A statistical approach to describe highly excited heavy and superheavy nuclei

Peng-Hui Chen; Zhao-Qing Feng; Jun-Qing Li; Hong-Fei Zhang

doi:10.1088/1674-1137/40/9/091002

Chinese Physics C> 2016, Vol. 40> Issue(9) : 091002 DOI: 10.1088/1674-1137/40/9/091002

A statistical approach to describe highly excited heavy and superheavy nuclei

Abstract
HTML
Reference
Related

PDF

Abstract：
A statistical approach based on the Weisskopf evaporation theory has been developed to describe the de-excitation process of highly excited heavy and superheavy nuclei, in particular for the proton-rich nuclei. The excited nucleus is cooled by evaporating γ-rays, light particles (neutrons, protons, α etc) in competition with binary fission, in which the structure effects (shell correction, fission barrier, particle separation energy) contribute to the processes. The formation of residual nuclei is evaluated via sequential emission of possible particles above the separation energies. The available data of fusion-evaporation excitation functions in the ²⁸Si+¹⁹⁸Pt reaction can be reproduced nicely within the approach.
- excited nucleus ,
- structure effects ,
- Weisskopf evaporation theory ,
- fusion-evaporation reactions

References

[1]	S. Hofmann and G. Mnzenberg, Rev. Mod. Phys., 72:733(2000); G. Mnzenberg, Nucl. Phys. A, 944:5(2015)
[2]	K. Morita et al, J. Phys. Soc. Jpn, 73:2593(2004); K. Morita, Nucl. Phys. A, 944:30(2015)
[3]	Y. Oganessian, J. Phys. G, 34:R165(2007); Y. Oganessian and V. K. Utyonkov, Nucl. Phys. A, 944 62:(2015)
[4]	Z. Q. Feng, G. M. Jin, F. Fu, and J. Q. Li, Nucl. Phys. A, 771:50(2006)
[5]	V. Weisskopf, Phys. Rev., 52:295(1937)
[6]	V. I. Zagrebaev, Phys. Rev. C, 67:061601(R) (2003)
[7]	R. Yanez et al, Phys. Rev. C, 88:014606(2013)
[8]	P. Mller et al., At. Data Nucl. Data Tables, 59:185(1995)
[9]	K. H. Schmidt, W. Morawek, Rep. Prog. Phys., 54:949(1991)
[10]	Z. Q. Feng, G. M. Jin, J. Q. Li, and W. Scheid, Phys. Rev. C, 76:044606(2007)
[11]	Z. Q. Feng, G. M. Jin, and J. Q. Li, Nucl. Phys. A, 816:33(2009)
[12]	A. V. Ignatyuk, K. K. Istekov, and G. N. Smirenkin, Nucl. Phys., 29:875(1979)
[13]	A. R. Junghans, M. de Jong, H. G. Clerc et al, Nucl. Phys. A, 629:635(1998)
[14]	J. D. Jackson, Can. J. Phys., 34:767(1956)
[15]	V. Zagrebaev and W. Greiner, Nucl. Phys. A, 944:257(2015)
[16]	K. Nishio, H. Ikezoe, S. Mitsuoka et al, Phys. Rev. C, 62:014602(2000)

