^(52)Mn,^(53)Mn和^(54)Mn在磁星表面的电子俘获率

Electron Capture Rates of ^(52)Mn,^(53)Mn and ^(54)Mn at the Magnetar Surface

根据超强磁场下朗道能级量子化的近似修正并结合原子核壳层模型,我们详细计算了在不同磁星表面(密度ρ/μe=5×108mol/cm3,磁场B:4.414×1013G-4.414×1017G,温度分别为T=5×108K,T=1×109K和T=5×109K)Mn的三个同位核素的核反应52Mn→52Cr,53Mn→53Cr和54Mn→54Cr的电子俘获率.结果表明,Mn的三个同位核素在同一温度,密度和磁场的电子俘获是有所不同的(同种元素的核内核子轨道不同排布情况对电子俘获有影响),随着磁场增大(4.414×1013G-4.414×1017G),这种差异会变得越来越小;磁场(4.414×1013G-4.414×1017G)对其电子俘获的影响相当显著,最高能增加4个数量级;温度对其的电子俘获也有一定影响,但影响不大.

According to landau level quantized approximate correction in the strong magnetiv field and combined with nuclear shell model,we calculated the detailed electronic capture rates at different magnetar surfaces.（density ρ/μe =5 ×108 mol/cm3,magnetic field B：4.414 ×1013 G ～ 4.414 × 1017G,temperature were T =5 ×108k,T =1 ×109k and T =5 ×109 k） of the three Mn isotope nuclides ＇ nuclei reactions 52Mn →52Cr,and 52Mn→53Cr and 54Mn→54Cr.Theresults show that electron captures of the three Mn isotope nuclides at the same temperature,density and magnetic field are different （the same nuclide in nuclear nuclear track different configuration of electron capture influential）.Along with increasing magnetic field （4.414 × 1013 G ～ 4.414 × 1017G）,the difference will become smaller.Magnetic fields effeit （4.414 × 1013G ～ 4.414 × 1017G） on the electron capture is quite significant.Temperature also have certain effect on the electron capture,but the impact is not abvious.