Determining the 14O(α,p)17F astrophysical rate from Measurements at TwinSol

Physics Procedia Pub Date : 2017-01-01 DOI:10.1016/j.phpro.2017.09.043

D.W. Bardayan , T. Ahn , J.M. Allen , M. Brodeur , B. Frentz , Y.K. Gupta , M.R. Hall , O. Hall , S. Henderson , J. Hu , J.M. Kelly , J.J. Kolata , A. Long , C. Nicoloff , P.D. O’Malley , K. Ostdiek , M.K. Smith , S. Strauss , F.D. Becchetti , J. Riggins , A.M. Rogers

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Abstract

The ¹⁴O(α,p)¹⁷F reaction is an important trigger reaction to the α-p process in X-ray bursts. The most stringent experimental constraints on its astrophysical rate come from measurements of the time-inverse reaction, ¹⁷F(p,α)¹⁴O. Previous studies of this inverse reaction have sufficiently characterized the high-energy dependence of the cross section but there are still significant uncertainties at lower energies. A new measurement of the ¹⁷F(p,α)¹⁴O cross section is underway at the Twin Solenoid (TwinSol) facility at the University of Notre Dame using an in-flight secondary ¹⁷F beam. The initial results are promising but improvements are needed to complete the measurement. The initial data and plans for an improved measurement are presented in this manuscript.

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从TwinSol测量确定14o (α，p) 17f天体物理速率

14O(α，p)17F反应是x射线爆发中α-p过程的重要触发反应。对其天体物理速率最严格的实验限制来自时间逆反应17F(p，α)14O的测量。以往对该逆反应的研究已经充分表征了截面的高能依赖性，但在较低能量处仍存在显著的不确定性。圣母大学的双螺线管(TwinSol)设施正在使用飞行中的次级17F光束对17F(p，α)14O截面进行新的测量。初步结果很有希望，但要完成测量还需要改进。初步的数据和计划的改进测量是在这个手稿中提出的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Physics Procedia

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