Emission Time of Light Particles with Respect to Measurement Angle

LIU Yong-Ying; WANG Su-Fang; DUAN Li-Min; JIN Gen-Ming; ZHU Hai-Dong; ZHANG Bao-Guo; WEN Wan-Xin; LI Zu-Yu; HE Zhi-Yong; WANG Hong-Wei; XIAO Zhi-Gang; WU He-Yu; WEI Zhi-Yong

Chinese Physics C> 2001, Vol. 25> Issue(11) : 1065-1070

Emission Time of Light Particles with Respect to Measurement Angle

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Particle particle correlation functions at small correlation angle have been measured for ⁴⁰Ar+⁹³Nb collision at E 25MeV/u. Based on three body trajectory calculation the emission time scale of light particles has been extracted from correlation function of two particles at small relative momentum. The mean emission time scale decreases with increasing sum of the kinetic energies of the particles in a correlated pair. It decreases from about 500 fm/c for low energy particles to about 50 fm/c for high energy particles. And the extracted emission time scales from larger detection angle are longer than that extracted from the data obtained at small detection angle, which can be explained as the more particles emitted from equilibrated system.

References

[1]

. Elmaani A ,Ajitanand N N ,Alexander J M et al.Phys.Rev.,1991,C43:R2474—24782. Elmaani A ,Alexander Jhon M ,Ajitanand N N et al.Phys.Rev.,1994,C49:284—297 3. JIN GenMing,HE ZhiYong.Nuclear Physics Review,1998,15(1):1—9(in Chinese)(靳根明,贺智勇.原子核物理评论,1998,15(1):1—9) 4. HE ZhiYong,JIN GenMing,LI ZuYu et al.Acta Phys.Rev.,1998,57(4):1824—18315. XI HongFei,ZHAN WenLong,ZHU YongTai et al.Nucl.Phys.,1993,A552:281—292 6. DUAN LiMin,WANG SuFang,ZHANG BaoGuo et al.High Energy Phys.and Nucl.Phys.,1998,22(9):780—786(in Chinese)(段利敏,王素芳,张保国等.高能物理与核物理,1998,22(9):780—786) 7. Pochodzalla J,Gelbke C K ,Lynch W G et al.Phys.Rev.,1987,C35:1695—17198. Elmaani A ,Ajitanand N N ,Ethvignot T et al.Nucl.Instr.and Meth.,1992,A313:401—412 9. Elmaani A ,Alexander Jonn M .Phys.Rev.,1993,C47:1321—132410. Bauge E ,Elmaani A ,Lacey Roy A et al.Phys.Rev.Lett.,1993,70:3705—370811. HE ZhiYong,DUAN LiMin,LI ZuYu et al.High Energy Phys.and Nucl.Phys.,1996,20(1):8—12(in Chinese)(贺智勇,段利敏,李祖玉等.高能物理与核物理,1996,20(1):8—12)12. de Young P D ,Gordon M S ,LU XiuQin et al.Phys.Rev.,1989,C39:128—131 13. Hanbury Brown R ,Twiss R Q .Nature,1956,178:1046—1048 14. Koonin S E .Phys.Lett.,1977,B70:43—47

