Study of the <sup>20</sup>Ne(p, γ) reaction rate using the DRAGON recoil spectrometer and GRIFFIN γ-ray detectors
ORAL
Abstract
The 1.28 Mev gamma-ray released in the beta-decay of 22Na may be observed after a nova event due to the 2.6 year half-life of 22Na. The slowest reaction of the neon-sodium cycle is the 20Ne(p,γ) reaction, which limits the production of 22Na in nova explostion. The reaction rate is mainly determined by direct capture to a barely-bound 1/2+ state in 21Na. Located 7 keV below the 20Ne+p threshold, this state is likely an excited halo state which could enhance the 20Ne(p,γ) reaction rate. Our goal is to measure the reaction rate approaching the Gamow window. Very recently, the 20Ne(p,γ) reaction was measured using the DRAGON recoil separator and six GRIFFIN HPGe detectors at TRIUMF at a center of mass energy of 550 keV. This talk will present results from this first run and plans for a second run early next spring.
*This work is partially supported by the US Department of Energy through Grant/Contract No. DE-FG03-93ER40789 (Colorado School of Mines).
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Presenters
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Madeleine Hanley
- Colorado School of Mines