用推广的Viola-Seaborg公式计算α衰变寿命

来源 :高能物理与核物理 | 被引量 : 0次 | 上传用户：liujun87654

【摘要】

：

根据Audi等编评的最新核数据表,对Z≥84,N≥128的核的α衰变实验寿命用Viola-Seaborg公式进行最小方差拟合,得到一套新参数.用新拟合参数计算的偶偶核的衰变寿命与实验寿命很

【作者】

：

董铁矿任中洲

【机构】

：

南京大学物理系,兰州重离子加速器国家实验室原子核理论中心

【出处】

：

高能物理与核物理

【发表日期】

：

2004年期

【关键词】

：

Viola-Seaborg公式阻塞因子角动量

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根据Audi等编评的最新核数据表,对Z≥84,N≥128的核的α衰变实验寿命用Viola-Seaborg公式进行最小方差拟合,得到一套新参数.用新拟合参数计算的偶偶核的衰变寿命与实验寿命很好地符合,平均偏差1.3倍.而对奇A和奇奇核理论寿命与实验寿命相差较远.考虑到处于基态时奇A和奇奇核与偶偶核的主要区别在于自旋和宇称,对Viola-Seaborg公式做了推广.在公式中引入了离心势垒(即α粒子轨道角动量)对衰变寿命的影响.由推广公式计算的奇A和奇奇核的寿命与实验寿命平均偏差2.5倍,最大偏差5-6倍.

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用推广的Viola-Seaborg公式计算α衰变寿命

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