New measurement of the MeV resonance in
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:
-
- Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Univ. Nuclear Lab.
- Publication Date:
- Research Org.:
- University 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:
- 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. https://doi.org/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. https://doi.org/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},
number = 4,
volume = 99,
place = {United States},
year = {Wed Apr 24 00:00:00 EDT 2019},
month = {Wed Apr 24 00:00:00 EDT 2019}
}
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