Supernova matter at subnuclear densities as a resonant Fermi gas: enhancement of neutrino rates.
Supernova matter at subnuclear densities as a resonant Fermi gas: enhancement of neutrino rates.
复制标题
作为共振费米气体的亚核密度超新星物质：中微子速率的增强
DOI：
10.1103/physrevlett.113.081101
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发表时间：
2014
影响因子：
8.6
通讯作者：
A. Schwenk
中科院分区：
文献类型：
--
作者：
A. Bartl;C. J. Pethick;A. Schwenk
在低能量下，核子-核子相互作用是共振的，因此超新星物质在亚核密度下与原子气体有许多相似之处，其相互作用由费什巴赫共振主导。我们计算的速率中微子过程涉及核子核子碰撞，并表明，这些都是增强的中子和质子的混合物在亚核密度由于大的散射长度。因此，中微子对韧致辐射和吸收的速率明显大于超新星模拟中使用的速率。
At low energies nucleon-nucleon interactions are resonant and therefore supernova matter at subnuclear densities has many similarities to atomic gases with interactions dominated by a Feshbach resonance. We calculate the rates of neutrino processes involving nucleon-nucleon collisions and show that these are enhanced in mixtures of neutrons and protons at subnuclear densities due to the large scattering lengths. As a result, the rate for neutrino pair bremsstrahlung and absorption is significantly larger belowcompared to rates used in supernova simulations.