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

Title: New measurements of low-energy resonances in the Ne 22 ( p , γ ) Na 23 reaction

Abstract

The Ne 22 ( p , γ ) Na 23 reaction is one of the most uncertain reactions in the NeNa cycle and plays a crucial role in the creation of Na 23 , the only stable Na isotope. Uncertainties in the low-energy rates of this and other reactions in the NeNa cycle lead to ambiguities in the nucleosynthesis predicted from models of thermally pulsing asymptotic giant branch (AGB) stars. This in turn complicates the interpretation of anomalous Na-O trends in globular cluster evolutionary scenarios. Prior studies of the Ne 22 ( p , γ ) Na 23 , Ne 22 ( He 3 , d ) Na 23 , and C 12 ( C 12 , p ) Na 23 reactions disagree on the strengths, spins, and parities of low-energy resonances in Na 23 and the direct-capture Ne 22 ( p , γ ) Na 23 reaction rate contains large uncertainties as well. Here, we present new measurements of resonances at E r c.m. = 417 , 178, and 151 keV and of the direct-capture process in the Ne 22 ( p , γ ) Na 23 reaction. The resulting total Ne 22 ( p , γ ) Na 23 rate is approximately a factor of 20 higher than the rate listed in a recent compilation at temperatures relevant to hot-bottom burning in AGB stars. Although our rate is close to that derived from a recent Ne 22 ( p , γ ) Na 23 measurement by Cavanna et al. in 2015, we find that this large rate increase results in only a modest 18% increase in the Na 23 abundance predicted from a 5 M thermally pulsing AGB star model from Ventura and D'Antona (2005). The estimated astrophysical impact of this rate increase is in marked contrast to the factor of ~ 3 increase in Na 23 abundance predicted by Cavanna et al. and is attributed to the interplay between the Na 23 ( p , α ) Ne 20 and Ne 20 ( p , γ ) Na 21 reactions, both of which remain fairly uncertain at the relevant temperature range.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Duke Univ., Durham, NC (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Duke Univ., Durham, NC (United States)
Publication Date:
Research Org.:
Univ. of North Carolina, Chapel Hill, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1600490
Alternate Identifier(s):
OSTI ID: 1341296
Grant/Contract Number:  
FG02-97ER41041
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 96 KNOWLEDGE MANAGEMENT AND PRESERVATION; experimental nuclear astrophysics

Citation Formats

Kelly, K. J., Champagne, A. E., Downen, L. N., Dermigny, J. R., Hunt, S., Iliadis, C., and Cooper, A. L. New measurements of low-energy resonances in the Ne22(p,γ)Na23 reaction. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.95.015806.
Kelly, K. J., Champagne, A. E., Downen, L. N., Dermigny, J. R., Hunt, S., Iliadis, C., & Cooper, A. L. New measurements of low-energy resonances in the Ne22(p,γ)Na23 reaction. United States. doi:10.1103/PhysRevC.95.015806.
Kelly, K. J., Champagne, A. E., Downen, L. N., Dermigny, J. R., Hunt, S., Iliadis, C., and Cooper, A. L. Thu . "New measurements of low-energy resonances in the Ne22(p,γ)Na23 reaction". United States. doi:10.1103/PhysRevC.95.015806. https://www.osti.gov/servlets/purl/1600490.
@article{osti_1600490,
title = {New measurements of low-energy resonances in the Ne22(p,γ)Na23 reaction},
author = {Kelly, K. J. and Champagne, A. E. and Downen, L. N. and Dermigny, J. R. and Hunt, S. and Iliadis, C. and Cooper, A. L.},
abstractNote = {The Ne22(p,γ)Na23 reaction is one of the most uncertain reactions in the NeNa cycle and plays a crucial role in the creation of Na23, the only stable Na isotope. Uncertainties in the low-energy rates of this and other reactions in the NeNa cycle lead to ambiguities in the nucleosynthesis predicted from models of thermally pulsing asymptotic giant branch (AGB) stars. This in turn complicates the interpretation of anomalous Na-O trends in globular cluster evolutionary scenarios. Prior studies of the Ne22(p,γ)Na23, Ne22(He3,d)Na23, and C12(C12,p)Na23 reactions disagree on the strengths, spins, and parities of low-energy resonances in Na23 and the direct-capture Ne22(p,γ)Na23 reaction rate contains large uncertainties as well. Here, we present new measurements of resonances at Erc.m.=417, 178, and 151 keV and of the direct-capture process in the Ne22(p,γ)Na23 reaction. The resulting total Ne22(p,γ)Na23 rate is approximately a factor of 20 higher than the rate listed in a recent compilation at temperatures relevant to hot-bottom burning in AGB stars. Although our rate is close to that derived from a recent Ne22(p,γ)Na23 measurement by Cavanna et al. in 2015, we find that this large rate increase results in only a modest 18% increase in the Na23 abundance predicted from a 5 M⊙ thermally pulsing AGB star model from Ventura and D'Antona (2005). The estimated astrophysical impact of this rate increase is in marked contrast to the factor of ~3 increase in Na23 abundance predicted by Cavanna et al. and is attributed to the interplay between the Na23(p,α)Ne20 and Ne20(p,γ)Na21 reactions, both of which remain fairly uncertain at the relevant temperature range.},
doi = {10.1103/PhysRevC.95.015806},
journal = {Physical Review C},
issn = {2469-9985},
number = 1,
volume = 95,
place = {United States},
year = {2017},
month = {1}
}

