Nuclear Masses and Nuclear Shape Transitions in Z=50—71

HUANG Ye-Cheng; LI Wei-Sheng; GAN Zai-Guo

Chinese Physics C> 1991, Vol. 15> Issue(4) : 336-342

Nuclear Masses and Nuclear Shape Transitions in Z=50—71

Institute of Modern Physics,Academia Sinica,Lanzhou 730000

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Abstract：
Some parameters and the β equation of Johansson mass formula were modified.In the fit to the experimental masses and two-neutron separation energies (S_2n) of 640 nuclides in the region of 50≤Z≤71,four free parameters are presented.The root-mean-square deviation of the mass values and S_2n are 0.827MeV and 0.406MeV respectively.The characters of transition from spherical to deformed shapes (N>90) are also reproduced by the curves of S_2n.

References

[1]

S. A. E. Johansson, Arkiv for Fyrik, 22(1962), 414.[2] S. A. E. Johansson et al., Arkiv for Fysik, 36(1967), 353.[3] S. A. E. Johansson et al., AMCO-7, P. 429 -435, Edited by 0. Klepper, Darmstadt, 1984.[4] L. Spanier et al., Atomic Data and Nuclear Dara Tables, 39(1988), 259.[5] R. Bengtsson P. Moller et al., Physics Scnpta, 29(1984), 402.[6] M. A. Preston et al., Structure of Nucleus, P. 571, 1975.[7] S. Raman et al., Atomic Data and Nuclear Data Tables, 36(1987), 18.[8] A. H. Wapstra et al., Atomic Data arid Nuclear Data Tables, 39(1988), 281.[9] G. Audi et al., AMCO-7, P. 124, Edited by O. Klepper Darmstadt, 1984.[10] A. H. Wapstra et al., Nucl. Physics, A432(1985), 57-139.[11] S. Liras et al., Atomic Data and Nuclear Data Tables, 17(1976), 431-441.[12] P. E. Haustein, Nuclear Far From Stability, (V) P. 56 Ontario, Canada 1987.

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HUANG Ye-Cheng, LI Wei-Sheng and GAN Zai-Guo. Nuclear Masses and Nuclear Shape Transitions in Z=50—71[J]. Chinese Physics C, 1991, 15(4): 336-342.

HUANG Ye-Cheng, LI Wei-Sheng and GAN Zai-Guo. Nuclear Masses and Nuclear Shape Transitions in Z=50—71[J]. Chinese Physics C, 1991, 15(4): 336-342. shu

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Received: 1900-01-01
Revised: 1900-01-01

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