O15(α,γ)Ne19Breakout Reaction and Impact on X-Ray Bursts

Spectroscopy ofNe19for the thermonuclearO15(α,γ)Parikh1, Laird2, Séréville3 et al. 2015Phys. Rev. C167231View full textAdd to dashboardCite

“…A new measurement to both confirm the α decay branching ratios reported in Ref. [25], as well as to determine the α decay branching ratios of the 4.14 and 4.20 MeV levels separately, would help to improve new estimates of the 15 O(α, γ) 19 Ne rate. Our data also indicate the presence of several of the predicted 19 Ne levels near the 18 F+p threshold [12].…”

Level structure of18Ne and its importance in the14O(α,pTan1, Aprahamian2, Bucher3 et al. 2012Phys. Rev. CSelf Cite172150View full textAdd to dashboardCite

“…3. The reaction products were measured by an array of 16 liquid organic scintillation detectors which measured the neutrons from the reaction 16 O( 3 He,n) and a Low Energy Silicon-strip detector Array (LESA) [12,13] which was used to measure the charged particle decays from the resonance levels in 18 Ne. The neutron detector array was placed 3.6 meters away from the center of the reaction chamber covering an angular range from 11 • to 39 • .…”

Level structure of30S and its importance in the26Si(α,pTan1, Aprahamian2, Beard3 et al. 2012Phys. Rev. CSelf Cite140350View full textAdd to dashboardCite

“…The level structure of 30 S is key to understanding the αp-and the rp-processes since it plays a crucial role in the calculation of the 29 P(p,γ) and 26 Si(α,p) reaction rates. These two reaction rates are by themselves important to understanding explosive hydrogen burning environments like novae and X-ray bursts.…”

“…Some of these grains have been identified to be of nova origin [8]. The 29 Si and 30 Si abundances are good indicators of the peak temperatures achieved in the explosions and of the dominant nuclear paths followed in the course of a thermonuclear runaway leaving a clear imprint on the overall composition of the ejecta [9]. In order to interpret the Si abundance measurements, the thermonuclear reaction rates affecting Si production in novae are needed.…”

“…In order to interpret the Si abundance measurements, the thermonuclear reaction rates affecting Si production in novae are needed. One of these relevant reaction rates is the 29 P(p,γ) 30 S reaction rate. This reaction rate affects the direct flow away from 29 Si (the product of the β + -decay of 29 P) and towards 30 Si via the reaction chain 29 P(p,γ) 30 S(β + ) 30 P(β + ) 30 Si [10].…”