Chinese Physics C > 2005, Vol. 29 > Issue(7): 673-676

New Formula for Spontaneous Fission Half-lives of Heavy Nuclei

Department of Physics, Nanjing University,Nanjing 210008,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator,Lanzhou 730000,China

Abstract
HTML
Reference
Related

PDF

Abstract：
Systematic calculations on spontaneous fission half-lives of heavy nuclei are carried out by Swiatecki's formula with renewed parameters and by its generalized form. A new formula with only four parameters is also proposed for spontaneous fission half-lives.Experimental half-lives are well reproduced by the three formulae. We have found from systematics of available data that there is a long lifetime line of spontaneous fission N=Z+52 for heavy elements with Z≥90. The new formula can be used to predict the spontaneous fission half-lives of heavy nuclei not far away from this long lifetime line.

References

[1]

. Bohr N, Wheeler J A. Phys. Rev. , 1939, 56: 4262. Flerov, Petrjak. Phys. Rev. , 1940, 58: 893. Seaborg G T. Phys. Rev. , 1952, 88: 14294. Swiatecki W J. Phys. Rev. , 1955, 100: 9375. Vandenbosch R, Huizenga J R. Nuclear Fission. New York: Academic Press, 1973. 16. Mller P, Nix J R, Swiatecki W J.Nucl . Phys. , 1989, A492: 3497. Audi G, Wapstra A H. Nucl. Phys. , 2003, A729: 38. Lilley J. Nuclear Physics. Chichest er: Wiley, 2002. 419. Holden N E, Hoffman D C. Pure. Appl. Chem. , 2000, 72: 152510. Viola V E, Seaborg G T. J. Inorg. Nucl. Chem. , 1966, 28: 74111. REN Zhong-Zhou, XU Chang, WANG Zai-Jun. Phys. Rev. , 2004,C70: 03430412. Hofmann S, Münzenberg G.Rev. Mod. Phys. , 2000, 72: 73313. XU Chang, REN Zhong-Zhou. Phys. Rev. , 2004, C69: 024614

