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Title: New measurement of the E α lab = 0.83 MeV resonance in Ne 22 ( α , γ ) Mg 26

Abstract

The $$E ^{lab}_{a}$$ = 0.83 MeV resonance in the 22Ne($α,γ$ ) 26Mg reaction strongly impacts the reaction rates in the stellar temperature region crucial for the astrophysical s process. Herein, we report on a new measurement of the energy and strength of this resonance using techniques different from previous investigations. We use a blister-resistant 22Ne-implanted target and employ $γγ-$coincidence detection techniques. We find values for the resonance energy and strength of $$E ^{lab}_{a}$$ = 835.2 ± 3.0 keV and $ωγ$ = (4.6 ± 1.2) × 10 -5 eV, respectively. Our mean values are higher compared to previous values, although the results overlap within uncertainties. The uncertainty in the resonance energy has been significantly reduced. The spin-parity assignment, based on the present and previous work, is $J$ $π$ = (0 +, 1 -, 2 +, 3 -).

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Univ. Nuclear Lab.
Publication Date:
Research Org.:
Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1600494
Alternate Identifier(s):
OSTI ID: 1508675; OSTI ID: 1659269
Grant/Contract Number:  
FG02-97ER41041; FG02-97ER41033
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; 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; experimental nuclear astrophysics

Citation Formats

Hunt, Sean, Iliadis, Christian, Champagne, Art, Downen, Lori, and Cooper, Andrew. New measurement of the Eαlab=0.83 MeV resonance in Ne22(α,γ)Mg26. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.045804.
Hunt, Sean, Iliadis, Christian, Champagne, Art, Downen, Lori, & Cooper, Andrew. New measurement of the Eαlab=0.83 MeV resonance in Ne22(α,γ)Mg26. United States. doi:10.1103/PhysRevC.99.045804.
Hunt, Sean, Iliadis, Christian, Champagne, Art, Downen, Lori, and Cooper, Andrew. Wed . "New measurement of the Eαlab=0.83 MeV resonance in Ne22(α,γ)Mg26". United States. doi:10.1103/PhysRevC.99.045804. https://www.osti.gov/servlets/purl/1600494.
@article{osti_1600494,
title = {New measurement of the Eαlab=0.83 MeV resonance in Ne22(α,γ)Mg26},
author = {Hunt, Sean and Iliadis, Christian and Champagne, Art and Downen, Lori and Cooper, Andrew},
abstractNote = {The $E ^{lab}_{a}$ = 0.83 MeV resonance in the 22Ne($α,γ$ )26Mg reaction strongly impacts the reaction rates in the stellar temperature region crucial for the astrophysical s process. Herein, we report on a new measurement of the energy and strength of this resonance using techniques different from previous investigations. We use a blister-resistant 22Ne-implanted target and employ $γγ-$coincidence detection techniques. We find values for the resonance energy and strength of $E ^{lab}_{a}$ = 835.2 ± 3.0 keV and $ωγ$ = (4.6 ± 1.2) × 10-5 eV, respectively. Our mean values are higher compared to previous values, although the results overlap within uncertainties. The uncertainty in the resonance energy has been significantly reduced. The spin-parity assignment, based on the present and previous work, is $J$$π$ = (0+, 1-, 2+, 3-).},
doi = {10.1103/PhysRevC.99.045804},
journal = {Physical Review C},
issn = {2469-9985},
number = 4,
volume = 99,
place = {United States},
year = {2019},
month = {4}
}

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