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原子核形变及集体转动存在的普遍性 Ⅰ.原子核形变及磁矩

THE NTTCLEAK DEFORMATION AND THE COLLECTIVE MOTION Ⅰ.nuchear Deformation and Magnetic Moment

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【作者】 曾谨言黄锡毅周又元毛定一王恕铨王贵瑾

【Author】 1. Nuclear Deformation and Magnetic MomentTseng Chin-yuen, Huang Hsi-yi, Chou Yu-yuan, Mao Ting-yi, Wang Shu-chiian, Wang Kuei-chin(Faculty of Physies)

【机构】 北京大学物理学系理论物理教研室原子核理论组北京大学物理学系理论物理教研室原子核理论组

【摘要】 在这里我们给出一个关于原子核固有电四极矩、形变及磁矩的普查与分析工作报告;结果表明(见图1):无论是重核,轻核或者中等核,绝大多数都是非球形的,很多核的形变都不小。在若干区域中,形变普遍地较大。这些区域是: Ⅰ. A~10(4Be9 5B10 5B11等) Ⅱ.A~24(9F1l0Ne21.11Na23.12Mg24 13Al27等) Ⅲ.A~56(25Mn55 26Fe526Fe57等) Ⅳ.A~78(33As734Se734Se735Br735Br835Br82等) Ⅴ.155<A<190,稀土元素 Ⅵ.A>225,α-放射性元素 其中Ⅴ,Ⅵ及Ⅱ是早已知道的转动区,其他区域中也可能存在着转动能谱。 我们尝试采用转动模型波函数去计算轻核及中等核(A<130)的磁矩(内部粒子波函数采用了Nilsson波函数)计算结果一般都此Schmidt值好,而在相当多的地方,特别是形变较大的核,计算结果则好得多。例如F19一Al27大形变核区域便是最好的例子,这一结果加强了大形变区Ⅰ,Ⅲ,Ⅳ也是转动区的可能性。

【Abstract】 We report here a general survey and simple analysis of the nuclear intrinsic quadrapole moments, nuclear deformations and magnetic moment in the rotational model.The results show (See Fig. I) that, in general, most nuclei, including heavy, medium and light ones, are not spherical, and the deformation of many of them is not small, and in several regions the nuclear deformation is persistently large. These areⅠ. A-10, (e.g. 4Be9,6B10,5B11) Ⅱ. A-24, (e.g. 9F19,10Ne21, 11Na28,12Mg24,13Al27)Ⅲ. A-56, (e.g. 25Mn56,36Fe66,36Fe67)Ⅳ. A-78, (e.g. 33As75,84Se75,84Se79, 35Br79,35Br81,35Br82) Ⅴ. 155<A<190, rare-earth elementsⅥ. A>225, α-active nucleiwhere regions Ⅴ, Ⅵ & Ⅱ are known to possess rotational spetra. It is probable that rotational spetra may also exist in the regions Ⅰ, Ⅲ & Ⅳ. We have tentatively calculated the magnetic moments of nuclei up to A = 130, making use of the typical rotational wave function, for the internal wave function, Nilsson’s wave function is used. The calculated values are in general better than the Schmidt’s value, in many places, especially in the regions of large deformation, the agreement of the calculated value with experimental value is quite good. This fact supports the possibility that the regions of the large deformation Ⅰ, Ⅲ & Ⅳ also possess rotational spectra.

  • 【文献出处】 北京大学学报(自然科学) , 编辑部邮箱 ,1959年04期
  • 【被引频次】2
  • 【下载频次】87
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