Chinese Physics C > 1980, Vol. 4 > Issue(6): 784-787

ON THE MECHANISM OF BACKBENDING IN NUCLEI^162,164Er,^164,166Yb, AND¹⁶⁸Hf

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Abstract：
Grosse, Stephens and Diamond stated out, basd on the analysis of the behavior ofbackbending in odd A nuclei, the mechanism of backbending for even-even neighborscan be determined. In fact, however, there exist some difficulties. For instance, it is unable to deter-mine the mechanism of backbending for nuclei Er, Yb and Hf throughsuch an analysis. In this letter, using HFB Cranking model, the aligned angular mo-mentum i(ω) and critical rotation frequency ω _chave been calculated with some con-sideration of the blocking effect. Through a comparison between theoretical resultsand experimental data, it can be concluded that the backbending occuring in these nuc-lei is mainly caused by the rotation alignment of a vi _13/2pair, not πh _9/2pair.

References

[1]

E. Grosse, F. S. Stephens and R. M. Diamond. Phys. Rev. Lett., 31(1993), 840.[2] B. Mottelson and J. G. Valatin, Phys. Rev. Lett., 5(1960), 511.[3] F. S. Stephens and R. S. Simon, Nucl. Phys., A183(1970), 157. F. S. Stephens, Rev. Mod. Phss.,47(1975), 43.[4] 张敬业(待发表).[5] C. Foin et al., Nucl. Phys., A289(1977), 77.[6] C. Foin et al., Phys. Rev. Lett., 35(1975), 1697.[7] C. Foin et al., Nucl. Phys., A199(1973), 129; Phys. Rev. Lett., 33(1974),1049.[8] L. Richer et al., Phys. Lett., 71B(1977), 74.[9] I. Rezonka et al., Phys. Rev., C11(1975), 1767.[10] S. A. Hiarth et al 引自文献[5].[11] R. M. Lieder and H. Ryde, Adv. Nucl. Phys., V10, chap. 1;B. Bochec et al., Nucl.Phys., A267(1976), 344; ibid,A282(1977), 159.[12] 张敬业、李君清、高元义,高能物理与核物理,2(1978).67;张敬业,高能物理与核物理,2(1978),558.[13] 徐躬藕、张敬业,Nucl. Phys., A (1980).[14] A. Bohr and B. Mottelson. Proc. Conf, Nucl. Phys., Tokyo (1977), p. 157.[15]张敬业,高能物理与核物理,4(1950).[16j张锡珍、张敬业.原子核物理,(1980).[17]张敬业、张锡珍(待发表).[18] I. Hamamoto, Nucl. Phys., A271(1976), 15[19] R. Bengtsson and S. Frauendorf, Nordita ProDrint 78/45.[20]张锡珍、陈永寿.高能物理与核物理,4(1980),103,[21] R. A. Borensen, Rev. Mod. Phys.,45(1973), 353.

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Zhang Jing-ye and Zhang Xi-zhen. ON THE MECHANISM OF BACKBENDING IN NUCLEI ^162,164Er, ^164,166Yb, AND ¹⁶⁸Hf[J]. Chinese Physics C, 1980, 4(6): 784-787.

Zhang Jing-ye and Zhang Xi-zhen. ON THE MECHANISM OF BACKBENDING IN NUCLEI ^162,164Er, ^164,166Yb, AND ¹⁶⁸Hf[J]. Chinese Physics C, 1980, 4(6): 784-787. shu

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Received: 1980-04-22
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

ON THE MECHANISM OF BACKBENDING IN NUCLEI^162,164Er,^164,166Yb, AND¹⁶⁸Hf

Zhang Jing-ye
Zhang Xi-zhen

Received Date:1980-04-22
Accepted Date:1900-01-01
Available Online:1980-12-05

Abstract:Grosse, Stephens and Diamond stated out, basd on the analysis of the behavior ofbackbending in odd A nuclei, the mechanism of backbending for even-even neighborscan be determined. In fact, however, there exist some difficulties. For instance, it is unable to deter-mine the mechanism of backbending for nuclei Er, Yb and Hf throughsuch an analysis. In this letter, using HFB Cranking model, the aligned angular mo-mentumi(ω) and critical rotation frequencyω_chave been calculated with some con-sideration of the blocking effect. Through a comparison between theoretical resultsand experimental data, it can be concluded that the backbending occuring in these nuc-lei is mainly caused by the rotation alignment of avi_13/2pair, notπh_9/2pair.