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- W2239638504 abstract "The $^{14}mathrm{O}(ensuremath{alpha},p)^{17}mathrm{F}$ reaction is one of the key reactions involved in the breakout from the hot-CNO cycle to the rp-process in type-I x-ray bursts (XRBs). The resonant properties in the compound nucleus $^{18}mathrm{Ne}$ have been investigated through resonant elastic scattering of $^{17}mathrm{F}+p$. The radioactive $^{17}mathrm{F}$ beam was separated by the Center for Nuclear Study radioactive ion beam separator (CRIB) and bombarded a thick ${mathrm{H}}_{2}$ gas target at 3.6 MeV/nucleon. The recoiling light particles were measured by three $ensuremath{Delta}Etext{ensuremath{-}}E$ silicon telescopes at laboratory angles of ${ensuremath{theta}}_{mathrm{lab}}ensuremath{approx}3{}^{ensuremath{circ}},10{}^{ensuremath{circ}}$, and $18{}^{ensuremath{circ}}$. Five resonances at ${E}_{x}=6.15$, 6.28, 6.35, 6.85, and 7.05 MeV were observed in the excitation functions, and their spin-parities have been determined based on an $R$-matrix analysis. In particular, ${J}^{ensuremath{pi}}={1}^{ensuremath{-}}$ was firmly assigned to the 6.15-MeV state which dominates the thermonuclear $^{14}mathrm{O}(ensuremath{alpha},p)^{17}mathrm{F}$ rate below 2 GK. As well, a possible new excited state in $^{18}mathrm{Ne}$ was observed at ${E}_{x}=6.85ifmmodepmelsetextpmfi{}0.11$ MeV with tentative $J=0$ assignment. This state could be the analog state of the 6.880 MeV $(0{}^{ensuremath{-}})$ level in the mirror nucleus $^{18}mathrm{O}$, or a bandhead state $(0{}^{+})$ of the six-particle four-hole (6p-4h) band. A new thermonuclear $^{14}mathrm{O}(ensuremath{alpha},p)^{17}mathrm{F}$ rate has been determined, and the astrophysical impact of multiple recent rates has been examined using an XRB model. Contrary to previous expectations, we find only a modest impact on predicted nuclear energy generation rates from using reaction rates differing by up to several orders of magnitude." @default.
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- W2239638504 date "2014-08-12" @default.
- W2239638504 modified "2023-10-15" @default.
- W2239638504 title "Examination of the role of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mmultiscripts><mml:mi mathvariant=normal>O</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>14</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mrow><mml:mi>α</mml:mi><mml:mo>,</mml:mo><mml:mi>p</mml:mi></mml:mrow><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi mathvariant=normal>F</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>17</mml:mn></mml:mrow></mml:mmultiscripts></…" @default.
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- W2239638504 doi "https://doi.org/10.1103/physrevc.90.025803" @default.
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