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, αetc) 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]	Xiao-Jun Chen,Xin-Yue Jia,Zi-Han Wang,Niu Wan,Zhao-Qing Feng. Production of heavy proton-rich nuclei and kinetic energy spectra of light nuclei in fusion-evaporation reactions. Chinese Physics C, 2026, 50(4): 044112.doi:10.1088/1674-1137/ae37f1
[2]	F. Koyuncu,A. Soylu. Screening effects on¹²C+¹²C fusion reaction. Chinese Physics C, 2018, 42(5): 054106.doi:10.1088/1674-1137/42/5/054106
[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]	Long Zhu,Jun Su,Ching-Yuan Huang,Feng-Shou Zhang. Effects of entrance channel on fusion probability in hot fusion reactions. Chinese Physics C, 2016, 40(12): 124105.doi:10.1088/1674-1137/40/12/124105
[5]	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
[6]	CAO Dong-Liang,REN Zhong-Zhou,DONG Tie-Kuang. A theoretical study of halo structure using elastic proton-nucleus scattering. Chinese Physics C, 2013, 37(3): 034103.doi:10.1088/1674-1137/37/3/034103
[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]	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
[9]	BIAN Bao-An,ZHANG Feng-Shou. Effects of the entrance channel mass asymmetry in fusion reactions. Chinese Physics C, 2010, 34(10): 1602-1608.doi:10.1088/1674-1137/34/10/010
[10]	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
[11]	ZHENG Yong-Nan,ZHOU Dong-Mei. Nuclear structure of proton-rich unstable nucleus²⁸P studied by g-factor measurement. Chinese Physics C, 2009, 33(S1): 215-217.doi:10.1088/1674-1137/33/S1/069
[12]	WANG Yan-Zhao,ZHANG Hong-Fei,GAO Yong-Hua,HOU Zhao-Yu,DONG Jian-Min,DUAN Chun-Gui,ZUO Wei. Quark distributions in nuclei and nuclear effects on nucleon structure functions. Chinese Physics C, 2009, 33(4): 263-268.doi:10.1088/1674-1137/33/4/005
[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]	LU Fei,HUA Hui,YE Yan-Lin,LI Zhi-Huan,JIANG Dong-Xing,MA Li-Ying,GE Yu-Cheng,ZHENG Tao,SONG Yu-Shou,LI Xiang-Qing,Qureshi Faisal-Jamil. Study of the structure of borromean nucleus¹⁷Ne. Chinese Physics C, 2009, 33(S1): 170-172.doi:10.1088/1674-1137/33/S1/054
[15]	ZHANG Gao-Long,LE Xiao-Yun. Double folding model calculation applied to fusion reactions. Chinese Physics C, 2008, 32(10): 812-815.doi:10.1088/1674-1137/32/10/009
[16]	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
[17]	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
[18]	YE Wei. Dependence of Isospin Effects of Particle Evaporation on the Nuclear Shell Structure. Chinese Physics C, 2005, 29(3): 268-272.
[19]	Zhuang Pengfei,Liu Lianshou. Nonlinear Effects and Target Mass Dependence in High Energy Nucleus-Nucleus Collisions. Chinese Physics C, 1990, 14(S2): 179-187.
[20]	Wang Sufang,Cai Wei,Zheng Jiwen,Liang Guozhao. Study on the Cross Sections of the Short-Lived Evaporation Residues in Reaction¹²C +¹¹²Sn. Chinese Physics C, 1989, 13(S3): 303-308.

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(3906)
PDF Downloads(167)
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,αetc) 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 the²⁸Si+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