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

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Abundance Variations within Globular Clusters
journal, September 2004


A Triple Main Sequence in the Globular Cluster NGC 2808
journal, April 2007

  • Piotto, G.; Bedin, L. R.; Anderson, J.
  • The Astrophysical Journal, Vol. 661, Issue 1
  • DOI: 10.1086/518503

On the self-enrichment scenario of galactic globular clusters: constraints on the IMF
journal, October 2006


Origin of multiple stellar populations in globular clusters and their helium enrichment
journal, November 2008


Light nuclei in galactic globular clusters: constraints on the self-enrichment scenario from nucleosynthesis
journal, May 2007


Correlated cyanogen and sodium anomalies in the globular clusters 47 TUC and NGC 6752
journal, April 1981

  • Cottrell, P. L.; Da Costa, G. S.
  • The Astrophysical Journal, Vol. 245
  • DOI: 10.1086/183527

Comments on the origin of the carbon and nitrogen variations within NGC 6752 and 47 Tucanae
journal, March 1982

  • Smith, G. H.; Norris, J.
  • The Astrophysical Journal, Vol. 254
  • DOI: 10.1086/159770

Predictions for Self-Pollution in Globular Cluster Stars
journal, March 2001

  • Ventura, Paolo; D’Antona, Francesca; Mazzitelli, Italo
  • The Astrophysical Journal, Vol. 550, Issue 1
  • DOI: 10.1086/319496

Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
journal, January 2007


Massive binaries as the source of abundance anomalies in globular clusters
journal, October 2009


A model for globular cluster extreme anomalies
journal, August 2007


Full computation of massive AGB evolution: I. The large impact of convection on nucleosynthesis
journal, February 2005


Measurement of the E r c.m. = 138 keV resonance in the 23 Na( p , γ ) 24 Mg reaction and the abundance of sodium in AGB stars
journal, December 2013


Investigation of the 22Ne(p,γ)23Na reaction via (3He,d) spectroscopy
journal, December 2001


Energy levels of A = 21–44 nuclei (VII)
journal, December 1990


Charged-particle thermonuclear reaction rates: II. Tables and graphs of reaction rates and probability density functions
journal, October 2010


Nuclear Data Sheets for A = 23
journal, January 2007


A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance
journal, November 2014


Three New Low-Energy Resonances in the Ne 22 ( p , γ ) Na 23 Reaction
journal, December 2015


Fitting using finite Monte Carlo samples
journal, October 1993


ROOT — An object oriented data analysis framework
journal, April 1997

  • Brun, Rene; Rademakers, Fons
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 389, Issue 1-2
  • DOI: 10.1016/S0168-9002(97)00048-X

γ-Ray spectroscopy using a binned likelihood approach
journal, September 2016

  • Dermigny, J. R.; Iliadis, C.; Buckner, M. Q.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 830
  • DOI: 10.1016/j.nima.2016.06.017

