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首页> 外文期刊>Physics of atomic nuclei >Neutrino-Antineutrino Pair Emission From Thermally Excited Nuclei in Stellar Collapse
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Neutrino-Antineutrino Pair Emission From Thermally Excited Nuclei in Stellar Collapse

机译:恒星塌陷中热激发核的中微子-反中微子对发射。

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摘要

We examine the rate of neutrino-antineutrino pair emission by hot nuclei in collapsing stellar cores. The rates are calculated assuming that only allowed charge-neutralGamow-Teller (GT_0) transitions contribute to the decay of thermally excited nuclear states. To obtain the GT_0 transition matrix elements, we employ the quasiparticle random phase approximation extended to finite temperatures within the thermo field dynamics formalism. The decay rates and the energy emission rates are calculated for the sample nuclei ~(56)Fe and ~(82)Ge at temperatures relevant to core collapse supernovae.
机译:我们研究了坍塌的恒星核中热核的中微子-抗中微子对发射速率。假定只有中性电荷中性伽莫-泰勒(GT_0)跃迁有助于热激发核态的衰变,才能计算出速率。为了获得GT_0过渡矩阵元素,我们在热场动力学形式主义中采用了扩展到有限温度的准粒子随机相近似。计算了与核塌陷超新星有关的温度下样品核〜(56)Fe和〜(82)Ge的衰减率和能量发射率。

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