ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI

Chang Jing-ye; Li Juen-ching; Gao Yuan-yi

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2024年10月30日

Chinese Physics C> 1978, Vol. 2> Issue(1) : 67-74

ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI

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Abstract：
The energy levels, B(E2) values and gyromagnetic ratio g of some even-even nuclei have been calculated with a double band scheme of band-crossing. Based on these results, the mechanism of backbending phenomena is analyzed, and the possible criterion to distinguish the effects of shape transition, rotation-alignment and pairing collapse are also discussed.

References

[1]

A. Bohr, Rev. Mod. Phys., 48 (1976), 356; B. R. Mottelson, 来兰学术报告(1975), Phys.Sori., A10 (1974)，13.[2] A. H. Johnson et al., Phys. Lett., 34B (1971), 605; Phys. Rep., C3 (1973).[3] F. S. Stephens, Rev. Mod. Phys., 47 (1975), 43.[4] B. R. Mottelson and J. G. Valatin, PhyS. Rev. Lett., 5 (1960), 511.[5] F. S. StephenS and S. Simon, Nucl. Phys., A183 (1972), 257.[6] F.Kearn et al., J. Phys., A7 (1974), Lll, D, Ward et al., Phys. Rev. Lett., 30 (1973), 493.[7] A.Covello of al., Lett. al Nuo. Cim., 17 (1976), 87.[8] B.Boehev et al., Nucl. Phys., A267 (1976), 344.[9] D.Husar et al., Phys. Rev. Lett., 36 (1976), 1291.[10] D. Ward et al，Bull. Am. Phys. Soc., 18 (1973), 36; Phys. Lett., 44B (1973), 39.[11] H. J. Mang, In: Proc. Eur, Conf. on Nucl. Phys. with H. I. p. 75 (1976);I. Y. Lee et al.,Phys. Rev. Lett., 37 (1976), 420.[12] H.R. Andrews et al., Nucl. Phys., A219 (1974), 141; R. M. Lieder et al., Phys. Lett., 49B(1974), 161.[13] 夏蓉，原子核理论讲义.[14] 张敬业、李君清、高元义，兰州大学学报(自然科学版)，1977, 3, 6.[16] 徐躬鹅等，物理学报，25,(1976), 226.[17] C.K.Ross and Y. Negami Nucl. Phys., A211 (1973), 145;P. Thieburger, Phys. Lett., 45B(1973), 417.[18] J. H. Hamilton et al., Phys. Rev. Lett.,35(1975), 562.[19] W. Dehnhardt et al., Nucl. Phys., A225 (1974),1.[20] Yu. J. Grin, Phys. Lett., 59B (1975), 419.[21] B. Skaali et al., Nucl. Phys., A238 (1975), 159.[22] F. S. Stephens, Com. on Nucl. and Part. Phys., A6 (1976), 173.

