Measurement of the 18Ne(α,p0) 21Na reaction cross section in the burning energy region for x-ray bursts.
- Salter, PJ
- Aliotta, M
- Davinson, T
- Al Falou, H
- Chen, A
- Davids, B
- Fulton, BR
- Galinski, N
- Howell, D
- Lotay, G
- Machule, P
- Murphy, AS
- Ruiz, C
- Sjue, S
- Taggart, M
- Walden, P
- Woods, PJ
Publication date
June 2012
DOI Publisher
American Physical Society (APS)Abstract
The 18Ne(α,p) 21Na reaction provides one of the main HCNO-breakout routes into the rp process in x-ray bursts. The 18Ne(α,p0) 21Na reaction cross section has been determined for the first time in the Gamow energy region for peak temperatures T∼2 GK by measuring its time-reversal reaction 21Na(p,α) 18Ne in inverse kinematics. The astrophysical rate for ground-state to ground-state transitions was found to be a factor of 2 lower than Hauser-Feshbach theoretical predictions. Our reduced rate will affect the physical conditions under which breakout from the HCNO cycles occurs via the 18Ne(α,p) 21Na reaction
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