[1]	SONG Yu-Shou,LUO Wei,TANG Li-Guang,HU Bi-Tao. The Application of Fission Fragments Chamber in Direct Measurement of Heavy Λ Hypernucear Lifetime. Chinese Physics C, 2007, 31(8): 755-759.
[2]	DONG Tie-Kuang,REN Zhong-Zhou. Calculations of α-Decay Half-Lives by the Generalized Viola-Seaborg Formula. Chinese Physics C, 2006, 30(2): 113-117.
[3]	LIU Ling,LU Kun,BAO Jing-Dong. Dynamic Back-Streaming Effects around Fusion and Fission Barriers of Heavy Nuclei. Chinese Physics C, 2004, 28(8): 854-858.
[4]	ZHANG Shuang-Quan,MENG Jie,ZHOU Shan-Gui,ZENG Jin-Yan. A New Formula of Nuclear Charge Radii. Chinese Physics C, 2002, 26(3): 252-258.
[5]	BAO Shang-Lian,LIU Wen-Long,WEN Chen-Lin,FAN Tie-Shuan,,. Measurement of²⁴⁸Cm/²⁵²Cf Cf Spontaneous Prompt Fission Neutron Spectrum. Chinese Physics C, 2001, 25(4): 304-308.
[6]	Hu Zuoxian,Zeng Jinyan. Comparison Between the Harris and ab Expressions for the Descriptionof Nuclear Superdeformed Rotation Bands. Chinese Physics C, 1998, 22(5): 446-451.
[7]	Wang Shuhua,Zhou Zuoxu,Chai Zhengwei. Improvement on Momentum Distribution Formula of Relativistic Heavy Ion Fragments. Chinese Physics C, 1998, 22(2): 106-110.
[8]	Wu Lianao,Liu Gang. A New Formula for the Spectra of Axial Symmetric and Transition Nuclei and a Quantity to Identify the Nuclear γ Deformation. Chinese Physics C, 1996, 20(4): 339-344.
[9]	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.
[10]	YUAN Shuang-Gui,ZHANG Tian-Mei,XU Shu-Wei,LI Zong-Wei,PAN Qiang-Yan,ZHAO Zhi-Zheng,YANG Wei-Fan,ZHANG Xue-Qian,LI Wei-Sheng,YIN Xi-Jin,DU Yi-Fei,WANG Yi-Hao. The Synthesis and Identification of New Neutron-Rich Heavy Nuclide²³⁷Th. Chinese Physics C, 1993, 17(10): 959-960.
[11]	LIU Guo-Xing,CHEN Ke-Liang,ZHENG Ji-Wen,WANG Su-Fang,BAI Xing-Ping,YU Xian,FAN Zhi-Guo. MEASUREMENT OF FISSION FRAGMENT ANGULAR DISTRIBUTION IN HEAVY-IONS INDUCED REACTION. Chinese Physics C, 1989, 13(8): 733-739.
[12]	HUANG Hai-Xin,LIN Xin-Wei,ZENG Jin-Yan. COMPARISON BETWEEN HARRIS AND WU-ZENG'S FORMULAS FOR ROTATIONAL SPECTRA OF DEFORMED NUCLEI. Chinese Physics C, 1989, 13(8): 744-751.
[13]	TANG Xiao-Wei. ON THE SPONTANEOUS PION EMISSION BY HEAVY NUCLEI. Chinese Physics C, 1988, 12(5): 584-586.
[14]	DAI Guang-Xi,WANG Zheng-Da. THE SHAPE OF FISSION SCISSION POINT. Chinese Physics C, 1985, 9(5): 622-624.
[15]	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.
[16]	HE Ze-Jun,LI Pan-Lin,ZHANG Jia-Ju. DIFFUSION MODEL OF HEAVY NUCLEUS FISSION. Chinese Physics C, 1983, 7(5): 611-617.
[17]	ZHANG HUAN-QIAO,DING SHENG-YUE,LIU ZU-HUA,ZHANG GUI-SHAN,LIU ZHAO-MING,TANG XIO-WEI,LI HUAN-TIE. EXPERIMETAL SEARCH FOR HIGH ENERGY γ RAYS IN THE SPONTANEOUTANEOUS FISSIONS OF²⁵²Cf. Chinese Physics C, 1982, 6(4): 491-494.
[18]	He Ze-jun,Li Pan-lin. TRANSPORT MODEL OF HEAVY NUCLEUS FISSION. Chinese Physics C, 1980, 4(5): 640-648.
[19]	Zheng Jin-yan,Cheng Tan-sheng,Yang Fu-jia. FURTHER STUDY ON NUCLEAR MASS FORMULA. Chinese Physics C, 1980, 4(5): 632-639.
[20]	ZHANG JING-SHANG,ZHO YI-ZHONG,LU ZHAO-QI,ZHENG YU-MING. MICROSCOPIC STUDY FOR SPONTANEOUS FISSION OF⁸Be. Chinese Physics C, 1979, 3(5): 610-615.

Access

Get Citation

XU Chang, REN Zhong-Zhou and WANG Zai-Jun. New Formula for Spontaneous Fission Half-lives of Heavy Nuclei[J]. Chinese Physics C, 2005, 29(7): 673-676.

XU Chang, REN Zhong-Zhou and WANG Zai-Jun. New Formula for Spontaneous Fission Half-lives of Heavy Nuclei[J]. Chinese Physics C, 2005, 29(7): 673-676. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2004-11-12
Revised: 1900-01-01

Article Metric

Article Views(4118)
PDF Downloads(530)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

New Formula for Spontaneous Fission Half-lives of Heavy Nuclei

Corresponding author:REN Zhong-Zhou,

Department of Physics, Nanjing University,Nanjing 210008,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator,Lanzhou 730000,China

Received Date:2004-11-12
Accepted Date:1900-01-01
Available Online:2005-07-05

Abstract:Systematic calculations on spontaneous fission half-lives of heavy nuclei are carried out by Swiatecki's formula with renewed parameters and by its generalized form. A new formula with only four parameters is also proposed for spontaneous fission half-lives.Experimental half-lives are well reproduced by the three formulae. We have found from systematics of available data that there is a long lifetime line of spontaneous fission N=Z+52 for heavy elements with Z≥90. The new formula can be used to predict the spontaneous fission half-lives of heavy nuclei not far away from this long lifetime line.