[1]	Pei-Wei Wen , Zhao-Qing Feng , Fan Zhang , Cheng Li , Cheng-Jian Lin , Feng-Shou Zhang . Effect of positive Q-value neutron transfers on sub-barrier fusion reactions. Chinese Physics C, 2017, 41(6): 064102. doi: 10.1088/1674-1137/41/6/064102
[2]	H. Eslamizadeh , F. Bagheri . Simulation of the fission dynamics of the excited compound nuclei ²⁰⁶Po and ¹⁶⁸Yb produced in the reactions ¹²C+¹⁹⁴Pt and ¹⁸O+¹⁵⁰Sm. Chinese Physics C, 2017, 41(4): 044101. doi: 10.1088/1674-1137/41/4/044101
[3]	Manjeet Singh Gautam . Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics. Chinese Physics C, 2016, 40(5): 054101. doi: 10.1088/1674-1137/40/5/054101
[4]	H. Eslamizadeh . Study of different features of fission dynamics of ²²⁴Th produced in fusion reactions within a stochastic approach. Chinese Physics C, 2015, 39(5): 054102. doi: 10.1088/1674-1137/39/5/054102
[5]	Manjeet Singh Gautam . Static versus energy-dependent nucleus-nucleus} potential for description of sub-barrier fusion dynamics of ₈¹⁶O+₅₀^112,116,120Sn reactions. Chinese Physics C, 2015, 39(11): 114102. doi: 10.1088/1674-1137/39/11/114102
[6]	ZHANG Ao , GUO Wen-Jun , HUANG Jiang-Wei , YANG Lin-Meng . Isospin effect of the in-medium nucleon-nucleon cross section in excited nuclear reactions. Chinese Physics C, 2014, 38(5): 054103. doi: 10.1088/1674-1137/38/5/054103
[7]	WANG Hong-Min , HOU Zhao-Yu , LIU Jia-Fu , SUN Xian-Jing . Charm structure functions and gluon shadowing effects with the AdS/CFT model. Chinese Physics C, 2012, 36(8): 691-696. doi: 10.1088/1674-1137/36/8/002
[8]	WANG Deng-Xia , ZHANG Ai-Lin . Study of excited D_s mesons. Chinese Physics C, 2010, 34(9): 1387-1389. doi: 10.1088/1674-1137/34/9/049
[9]	R. G. Nazmitdinov , E. I. Shahaliev , M. K. Suleymanov . Central nucleus-nucleus collisions at relativistic energies with a new method based on Random Matrix Theory. Chinese Physics C, 2010, 34(8): 1076-1081. doi: 10.1088/1674-1137/34/8/007
[10]	Hiroyuki Kamano . Study of excited nucleon states at EBAC: status and plans. Chinese Physics C, 2009, 33(12): 1077-1084. doi: 10.1088/1674-1137/33/12/006
[11]	FENG Zhao-Qing , JIN Gen-Ming , LI Jun-Qing , Werner Scheid . Production mechanism of superheavy nuclei in massive fusion reactions. Chinese Physics C, 2009, 33(S1): 86-88. doi: 10.1088/1674-1137/33/S1/028
[12]	CAO Xi-Guang , CHEN Jin-Gen , MA Yu-Gang , FANG De-Qing , TIAN Wen-Dong , YAN Ting-Zhi , CAI Xiang-Zhou . Density effect of the neutron halo nucleus induced reactions in intermediate energy heavy ion collisions. Chinese Physics C, 2009, 33(S1): 49-51. doi: 10.1088/1674-1137/33/S1/016
[13]	GAO Yuan , DONG Jian-Min , ZHANG Hong-Fei , ZUO Wei , LI Jun-Qing . Properties and structure of N=Z nuclei within relativistic mean field theory. Chinese Physics C, 2009, 33(10): 848-853. doi: 10.1088/1674-1137/33/10/006
[14]	YANG Hong-Wei , YE Wei . Spin distribution of evaporation residue cross section within a stochastic approach. Chinese Physics C, 2008, 32(3): 182-185. doi: 10.1088/1674-1137/32/3/004
[15]	YE Wei , WU Feng . Influence of angular momentum on evaporation residue cross section as a probe of nuclear dissipation. Chinese Physics C, 2008, 32(6): 433-436. doi: 10.1088/1674-1137/32/6/004
[16]	YE Wei . Dependence of Isospin Effects of Particle Evaporation on the Nuclear Shell Structure. Chinese Physics C, 2005, 29(3): 268-272.
[17]	Liu Zhuhua , Xu Jincheng , Zhang Huanqiao , Qian Xing , Qiao Yu , Lin Chengjian , Xu Kan . Subbarrier Complete Fusion-Fission Reactions of ¹⁶O+²³²Th. Chinese Physics C, 1994, 18(S2): 121-128.
[18]	Xia Keding , Cai Yanhuang . Multipole Giant Resonances in Highly Excited Nuclei. Chinese Physics C, 1989, 13(S1): 79-86.
[19]	Wang Sufang , Cai Wei , Zheng Jiwen , Liang Guozhao . Study on the Cross Sections of the Short-Lived Evaporation Residues in Reaction ¹²C + ¹¹²Sn. Chinese Physics C, 1989, 13(S3): 303-308.
[20]	HU JI-MIN , WANG ZHENG-SHING . THE EVAPORATION MODEL THEORY FOR THE FISSION PROMPT NEUTRON SPECTRUM OF HEAVY NUCLEI. Chinese Physics C, 1979, 3(6): 772-783.

Access

Get Citation

Peng-Hui Chen, Zhao-Qing Feng, Jun-Qing Li and Hong-Fei Zhang. A statistical approach to describe highly excited heavy and superheavy nuclei[J]. Chinese Physics C, 2016, 40(9): 091002. doi: 10.1088/1674-1137/40/9/091002

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2016-04-11

Fund

Supported by Major State Basic Research Development Program in China (2015CB856903), National Natural Science Foundation of China Projects (11175218, U1332207, 11475050, 11175074), and Youth Innovation Promotion Association of Chinese Academy of Sciences

Article Metric

Article Views(1994)
PDF Downloads(165)
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

A statistical approach to describe highly excited heavy and superheavy nuclei

Corresponding author: Zhao-Qing Feng,

Received Date: 2016-04-11

Available Online: 2016-09-05

Fund Project: Supported by Major State Basic Research Development Program in China (2015CB856903), National Natural Science Foundation of China Projects (11175218, U1332207, 11475050, 11175074), and Youth Innovation Promotion Association of Chinese Academy of Sciences

Abstract: A statistical approach based on the Weisskopf evaporation theory has been developed to describe the de-excitation process of highly excited heavy and superheavy nuclei, in particular for the proton-rich nuclei. The excited nucleus is cooled by evaporating γ-rays, light particles (neutrons, protons, α etc) in competition with binary fission, in which the structure effects (shell correction, fission barrier, particle separation energy) contribute to the processes. The formation of residual nuclei is evaluated via sequential emission of possible particles above the separation energies. The available data of fusion-evaporation excitation functions in the ²⁸Si+¹⁹⁸Pt reaction can be reproduced nicely within the approach.

HTML

Reference (16)

A statistical approach to describe highly excited heavy and superheavy nuclei

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article