skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Detailed study of the decay Cl 31 ( β γ ) S 31

Abstract

Background: 31Cl is a neutron-deficient isotope with a half-life of T1/2 = 190 (1) ms. The nuclear structure of its daughter, 31S, is important for the determination of the thermonuclear 30P(p,γ)31S reaction rate, which affects the final isotopic abundances of the ejecta from classical oxygen-neon novae. Purpose: Here, we aim to determine the β feedings, γ-decay branchings, and excitation energies of states populated in 31S and create a comprehensive decay scheme for comparison with predictions based on the shell model. Methods: Using a 31Cl rare istope beam implanted into a plastic scintillator and an array of high-purity Ge detectors, γ rays from the 31Cl(βγ)31S decay sequence were measured. Shell-model calculations using the USDB and the recently-developed USDE interactions were performed for comparison. Results: A 31Cl β-decay scheme was constructed from the experimental data and compared to the USDB and USDE shell-model calculations based on the β feeding and γ-decay branches of each observed state. 33 new γ-ray transitions and ten new β decay branches were observed. The β feeding and γ-decay branches of each observed state were compared to those from the USDB and USDE shell-model calculations. For every allowed transition predicted by the USD calculations up to an excitationmore » energy of 6.4 MeV in 31S, an analogous transition was found in the experimental data, enabling a one-to-one comparison with the shell model. Using these identifications, spin and parity arguments were made for observed states. Conclusions: The new 31Cl γ-decay scheme presented in this work is the most complete and precise one for this nucleus constructed to date, incorporating statistics over an order of magnitude higher than previous work on 31Cl β-delayed γ decay. Of particular interest is the discovery of a 6390-keV state that mixes with the isobaric analog state and affects the 30P(p,γ)31S reaction rate. Other states observed in the decay are not expected to strongly affect the 30P(p,γ)31S reaction rate, but the comprehensive comparison to the shell model helps to clarify spin and parity assignments of resonances that might affect the rate.« less

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [5];  [6];  [1];  [2];  [7];  [3];  [5];  [1];  [1];  [4];  [8];  [3];  [1];  [9] more »;  [3];  [6];  [5];  [2] « less
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy. National Superconducting Cyclotron Lab. Joint Inst. for Nuclear Astrophysics
  2. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy. National Superconducting Cyclotron Lab.
  3. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab. Dept. of Chemistry
  4. Univ. of Notre Dame, IN (United States). Dept. of Physics
  5. McMaster Univ., Hamilton, ON (Canada). Dept. of Physics and Astronomy
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  7. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab. Joint Inst. for Nuclear Astrophysics
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  9. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy. National Superconducting Cyclotron Lab.; Univ. of Southern Indiana, Evansville, IN (United States). Dept. of Geology and Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Michigan State Univ., East Lansing, MI (United States); McMaster Univ., Hamilton, ON (Canada)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1479729
Alternate Identifier(s):
OSTI ID: 1454316
Grant/Contract Number:  
AC05-00OR22725; NA0000979; SC0016052; PHY-1102511; PHY-1404442; PHY-1419765; PHY-1430152
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; beta decay; nuclear astrophysics; resonance reactions

