee, Knoxville, TN (United States); Tennessee Technological Univ., Cookeville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Research Foundation of Korea (NRF)
OSTI Identifier:
1623265
Grant/Contract Number:  
NA0003897; FG02-96ER40983; SC0001174; FG02-96ER40955; AC05-00OR22725; FG02-96ER40978; FG52-08NA28552; NA0002132; PHY-1067806; PHY-1419765
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 100; 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

Citation Formats

Ahn, S., Bardayan, D. W., Jones, K. L., Adekola, A. S., Arbanas, G., Blackmon, J. C., Chae, K. Y., Chipps, K. A., Cizewski, J. A., Hardy, S., Howard, M. E., Kozub, R. L., Manning, B., Matoš, M., Nesaraja, C. D., O'Malley, P. D., Pain, S. D., Peters, W. A., Pittman, S. T., Rasco, B. C., Smith, M. S., and Spassova, I. Direct neutron capture cross section on Ge80 and probing shape coexistence in neutron-rich nuclei. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevC.100.044613.
Ahn, S., Bardayan, D. W., Jones, K. L., Adekola, A. S., Arbanas, G., Blackmon, J. C., Chae, K. Y., Chipps, K. A., Cizewski, J. A., Hardy, S., Howard, M. E., Kozub, R. L., Manning, B., Matoš, M., Nesaraja, C. D., O'Malley, P. D., Pain, S. D., Peters, W. A., Pittman, S. T., Rasco, B. C., Smith, M. S., & Spassova, I. Direct neutron capture cross section on Ge80 and probing shape coexistence in neutron-rich nuclei. United States. https://doi.org/10.1103/PhysRevC.100.044613
Ahn, S., Bardayan, D. W., Jones, K. L., Adekola, A. S., Arbanas, G., Blackmon, J. C., Chae, K. Y., Chipps, K. A., Cizewski, J. A., Hardy, S., Howard, M. E., Kozub, R. L., Manning, B., Matoš, M., Nesaraja, C. D., O'Malley, P. D., Pain, S. D., Peters, W. A., Pittman, S. T., Rasco, B. C., Smith, M. S., and Spassova, I. Wed . "Direct neutron capture cross section on Ge80 and probing shape coexistence in neutron-rich nuclei". United States. https://doi.org/10.1103/PhysRevC.100.044613. https://www.osti.gov/servlets/purl/1623265.
@article{osti_1623265,
title = {Direct neutron capture cross section on Ge80 and probing shape coexistence in neutron-rich nuclei},
author = {Ahn, S. and Bardayan, D. W. and Jones, K. L. and Adekola, A. S. and Arbanas, G. and Blackmon, J. C. and Chae, K. Y. and Chipps, K. A. and Cizewski, J. A. and Hardy, S. and Howard, M. E. and Kozub, R. L. and Manning, B. and Matoš, M. and Nesaraja, C. D. and O'Malley, P. D. and Pain, S. D. and Peters, W. A. and Pittman, S. T. and Rasco, B. C. and Smith, M. S. and Spassova, I.},
abstractNote = {Results are presented from the first neutron-transfer measurement on 80Ge using an exotic beam from the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. Newly measured spins and spectroscopic factors of low-lying states of 81Ge are determined, and the neutron capture cross section on 80Ge was calculated in a direct-semidirect model to provide a more realistic (n,γ) reaction rate for r-process simulations. Furthermore, a region of shape coexistence around N ≈ 50 is confirmed and implications for the magic nature of 78Ni are discussed.},
doi = {10.1103/PhysRevC.100.044613},
journal = {Physical Review C},
number = 4,
volume = 100,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: A spectrum of detected particle energy vs. laboratory angle gated on a time coincidence with a forward going recoil detected in the IC. Detected protons, deuterons, and carbon ions (surrounded by the red solid line) are from elastic scattering. Protons from the ($d$,$p$) reaction are in the regionmore » marked by the black line. The horizontal band at 5.8 MeV (in the dashed red rectangle) arises from a 244Cm calibration source.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.