New portal to the O15(α,γ)Ne19 resonance triggering CNO-cycle breakout

Wrede, C.; Glassman, B. E.; Pérez-Loureiro, D.; Allen, J. M.; Bardayan, D. W.; Bennett, M. B.; Brown, B. A.; Chipps, Kelly A.; Febbraro, Michael T.; Fry, C.; Hall, M. R.; Hall, O.; Liddick, S. N.; O'Malley, P.; Ong, W. -J.; Pain, Steven D.; Schwartz, S. B.; Shidling, P.; Sims, H.; Thompson, Paul James; Zhang, H.

doi:10.1103/PhysRevC.96.032801

Title: New portal to the ${}^{15}O (α, γ) {}^{19}{Ne}$ resonance triggering CNO-cycle breakout

Abstract

The ¹⁵O(α,γ)¹⁹Ne reaction is expected to trigger the initial path for breakout from the CNO hydrogen-burning cycles to the rapid proton capture (rp) process in type I x-ray bursts on accreting neutron stars. The thermonuclear reaction rate has a major impact on models of type I x-ray burst observables and it depends on the small α-particle branching ratio, Γ_α/Γ, of the 4.03 MeV state in ¹⁹Ne. Attempts to measure Γ_α/Γ by populating the 4.03 MeV state using nuclear reactions have only led to strong upper limits. In the present work, we report the first experimental evidence that the 4.03 MeV ¹⁹Ne state is populated in ²⁰Mg β-delayed proton emission. Furthermore this new channel has the potential to provide the necessary sensitivity to detect a finite value of Γ_α/Γ.

Authors:

Wrede, C. ^[1]; Glassman, B. E. ^[1]; Pérez-Loureiro, D. ^[1]; Allen, J. M. ^[2]; Bardayan, D. W. ^[2]; Bennett, M. B. ^[1]; Brown, B. A. ^[1];

^[3];

^[3]; Fry, C. ^[1]; Hall, M. R. ^[2]; Hall, O. ^[2]; Liddick, S. N. ^[1]; O'Malley, P. ^[2]; Ong, W. -J. ^[1];

^[4]; Schwartz, S. B. ^[1]; Shidling, P. ^[5]; Sims, H. ^[6]; Thompson, Paul James ^[3] more »

Michigan State Univ., East Lansing, MI (United States)
Univ. of Notre Dame, Notre Dame, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Texas A & M Univ., College Station, TX (United States)
Univ. of Surrey, Guildford (United Kingdom)

Publication Date:: 2017-09-29

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1513412

Alternate Identifier(s):: OSTI ID: 1395605

Grant/Contract Number:: AC05-00OR22725; SC0016052; NA0003221; NA0000979

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 96; Journal Issue: 3; 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

Citation Formats


                    Wrede, C., Glassman, B. E., Pérez-Loureiro, D., Allen, J. M., Bardayan, D. W., Bennett, M. B., Brown, B. A., Chipps, Kelly A., Febbraro, Michael T., Fry, C., Hall, M. R., Hall, O., Liddick, S. N., O'Malley, P., Ong, W. -J., Pain, Steven D., Schwartz, S. B., Shidling, P., Sims, H., Thompson, Paul James, and Zhang, H.. New portal to the O15(α,γ)Ne19 resonance triggering CNO-cycle breakout.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevC.96.032801.

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                    Wrede, C., Glassman, B. E., Pérez-Loureiro, D., Allen, J. M., Bardayan, D. W., Bennett, M. B., Brown, B. A., Chipps, Kelly A., Febbraro, Michael T., Fry, C., Hall, M. R., Hall, O., Liddick, S. N., O'Malley, P., Ong, W. -J., Pain, Steven D., Schwartz, S. B., Shidling, P., Sims, H., Thompson, Paul James, & Zhang, H.. New portal to the O15(α,γ)Ne19 resonance triggering CNO-cycle breakout.  United States.  https://doi.org/10.1103/PhysRevC.96.032801

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                    Wrede, C., Glassman, B. E., Pérez-Loureiro, D., Allen, J. M., Bardayan, D. W., Bennett, M. B., Brown, B. A., Chipps, Kelly A., Febbraro, Michael T., Fry, C., Hall, M. R., Hall, O., Liddick, S. N., O'Malley, P., Ong, W. -J., Pain, Steven D., Schwartz, S. B., Shidling, P., Sims, H., Thompson, Paul James, and Zhang, H.. Fri .  
"New portal to the O15(α,γ)Ne19 resonance triggering CNO-cycle breakout".  United States.  https://doi.org/10.1103/PhysRevC.96.032801.  https://www.osti.gov/servlets/purl/1513412.

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@article{osti_1513412,

  title        = {New portal to the O15(α,γ)Ne19 resonance triggering CNO-cycle breakout},

  author       = {Wrede, C. and Glassman, B. E. and Pérez-Loureiro, D. and Allen, J. M. and Bardayan, D. W. and Bennett, M. B. and Brown, B. A. and Chipps, Kelly A. and Febbraro, Michael T. and Fry, C. and Hall, M. R. and Hall, O. and Liddick, S. N. and O'Malley, P. and Ong, W. -J. and Pain, Steven D. and Schwartz, S. B. and Shidling, P. and Sims, H. and Thompson, Paul James and Zhang, H.},

  abstractNote = {The 15O(α,γ)19Ne reaction is expected to trigger the initial path for breakout from the CNO hydrogen-burning cycles to the rapid proton capture (rp) process in type I x-ray bursts on accreting neutron stars. The thermonuclear reaction rate has a major impact on models of type I x-ray burst observables and it depends on the small α-particle branching ratio, Γα/Γ, of the 4.03 MeV state in 19Ne. Attempts to measure Γα/Γ by populating the 4.03 MeV state using nuclear reactions have only led to strong upper limits. In the present work, we report the first experimental evidence that the 4.03 MeV 19Ne state is populated in 20Mg β-delayed proton emission. Furthermore this new channel has the potential to provide the necessary sensitivity to detect a finite value of Γα/Γ.},

  doi          = {10.1103/PhysRevC.96.032801},

  journal      = {Physical Review C},

  number       = 3,

  volume       = 96,

  place        = {United States},

  year         = {2017},

  month        = {9}

}

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https://doi.org/10.1103/PhysRevC.96.032801