Citation Formats

Bennett, M. B., Wrede, C., Liddick, S. N., Pérez-Loureiro, D., Bardayan, D. W., Brown, B. A., Chen, A. A., Chipps, K. A., Fry, C., Glassman, B. E., Langer, C., Larson, N. R., McNeice, E. I., Meisel, Z., Ong, W., O'Malley, P. D., Pain, S. D., Prokop, C. J., Schatz, H., Schwartz, S. B., Suchyta, S., Thompson, P., Walters, M., and Xu, X. Detailed study of the decay Cl31(βγ)S31. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.065803.
Bennett, M. B., Wrede, C., Liddick, S. N., Pérez-Loureiro, D., Bardayan, D. W., Brown, B. A., Chen, A. A., Chipps, K. A., Fry, C., Glassman, B. E., Langer, C., Larson, N. R., McNeice, E. I., Meisel, Z., Ong, W., O'Malley, P. D., Pain, S. D., Prokop, C. J., Schatz, H., Schwartz, S. B., Suchyta, S., Thompson, P., Walters, M., & Xu, X. Detailed study of the decay Cl31(βγ)S31. United States. https://doi.org/10.1103/PhysRevC.97.065803
Bennett, M. B., Wrede, C., Liddick, S. N., Pérez-Loureiro, D., Bardayan, D. W., Brown, B. A., Chen, A. A., Chipps, K. A., Fry, C., Glassman, B. E., Langer, C., Larson, N. R., McNeice, E. I., Meisel, Z., Ong, W., O'Malley, P. D., Pain, S. D., Prokop, C. J., Schatz, H., Schwartz, S. B., Suchyta, S., Thompson, P., Walters, M., and Xu, X. 2018. "Detailed study of the decay Cl31(βγ)S31". United States. https://doi.org/10.1103/PhysRevC.97.065803. https://www.osti.gov/servlets/purl/1479729.
@article{osti_1479729,
title = {Detailed study of the decay Cl31(βγ)S31},
author = {Bennett, M. B. and Wrede, C. and Liddick, S. N. and Pérez-Loureiro, D. and Bardayan, D. W. and Brown, B. A. and Chen, A. A. and Chipps, K. A. and Fry, C. and Glassman, B. E. and Langer, C. and Larson, N. R. and McNeice, E. I. and Meisel, Z. and Ong, W. and O'Malley, P. D. and Pain, S. D. and Prokop, C. J. and Schatz, H. and Schwartz, S. B. and Suchyta, S. and Thompson, P. and Walters, M. and Xu, X.},
abstractNote = {Background: 31Cl is a neutron-deficient isotope with a half-life of T1/2 = 190 (1) ms. The nuclear structure of its daughter, 31S, is important for the determination of the thermonuclear 30P(p,γ)31S reaction rate, which affects the final isotopic abundances of the ejecta from classical oxygen-neon novae. Purpose: Here, we aim to determine the β feedings, γ-decay branchings, and excitation energies of states populated in 31S and create a comprehensive decay scheme for comparison with predictions based on the shell model. Methods: Using a 31Cl rare istope beam implanted into a plastic scintillator and an array of high-purity Ge detectors, γ rays from the 31Cl(βγ)31S decay sequence were measured. Shell-model calculations using the USDB and the recently-developed USDE interactions were performed for comparison. Results: A 31Cl β-decay scheme was constructed from the experimental data and compared to the USDB and USDE shell-model calculations based on the β feeding and γ-decay branches of each observed state. 33 new γ-ray transitions and ten new β decay branches were observed. The β feeding and γ-decay branches of each observed state were compared to those from the USDB and USDE shell-model calculations. For every allowed transition predicted by the USD calculations up to an excitation energy of 6.4 MeV in 31S, an analogous transition was found in the experimental data, enabling a one-to-one comparison with the shell model. Using these identifications, spin and parity arguments were made for observed states. Conclusions: The new 31Cl γ-decay scheme presented in this work is the most complete and precise one for this nucleus constructed to date, incorporating statistics over an order of magnitude higher than previous work on 31Cl β-delayed γ decay. Of particular interest is the discovery of a 6390-keV state that mixes with the isobaric analog state and affects the 30P(p,γ)31S reaction rate. Other states observed in the decay are not expected to strongly affect the 30P(p,γ)31S reaction rate, but the comprehensive comparison to the shell model helps to clarify spin and parity assignments of resonances that might affect the rate.},
doi = {10.1103/PhysRevC.97.065803},
url = {https://www.osti.gov/biblio/1479729}, journal = {Physical Review C},
issn = {2469-9985},
number = 6,
volume = 97,
place = {United States},
year = {Thu Jun 14 00:00:00 EDT 2018},
month = {Thu Jun 14 00:00:00 EDT 2018}
}

Journal Article:

Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Particle identification plot showing 31Cl and strongest contaminants. Time of flight between the A1900 focal plane and the Si PIN detector is plotted on the horizontal axis while energy loss in the PIN detector is plotted on the vertical axis. The color scale denotes number of ions, withmore » higher number of ions higher on the scale.« less

Save / Share:

Works referenced in this record:

Revalidation of the isobaric multiplet mass equation for the A = 20 quintet
journal, October 2015