New recommended ω γ for the E r c . m . = 458 keV resonance in Ne 22 ( p , γ ) Na 23
journal, September 2015


Strengths of the resonances at 436, 479, 639, 661, and 1279 keV in the Ne 22 ( p , γ ) Na 23 reaction
journal, October 2015


High-intensity-beam study of O 17 ( p , γ ) F 18 and thermonuclear reaction rates for O 17 + p
journal, January 2015


Nuclear astrophysics studies at LENA: The accelerators
journal, November 2010

  • Cesaratto, J. M.; Champagne, A. E.; Clegg, T. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 623, Issue 3
  • DOI: 10.1016/j.nima.2010.08.104

Thermonuclear reaction rate of 18 O( p , γ ) 19 F
journal, December 2012


Monte Carlo simulation of the LENA detector system
journal, November 2013

  • Howard, C.; Iliadis, C.; Champagne, A. E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 729
  • DOI: 10.1016/j.nima.2013.07.032

A Java-based data acquisition system for nuclear physics
journal, May 2001

  • Swartz, Kenneth B.; Visser, Dale W.; Baris, John M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 463, Issue 1-2
  • DOI: 10.1016/S0168-9002(01)00316-3

Ratio of germanium detector peak efficiencies at photon energies of 4.4 and 11.7MeV: Experiment versus simulation
journal, June 2010

  • Carson, Spencer; Iliadis, Christian; Cesaratto, John
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 618, Issue 1-3
  • DOI: 10.1016/j.nima.2010.02.128

Nuclear astrophysics studies at the LENA facility: The -ray detection system
journal, October 2006

  • Longland, R.; Iliadis, C.; Champagne, A. E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 566, Issue 2
  • DOI: 10.1016/j.nima.2006.07.006

The kinetics of formation and structure of anodic oxide films on tantalum
journal, May 1953


Srim-2003
journal, June 2004

  • Ziegler, James F.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 219-220
  • DOI: 10.1016/j.nimb.2004.01.208

Resonance strength in Ne 22 ( p , γ ) Na 23 from depth profiling in aluminum
journal, May 2010


Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Theory of Angular Correlation of Nuclear Radiations
journal, July 1953


Minuit - a system for function minimization and analysis of the parameter errors and correlations
journal, December 1975


The energy levels of 23Na
journal, April 1973


Resonance strengths, branching ratios and mean lifetimes of nuclear energy levels in23Na
journal, April 1971

  • du Toit, Z. B.; de Kock, P. R.; Mouton, W. L.
  • Zeitschrift für Physik A Hadrons and nuclei, Vol. 246, Issue 2
  • DOI: 10.1007/BF01394730

Absolute resonance strengths in the Ne 2 0 , 2 1 , 2 2 ( p ,   γ ) Na 2 1 , 2 2 , 2 3 and Ne 21 ( p ,   p 1 γ ) Ne 21 reactions
journal, February 1977


Proton-induced direct capture on 21Ne and 22Ne
journal, October 1983


Hydrogen burning of 20Ne and 22Ne in stars
journal, April 1975


Fluctuations of Nuclear Cross Sections in the "Continuum" Region
journal, November 1960


Direct measurement of low-energy Ne 22 ( p , γ ) Na 23 resonances
journal, November 2016


Nuclear Structure of Na 23 : The Ne 22 ( He 3 , d ) Reaction
journal, December 1971


The 22Ne(d, n) 23Na reaction
journal, March 1973


Starlib: a Next-Generation Reaction-Rate Library for Nuclear Astrophysics
journal, July 2013

  • Sallaska, A. L.; Iliadis, C.; Champange, A. E.
  • The Astrophysical Journal Supplement Series, Vol. 207, Issue 1
  • DOI: 10.1088/0067-0049/207/1/18

Nuclear Mixing Meters for Classical Novae
journal, October 2013


Statistical methods for thermonuclear reaction rates and nucleosynthesis simulations
journal, February 2015

  • Iliadis, Christian; Longland, Richard; Coc, Alain
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 42, Issue 3
  • DOI: 10.1088/0954-3899/42/3/034007

Charged-particle thermonuclear reaction rates: I. Monte Carlo method and statistical distributions
journal, October 2010


Recommendations for Monte Carlo nucleosynthesis sampling
journal, November 2012