The debate on the Gamow-Teller (GT) strength distribution is still on the way to the final point. The GT strength distribution is desirable for the p f-shell nuclei, which is important from astrophysical point of view. We have calculated GT transitions and positron capture rates for 55Co using the proton-neutron quasiparticle random phase approximation (pn-QRPA) theory. These calculations have been done for temperatures(in 109 K) 0.01, 0.2, 0.4, 0.7, 1, 1.5, 2, 3, 7, 10, 30, and densities in the range 10 g·cm-3 and 10-11 g·cm-3. Our calculations show that the GT strength is fragmented over many final states. Our positron capture shows differences between shell model calculations at low temperature and density regions of the star, which are in good agreement at high temperature and densities regions of the stellar core.%关于伽莫夫-泰载(GT)强度分布的争论尚在继续.对于pf壳层核,GT强度分布是希望的,从天体物理的观点来看这是重要的.应用质子-中子准粒子随机相近似(pn-QRPA)理论,计算了55Co的伽莫夫-泰勒跃迁和电子俘获率.这些计算已在温度为0.01,0.1,0.2,0.4,0.7,1.5,2,3,7,10,30(以109K为单位)以及密度在10 g·cm-3和1011g·cm-3之间进行了.计算表明GT强度是在多终态上分段的.正电子俘获率与壳层模型计算的在低温和星体区是有差别的,在高温和星体核心区符合得很好.
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