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Cited by: 9 works

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Figures / Tables:

Figure 1: Simplified ²⁰Mg ($T$_1/2 = 91.4 ms, $Q$_EC = 10627 keV [3,17,18]) $β$ decay scheme focusing on the transitions relevant to the present work (blue online). Energies are shown in units of keV. The proton separation energy of ²⁰Na is 2190 keV and the $α$-particle separation energy of ¹⁹Nemore »

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Works referenced in this record:

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Works referencing / citing this record:

Nuclear physics of the outer layers of accreting neutron stars
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Meisel, Zach; Deibel, Alex; Keek, Laurens
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Title: New portal to the O 15 ( α , γ ) Ne 19 resonance triggering CNO-cycle breakout

Abstract

Citation Formats

Figures / Tables:

The 15 O(α,γ) 19 Ne Reaction Rate and the Stability of Thermonuclear Burning on Accreting Neutron Stars journal, August 2007

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

Break-out reactions from the CNO cycles journal, January 1999

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Resonant Rate for 15 O ( α , γ ) 19 Ne journal, May 1995

Nuclear Data Sheets for A = 208 journal, August 2007

Optimization of the National Superconducting Cyclotron Laboratory Digital Data Acquisition System for use with fast scintillator detectors journal, August 2015

Energy levels of light nuclei, A = 20 journal, June 1998

Energy levels of light nuclei A = 18–19 journal, December 1995

Commissioning the A1900 projectile fragment separator journal, May 2003

Dependence of X-Ray Burst Models on Nuclear Reaction Rates journal, October 2016

Thirty-two-fold segmented germanium detectors to identify γ-rays from intermediate-energy exotic beams journal, July 2001

Branching ratio Γ α / Γ γ of the 4.033 MeV 3 / 2 + state in 19 Ne journal, June 2003

Astrophysical rate of 15 O ( α , γ ) 19 Ne via the ( p , t ) reaction in inverse kinematics journal, June 2003

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

Nuclear Data Sheets for A=40 journal, June 2004

Doppler broadened γ-lines from exotic nuclei journal, July 2003

Beta-decay of 20Mg journal, February 1995

THE INFLUENCE OF UNCERTAINTIES IN THE 15 O(α, γ) 19 Ne REACTION RATE ON MODELS OF TYPE I X-RAY BURSTS journal, June 2011

The Importance of 15 O(α,γ) 19 Ne to X‐Ray Bursts and Superbursts journal, October 2006

Lifetime of 19 Ne * (4.03 MeV) journal, October 2006

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

Explosive hydrogen burning journal, January 1981

Lifetime of the astrophysically important 4.03-MeV state in Ne 19 journal, October 2005

Lifetimes of states in Ne 19 above the O 15 + α breakup threshold journal, March 2008

Toward precise Q EC values for the superallowed 0 + → 0 + β decays of T = 2 nuclides: The masses of Na 20 , Al 24 , P 28 , and Cl 32 journal, May 2010

The Ame2012 atomic mass evaluation journal, December 2012

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Title: New portal to the ${}^{15}O (α, γ) {}^{19}{Ne}$ resonance triggering CNO-cycle breakout

The ¹⁵ O(α,γ) ¹⁹ Ne Reaction Rate and the Stability of Thermonuclear Burning on Accreting Neutron Stars
journal, August 2007

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

Break-out reactions from the CNO cycles
journal, January 1999

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

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

Resonant Rate for $^{15} O (α, γ)^{19} Ne$
journal, May 1995

Nuclear Data Sheets for A = 208
journal, August 2007

Optimization of the National Superconducting Cyclotron Laboratory Digital Data Acquisition System for use with fast scintillator detectors
journal, August 2015

Energy levels of light nuclei, A = 20
journal, June 1998

Energy levels of light nuclei A = 18–19
journal, December 1995

Commissioning the A1900 projectile fragment separator
journal, May 2003

Dependence of X-Ray Burst Models on Nuclear Reaction Rates
journal, October 2016

Thirty-two-fold segmented germanium detectors to identify γ-rays from intermediate-energy exotic beams
journal, July 2001

Branching ratio $Γ_{α} / Γ_{γ}$ of the 4.033 MeV ${3 / 2}^{+}$ state in $^{19} Ne$
journal, June 2003

Astrophysical rate of $^{15} O (α, γ)^{19} Ne$ via the $(p, t)$ reaction in inverse kinematics
journal, June 2003

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

Nuclear Data Sheets for A=40
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journal, July 2003

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journal, February 1995

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The Importance of ¹⁵ O(α,γ) ¹⁹ Ne to X‐Ray Bursts and Superbursts
journal, October 2006

Lifetime of $^{19} {Ne}^{*}$ (4.03 MeV)
journal, October 2006

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journal, June 2016

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journal, January 1981

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journal, October 2005

Lifetimes of states in ${}^{19}{Ne}$ above the ${}^{15}O$ $+ α$ breakup threshold
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journal, December 2012

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journal, October 2016

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journal, September 2015

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