Isobaric multiplet mass equation in the A = 31 , T = 3 / 2 quartets
journal, June 2016


Toward concordance of $E_{x}$ and $J^{\pi}$ values for proton unbound 31S states
journal, September 2016


Isospin Mixing Reveals P 30 ( p , γ ) S 31 Resonance Influencing Nova Nucleosynthesis
journal, March 2016


New portal to the O 15 ( α , γ ) Ne 19 resonance triggering CNO-cycle breakout
journal, September 2017


Nuclear energy levels of 31S and 33C1
journal, April 1970


Shell-model study of 31S at excitations relevant to the thermonuclear 30P(p, $\gamma$ )31S reaction rate
journal, July 2016


New P 30 ( p , γ ) S 31 resonances and oxygen-neon nova nucleosynthesis
journal, November 2007


A peak-fitting and calibration program for Ge(Li) detectors
journal, December 1969


Astrophysically important S 31 states studied with the S 32 ( p , d ) S 31 reaction
journal, July 2007


Evidence for the existence of the astrophysically important 6.40-MeV state of 31 S
journal, November 2013


A parametrization of the phase space factor for allowed β-decay
journal, October 1974


Nuclear Data Sheets for
journal, February 2013


The Imprint of Nova Nucleosynthesis in Presolar Grains
journal, September 2004


Commissioning the A1900 projectile fragment separator
journal, May 2003


Isospin symmetry breaking at high spin in the mirror nuclei Ar 35 and Cl 35
journal, March 2007


The essential decay of pandemonium: A demonstration of errors in complex beta-decay schemes
journal, November 1977


Supplement to energy levels of A = 21–44 nuclei (VII)
journal, April 1998


The AME2016 atomic mass evaluation (II). Tables, graphs and references
journal, March 2017


New “USD” Hamiltonians for the sd shell
journal, September 2006


Structure of P 29 and S 31 studied in the ( He 3 , n ) reaction
journal, September 1982


One-nucleon pickup reactions on 32S: Experimental results and shell-model calculations
journal, August 1999


Excited states in 31S studied via beta decay of 31Cl
journal, January 2006


Classical-Nova Contribution to the Milky Way’s Al 26 Abundance: Exit Channel of the Key Al 25 ( p , γ ) Si 26 Resonance
journal, December 2013


β decay of 32 Cl: Precision γ -ray spectroscopy and a measurement of isospin-symmetry breaking
journal, February 2012


Energy Levels of S 31
journal, March 1966


β -delayed γ decay of P 26 : Possible evidence of a proton halo
journal, June 2016


Digital data acquisition system implementation at the National Superconducting Cyclotron Laboratory
journal, March 2014

  • Prokop, C. J.; Liddick, S. N.; Abromeit, B. L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 741
  • https://doi.org/10.1016/j.nima.2013.12.044

sd -shell observables for the USDA and USDB Hamiltonians
journal, December 2008


Energy levels of 31S
journal, March 1975


Nuclear Thermometers for Classical Novae
journal, December 2012


Beta-decay of 31Cl: an indirect probe of the 30P(p, $\gamma$ )31S reaction. Present status and future perspectives
journal, August 2016


Search for 1 p Neutron Strength in S 31 by the Reaction S 32 ( He 3 , α ) S 31
journal, January 1972


Key Resonances in the P 30 ( p , γ ) S 31 Gateway Reaction for the Production of Heavy Elements in ONe Novae
journal, June 2012


Stardust in meteorites
journal, November 2011


Observation of Doppler broadening in β -delayed proton- γ decay
journal, September 2015


β -delayed γ decay of 20 Mg and the Ne 19 ( p , γ ) 20 Na breakout reaction in Type I X-ray bursts
journal, March 2018


Radio Frequency Fragment Separator at NSCL
journal, July 2009

  • Bazin, D.; Andreev, V.; Becerril, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 606, Issue 3
  • https://doi.org/10.1016/j.nima.2009.05.100

Stellar Nucleosynthesis and the Isotopic Composition of Presolar Grains from Primitive Meteorites
journal, May 1998


Nuclear Data Sheets for A = 32
journal, September 2011


Shell-model studies of the astrophysical rapid-proton-capture reaction P 30 ( p , γ ) S 31
journal, June 2014