THE PYGMY RESONANCE AND SPIN-ISOSPIN OSCILLATION IN THE MASS REGION (A≤208)

Fu De-ji; Xia Ke-ding

Chinese Physics C> 1980, Vol. 4> Issue(2) : 228-235

THE PYGMY RESONANCE AND SPIN-ISOSPIN OSCILLATION IN THE MASS REGION (A≤208)

Fu De-ji ,
Xia Ke-ding

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Abstract：
The p-h calculation of 1^- states and its E1 transition probabilities in Pb²⁰⁸ ismade with different types of two-body forces. The same, calculation is made for Hg²⁰⁰,Pt¹⁹⁴, W¹⁸⁴ using BCS wave function as basis vectors. The agreement between ob-servation and calculation is quite well in the general trend. In addition the calcu-lations demonstrate the de-coupling of E1 transitions of low l-configurations fromthe giant dipole resonance, the spin-isospin oscillation at lower energy and the effectof spin-orbit coupling force on the pygmy resonance.

References

[1]

G. A. Bartholowmew, E. D, Earle, A. J. Ferguson, J. W. Knowles and M. A. Lone, Advances in Nuclear Physics, (Plenum Press, New York), Vol. 7(1973), p. 229.[2] A. M. Lane, Proc. Second Int.Symp. on Neutron Capture Gamma Ray Spertroecopy and Related Topic, 1974, Petten, the Netherlands, p. 31.[3] B.Gyarmati, A. M. Lane and J. Zimanyi, Physics Letter, 50B(1974), 316.[4] A.M. Lane, Annals of Physics, 63(1971), 171.

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Fu De-ji and Xia Ke-ding. THE PYGMY RESONANCE AND SPIN-ISOSPIN OSCILLATION IN THE MASS REGION (A≤208)[J]. Chinese Physics C, 1980, 4(2): 228-235.

Fu De-ji and Xia Ke-ding. THE PYGMY RESONANCE AND SPIN-ISOSPIN OSCILLATION IN THE MASS REGION (A≤208)[J]. Chinese Physics C, 1980, 4(2): 228-235. shu

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Received: 1978-09-04
Revised: 1900-01-01

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