[1]	Wu Lianao , Lou Jizhong . A New Formula for the γ-Soft Collective Excitation in Even-Even Nuclei. Chinese Physics C, 1995, 19(10): 941-944.
[2]	Sang Jianping , Liu Yong . Microscopic investigation of High-Spin States for Even-Even Nuclei(Ⅰ) Approach. Chinese Physics C, 1994, 18(10): 936-942.
[3]	XING Zheng , CHEN Xing-Qu . Phenomenological Analysis of Superdeformed Bands in Even-Even Nuclei. Chinese Physics C, 1991, 15(11): 1020-1024.
[4]	MENG Jie , YIN Chuan-Zong , LIN Xin-Wei . A Simple Formula for Backbending. Chinese Physics C, 1991, 15(12): 1109-1114.
[5]	ZHANG Jing-Ye . ON THE BACKBENDING MECHANISM OF MUITIBAND STRUCTURE IN NUCLEUS ¹⁸⁵Pt. Chinese Physics C, 1990, 14(11): 1039-1044.
[6]	ZHANG Jing-Ye , ZHONG Ji-Quan , LIAO Bi-Cheng . ON THE EDFORMATION OF THE EVEN-EVEN RARE-EARTH NUCLEI. Chinese Physics C, 1988, 12(5): 665-668.
[7]	GU Jin-Nan , YANG Shi-Jun , LI Shu-He , LIU Wen-Qin . α-BACKBENDING NUCLEON-NUCLEON CORRELATION AND DEFORMATION IN NUCLEI. Chinese Physics C, 1987, 11(2): 282-288.
[8]	WU Hua-Chuan . AN UNIFIED DESCRIPTION OF THE α-CLUSTERING AND COLLECTIVE EXCITATIONS IN HEAVY EVEN-EVEN NUCLEI. Chinese Physics C, 1986, 10(5): 605-612.
[9]	WU Chong-Shi , ZENG Jin-Yan . THE COLLECTIVE EXCITATION SPECTRA IN EVEN-EVEN DEFORMED NUCLEI (Ⅰ) THEORETICAL FORMULATION. Chinese Physics C, 1984, 8(2): 219-226.
[10]	LIAO Ji-Zhi , PU Xian-An . A NEW EXPRESSION FOR THE ROTATIONAL BANDS OF AN EVEN-EVEN NUCLEUS. Chinese Physics C, 1984, 8(4): 486-490.
[11]	GU JIN-NAN . A EXPLORATION OF FOUR BAND MIXTURE DESCRIBING THE HIGH SPIN STATES OF EVEN-EVEN NUCLEI. Chinese Physics C, 1982, 6(1): 117-122.
[12]	ZHANG XI-ZHEN , LI CHU-HSIA , . INTERACTING BOSON-FERMION MODEL AND. Chinese Physics C, 1982, 6(3): 347-354.
[13]	ZHANG XI-ZHEN , FENG REN-FA , WU XI-ZHEN , ZHUO YI-ZHONG , . THE CURRENT DISTRIBUTION IN THE BACK-BENDING REGION. Chinese Physics C, 1981, 5(1): 145-148.
[14]	GAO YUAN-YI . THE AMBIGUITY OF USING NUCLEAR PHASE DIAGRAM AS A CRITERION TO DETERMINE THE BACKBANDING MACHANISIM AT THE HIGH SPIN STATES. Chinese Physics C, 1981, 5(2): 268-272.
[15]	WU CHONG-SHI , ZENG JIN-YIAN . TWO-NUCLEON TRANSFER REACTIONS ON DEFORMED NUCLEI. Chinese Physics C, 1981, 5(4): 493-502.
[16]	Zhang Jing-ye , Zhang Xi-zhen . ON THE MECHANISM OF BACKBENDING IN NUCLEI ^162,164Er, ^164,166Yb, AND ¹⁶⁸Hf. Chinese Physics C, 1980, 4(6): 784-787.
[17]	Liao Ji-zhi . THREE BAND INTERSECTION MODEL DESCRIBING THE HIGH SPIN STATES OF EVEN-EVEN NUCLEI. Chinese Physics C, 1980, 4(5): 626-631.
[18]	Gu Jin-nan , Wang Zheng-da . THE ROTATIONAL THREE-BAND INTERACTION FOR EVEN-EVEN NUCLEI. Chinese Physics C, 1980, 4(5): 652-660.
[19]	Zhang Xi-zhen , Chen Yong-shou . QUASIPARTICLE SPECTRUM IN A ROTATING PETENTIAL AND THE BACK-BENDING PHENOMENA. Chinese Physics C, 1980, 4(1): 103-108.
[20]	CHANG JING-YE . ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI II. Chinese Physics C, 1978, 2(6): 558-561.

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Chang Jing-ye, Li Juen-ching and Gao Yuan-yi. ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI[J]. Chinese Physics C, 1978, 2(1): 67-74.

Chang Jing-ye, Li Juen-ching and Gao Yuan-yi. ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI[J]. Chinese Physics C, 1978, 2(1): 67-74. shu

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Received: 1977-08-14
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 PHENOMENA OF SOME EVEN-EVEN NUCLEI

Received Date: 1977-08-14
Accepted Date: 1900-01-01
Available Online: 1978-02-05

Abstract: The energy levels, B(E2) values and gyromagnetic ratio g of some even-even nuclei have been calculated with a double band scheme of band-crossing. Based on these results, the mechanism of backbending phenomena is analyzed, and the possible criterion to distinguish the effects of shape transition, rotation-alignment and pairing collapse are also discussed.