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Enhancement of the Triple Alpha Rate in a Hot Dense Medium
Physical Review Letters ( IF 8.6 ) Pub Date : 2017-09-15 00:00:00 , DOI: 10.1103/physrevlett.119.112701
Mary Beard , Sam M. Austin , Richard Cyburt

In a sufficiently hot and dense astrophysical environment the rate of the triple-alpha (3α) reaction can increase greatly over the value appropriate for helium burning stars owing to hadronically induced deexcitation of the Hoyle state. In this Letter we use a statistical model to evaluate the enhancement as a function of temperature and density. For a density of 106gcm3 enhancements can exceed a factor of 100. In high temperature or density situations, the enhanced 3α rate is a better estimate of this rate and should be used in these circumstances. We then examine the effect of these enhancements on production of C12 in the neutrino wind following a supernova explosion and in an x-ray burster.

中文翻译:

热致密介质中三重Alpha速率的增强

在足够热和稠密的天体物理环境中,三重α(3α)由于强子引起的Hoyle态激发,反应可以大大超过适合氦燃烧星的值。在这封信中,我们使用统计模型来评估增强与温度和密度的关系。密度为106G厘米-3 增强效果可能超过100倍。在高温或高密度情况下,增强效果 3α比率是对此比率的更好估计,应在这些情况下使用。然后,我们研究了这些增强功能对生产的影响。C12 在超新星爆炸后的中微子风中和在X射线爆发器中。
更新日期:2017-09-15
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