skip to main content

DOE PAGESDOE PAGES

Title: Observation of Doppler broadening in β -delayed proton- γ decay

Background: The Doppler broadening of gamma-ray peaks is due to nuclear recoil from beta-delayed nucleon emission can be used to measure the energies of the nucleons. This method has never been tested using beta-delayed proton emission or applied to a recoil heavier than A = 10. Purpose: To test and apply this Doppler broadening method using gamma-ray peaks from the P-26(beta p gamma)Al-25 decay sequence. Methods: A fast beam of P-26 was implanted into a planar Ge detector, which was used as a P-26 beta-decay trigger. The SeGA array of high-purity Ge detectors was used to detect gamma rays from the P-26(beta p gamma)Al-25 decay sequence. Results: Radiative Doppler broadening in beta-delayed proton-gamma decay was observed for the first time. Moreover, the Doppler broadening analysis method was verified using the 1613-keV gamma-ray line for which the proton energies were previously known. The 1776-keV gamma ray de-exciting the 2720 keV Al-25 level was observed in P-26(beta p gamma)Al-25 decay for the first time and used to determine that the center-of-mass energy of the proton emission feeding the 2720-keV level is 5.1 +/- 1.0 (stat.) +/- 0.6 (syst.) MeV, corresponding to a Si-26 excitation energy of 13.3 +/- 1.0 (stat.) +/- 0.6more » (syst.) MeV for the proton-emitting level. Conclusions: Finally, the Doppler broadening method has been demonstrated to provide practical measurements of the energies for beta-delayed nucleon emissions populating excited states of nuclear recoils at least as heavy as A = 25.« less
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [4] ;  [4] ;  [2] ;  [6] ;  [7] ;  [8] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] more »;  [2] ;  [2] ;  [9] ;  [2] ;  [4] « less
  1. Michigan State Univ., East Lansing, MI (United States); Univ. of Southern Indiana, Evansville, IN (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Michigan State Univ., East Lansing, MI (United States); Kalamazoo College, MI (United States)
  4. McMaster Univ., Hamilton, ON (Canada)
  5. Colorado School of Mines, Golden, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  6. Yale Univ., New Haven, CT (United States)
  7. Michigan State Univ., East Lansing, MI (United States); Univ. of Washington, Seattle, WA (United States)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  9. Michigan State Univ., East Lansing, MI (United States); Univ. of Notre Dame, IN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; PHY-1102511; PHY 0822648; NA0000979
Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OSTI Identifier:
1261466

Schwartz, S. B., Wrede, C., Bennett, M. B., Liddick, S. N., Pérez-Loureiro, D., Bowe, A., Chen, A. A., Chipps, K. A., Cooper, N., Irvine, D., McNeice, E., Montes, F., Naqvi, F., Ortez, R., Pain, S. D., Pereira, J., Prokop, C., Quaglia, J., Quinn, S. J., Sakstrup, J., Santia, M., Shanab, S., Simon, A., Spyrou, A., and Thiagalingam, E.. Observation of Doppler broadening in β -delayed proton- γ decay. United States: N. p., Web. doi:10.1103/PhysRevC.92.031302.
Schwartz, S. B., Wrede, C., Bennett, M. B., Liddick, S. N., Pérez-Loureiro, D., Bowe, A., Chen, A. A., Chipps, K. A., Cooper, N., Irvine, D., McNeice, E., Montes, F., Naqvi, F., Ortez, R., Pain, S. D., Pereira, J., Prokop, C., Quaglia, J., Quinn, S. J., Sakstrup, J., Santia, M., Shanab, S., Simon, A., Spyrou, A., & Thiagalingam, E.. Observation of Doppler broadening in β -delayed proton- γ decay. United States. doi:10.1103/PhysRevC.92.031302.
Schwartz, S. B., Wrede, C., Bennett, M. B., Liddick, S. N., Pérez-Loureiro, D., Bowe, A., Chen, A. A., Chipps, K. A., Cooper, N., Irvine, D., McNeice, E., Montes, F., Naqvi, F., Ortez, R., Pain, S. D., Pereira, J., Prokop, C., Quaglia, J., Quinn, S. J., Sakstrup, J., Santia, M., Shanab, S., Simon, A., Spyrou, A., and Thiagalingam, E.. 2015. "Observation of Doppler broadening in β -delayed proton- γ decay". United States. doi:10.1103/PhysRevC.92.031302. https://www.osti.gov/servlets/purl/1261466.
@article{osti_1261466,
title = {Observation of Doppler broadening in β -delayed proton- γ decay},
author = {Schwartz, S. B. and Wrede, C. and Bennett, M. B. and Liddick, S. N. and Pérez-Loureiro, D. and Bowe, A. and Chen, A. A. and Chipps, K. A. and Cooper, N. and Irvine, D. and McNeice, E. and Montes, F. and Naqvi, F. and Ortez, R. and Pain, S. D. and Pereira, J. and Prokop, C. and Quaglia, J. and Quinn, S. J. and Sakstrup, J. and Santia, M. and Shanab, S. and Simon, A. and Spyrou, A. and Thiagalingam, E.},
abstractNote = {Background: The Doppler broadening of gamma-ray peaks is due to nuclear recoil from beta-delayed nucleon emission can be used to measure the energies of the nucleons. This method has never been tested using beta-delayed proton emission or applied to a recoil heavier than A = 10. Purpose: To test and apply this Doppler broadening method using gamma-ray peaks from the P-26(beta p gamma)Al-25 decay sequence. Methods: A fast beam of P-26 was implanted into a planar Ge detector, which was used as a P-26 beta-decay trigger. The SeGA array of high-purity Ge detectors was used to detect gamma rays from the P-26(beta p gamma)Al-25 decay sequence. Results: Radiative Doppler broadening in beta-delayed proton-gamma decay was observed for the first time. Moreover, the Doppler broadening analysis method was verified using the 1613-keV gamma-ray line for which the proton energies were previously known. The 1776-keV gamma ray de-exciting the 2720 keV Al-25 level was observed in P-26(beta p gamma)Al-25 decay for the first time and used to determine that the center-of-mass energy of the proton emission feeding the 2720-keV level is 5.1 +/- 1.0 (stat.) +/- 0.6 (syst.) MeV, corresponding to a Si-26 excitation energy of 13.3 +/- 1.0 (stat.) +/- 0.6 (syst.) MeV for the proton-emitting level. Conclusions: Finally, the Doppler broadening method has been demonstrated to provide practical measurements of the energies for beta-delayed nucleon emissions populating excited states of nuclear recoils at least as heavy as A = 25.},
doi = {10.1103/PhysRevC.92.031302},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 92,
place = {United States},
year = {2015},
month = {9}
}