A MICROSCOPIC ANALYSIS OF THE DIFFERENCE IN ANGULAR MOMENTUM BETWEEN EXCITED AND GROUND BANDS

  • An analysis for various components included in the difference of angular momentum between excited and ground bands, i(ω), is done carefully. It is pointed out that, generally, i(ω) should read as i(ω)=iRAL(ω)+iPR(ω)+iSC(ω). And the i(ω). corresponding to s-band of the first backbanding in even-even nuclei is really not only the iRAL(ω). The various components in i(ω) corresponding to s-band for three typical nuclei 164Er, 188Hg and 156Er are estimated quantitatively and microscopicly by using cranked shell model. For well deformed nuclei, iRAL plays the dominant role, but the contribution of pairing reduction, iPR, can not be neglected. As for the soft nuclei like 188Hg, the contribution from shape changes, iSC, is very important. While for transitional nuclei as 156Er, both pairing reduction and shape changes will play substantial role.
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  • [1] Bohr and Mottelsson, Proc. Conf. Nucl. Struc., Tokyo, (1977).[2] R. Bengtsson and S. Frauendorf, Nucl. Phys., A314(1979), 27.[3] L. L. Riedinger, Invited Talk at Nordic Meeting on Nucl. Phys. August 16-20, 1982, Fuglso,Denmark.[4] 张锡珍, 张敬业, 原子核物理, 4(1980), 297.[5] 张敬业, 高能物理与核物理, 4(1980), 382.[6] Jing-ye Zhang (张敬业), Slides Report of Workshop on High spin states, Riso (1931), p. 94.[7] 徐躬, 张敬业, 高能物理与核物理, 3(1979), 232.R. Bengtsson, Jing-ye Zhang (张敬业) and S. Aberg. Phys. Lett., 105B(1981), 5.R. Bengtsson, I. Ragnarsson, Jing-ye Zhang (张敬业) and S. Aberg, Oontribut,ion to 4th Inter.Conf. Nucl. far from tab. Hebingor, Denmark, 7-9 June (1981), p. 509.[8] R. Bengtsson and Jig-ye Zhang (张敬业), Phys. Lett., to be published.[9] J. H. Hamilton et al., Phys. Rev. Lett., 35(1975), 562.[10] C. Giinther et al., Z. Phys., A301(1981), 119.M. Guttormsen et al., Nucl. Phys., A383(1982), 541.[11] Jing-ye Zhang (张敬业) and L. L. Biedinger. Contr. Nordic Meeting on Nucl. Phys, 16-20Aug., 1982, p. 64.[12] R. V. F. Janssens. P. Chowhury, H. Emling, D. Frekers, T. L. moo, W. Kuhn, Y. H. chang, P.J. Daly, Z. W. Grahowski, M. Kertelahti, J. Macneil, Jing-ye Zhang (张敬业)and G. Lennder,Contr. to Meeting on High Spin States, Oak Ridge Nov. 1982.[13] I. Ragnarsson, 私人通讯, (1981), 4.[14] R. Bengtsson, Y. S. Chen, Jing-ye Zhang (张敬业) and S. Aberg, Nucl. Phys., A(1983). in press.[15] S. Frauendorf, invited Talk to Workshop of Nuclear Phys., Treiste Oet. (1981).
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ZHANG Jing-Ye. A MICROSCOPIC ANALYSIS OF THE DIFFERENCE IN ANGULAR MOMENTUM BETWEEN EXCITED AND GROUND BANDS[J]. Chinese Physics C, 1984, 8(3): 346-351.
ZHANG Jing-Ye. A MICROSCOPIC ANALYSIS OF THE DIFFERENCE IN ANGULAR MOMENTUM BETWEEN EXCITED AND GROUND BANDS[J]. Chinese Physics C, 1984, 8(3): 346-351. shu
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Received: 1900-01-01
Revised: 1900-01-01
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A MICROSCOPIC ANALYSIS OF THE DIFFERENCE IN ANGULAR MOMENTUM BETWEEN EXCITED AND GROUND BANDS

    Corresponding author: ZHANG Jing-Ye,
  • Institute of Modern Physics

Abstract: An analysis for various components included in the difference of angular momentum between excited and ground bands, i(ω), is done carefully. It is pointed out that, generally, i(ω) should read as i(ω)=iRAL(ω)+iPR(ω)+iSC(ω). And the i(ω). corresponding to s-band of the first backbanding in even-even nuclei is really not only the iRAL(ω). The various components in i(ω) corresponding to s-band for three typical nuclei 164Er, 188Hg and 156Er are estimated quantitatively and microscopicly by using cranked shell model. For well deformed nuclei, iRAL plays the dominant role, but the contribution of pairing reduction, iPR, can not be neglected. As for the soft nuclei like 188Hg, the contribution from shape changes, iSC, is very important. While for transitional nuclei as 156Er, both pairing reduction and shape changes will play substantial role.

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