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- W137685255 abstract "The accurate determination of the strengths and energies of resonances in (p,alpha) reactions is important for understanding the influence of reaction cycles to element synthesis in many astrophysical environments. Thus far, (p,alpha) studies in inverse kinematics have employed solid polypropylene targets. These are not always advantageous, especially when the energy loss of the incoming beam in the solid target is significantly larger than the resonance width. At the Holifield Radioactive Ion Beam Facility, a new technique has been developed for measuring the strengths and energies of (p,alpha) reactions. In this technique, a large differentially-pumped scattering chamber is filled with hydrogen gas at pressures up to 4 Torr. No windows or foils obstruct the incoming beam and reaction products are detected in coincidence by two silicon strip arrays. The vertex of the (p,alpha) reaction is determined from the known kinematics of the alpha particle and heavy recoil. This new technique was applied to study the strength of the 183 keV resonance in O(p,alpha)N reaction that was previously reported to significantly increase the reaction rate at nova temperatures and decrease F production by as much as a factor of 10 in low-mass ONeMg novae. This larger strength was confirmed using the new technique and nova simulations showed a substantial decrease in F production in lower-mass novae though a much smaller effect was seen in higher-mass novae." @default.
- W137685255 created "2016-06-24" @default.
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- W137685255 date "2009-01-01" @default.
- W137685255 modified "2023-09-27" @default.
- W137685255 title "Development and Implementation of a New Technique to Study (p,α) Reactions Relevant to Nucleosynthesis in Binary Systems" @default.
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