[1]	GUO Zhi-Yu , XU Rong , MING Jian-Chuan , ZOU Yu-Bin , GAO Shu-Li , ZHAO Jie , PENG Shi-Xiang , WU Wen-Zhog , QIAN Feng , SONG Zhi-Zhong , YU Jin-Xiang , YUAN Zhong-Xi , YU Mao-Lin . Measurement Techniques of High-Current Ion Beam Emittance. Chinese Physics C, 2008, 32(S1): 148-150.
[2]	YE Wei . Particle Evaporation in the Fission Process of Nuclei ^100,104Sn. Chinese Physics C, 2006, 30(3): 217-219.
[3]	YANG Guo-Jun , ZHANG Zhuo , CHEN Si-Fu , LIU Cheng-Jun , LIN Yu-Zheng . Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method. Chinese Physics C, 2005, 29(2): 191-196.
[4]	YE Wei . Effects of Isospin on Multiplicity of Prescission Particles of Light Fissioning Systems. Chinese Physics C, 2004, 28(1): 73-77.
[5]	ZHANG Gao-Long , YE Yan-Lin , JIANG Dong-Xing , ZHENG Tao , WANG Quan-Jin , LI Zhi-Huan , LI Xiang-Qing , CHEN Zhi-Qiang , HU Qing-Yuan , PANG Dan-Yang , WANG Jia . Observation of Light Particle Emission at Backward Angles in the Reaction Induced by 25MeV/u⁶He from⁹Be Target. Chinese Physics C, 2004, 28(5): 451-454.
[6]	WEN Wan-Xin , JIN Gen-Ming . Influence of Complex Particle Emission on Properties of Giant Dipole Resonance of Hot Nuclei. Chinese Physics C, 2003, 27(1): 44-47.
[7]	YE Wei . Isotopic Effects in Prescission Particle Emission. Chinese Physics C, 2003, 27(3): 233-237.
[8]	XIA Xiao-Mi , WANG Man , FANG Jian , ZHOU Li , LAI Yuan-Fen , LU Jun-Guang . Emission Time Measurements for Plastic Scintillating Fibers. Chinese Physics C, 2003, 27(7): 619-622.
[9]	WANG Shu-Hong , YE Qiang , CAO Jian-She , MA Li , LIU Yu-Cheng , LE Qi , PEI Guo-Xi , ZHANG Jia-Fei . Emittance Measurement by Multi-Changing Focusing Strength. Chinese Physics C, 2002, 26(11): 1184-1188.
[10]	WANG Meng , WANG Jian-Song , GUO Zhong-Yan , XIAO Guo-Qing , ZHAN Wen-Long , LI Jia-Xing , SUN Zhi-Yu , CHEN Zhi-Qiang , WANG Wu-Sheng , TIAN Wen-Dong , MAO Rui-Shi . Isospin Effects on the Yield of LCPs in the Reaction of RNB. Chinese Physics C, 2002, 26(8): 803-808.
[11]	Ye Wei , Shen Wenqing , Feng Jun , Ma Yugang , Wang Jiansong , Cai Xiangzhou , Wu Xizhen , Feng Renfa , Lu Zhongdao . Effect of Fission Path on Prescission Particle Emission. Chinese Physics C, 1998, 22(7): 639-645.
[12]	Wang Zhaomin , Xu Zizong , Wu Chong . Study on the Background in Single Photon Time Measurement. Chinese Physics C, 1998, 22(6): 486-491.
[13]	Han Jiaxiang , Xu Zizong , Chen Hongfang , Li Cheng , Zeng Hui . Single Photon Time Spectra in Gas Avalanches. Chinese Physics C, 1996, 20(10): 885-889.
[14]	He Zhiyong , Jin Genming , Li Zuyu , Duan Limin , Wu Heyu , Dai Guangxi , Zhang Baoguo , Wen Wanxin , Qi Yujin , Luo Qingzheng . Emission Time of Light Particles and Lifetime of Hot Nuclei Followed by Binary Fission. Chinese Physics C, 1996, 20(7): 596-600.
[15]	He Zhiyong , Duan Limin , Li Zuyu , Jin Genming , Luo Qingzheng , Wu Heyu , Zhang Baoguo , Wen Wanxin , Qi Yujin , Dang Bingrong , Dai Guangxi . Emission Time Measurements of Light Particles from ⁴⁰Ar+¹⁹⁷Au Collisions in Intermediate Energies. Chinese Physics C, 1996, 20(1): 8-12.
[16]	BES Collaboration . Precise Measurement of τ Mass. Chinese Physics C, 1995, 19(2): 97-105.
[17]	XI Hong-Fei , ZHAN Wen-Long , ZHU Yong-Tai , GUO Zhong-Yan , HU Xiao-Qing , LIU Guan-Hua , ZHOU Jian-Qun , YIN Shu-Zhi , ZHAO You-Xong , WEI Zhi-Yong , FAN En-Jie . Light Charged Particle Correlation Measurement in Intermediate Energy Heavy Ion Reactions. Chinese Physics C, 1993, 17(3): 268-275.
[18]	KONG Ling-Jiang , LI Qing-Run . SIGNIFICANT EFFECT ON THE BINDING ENERGY OF ⁵He BY THE CHANGE OF THE INTERNAL ENERGY OF THE α PARTICLE. Chinese Physics C, 1990, 14(6): 519-524.
[19]	SHEN Wen-Qing , ZHAN Wen-Long , ZHU Yong-Tai , YIN Shu-Zhi , GUO Zhong-Yan , QI Wei-Min , FAN Guo-Ying , JIN Gen-Ming , LI Song-Lin , ZHANG Zhen , ZHANG Yu-Hu . COINCIDENCE MEASUREMENT BETWEEN α-PARTICLES AND PROJECTILE-LIKE FRAGMENTS IN REACTION OF 82.7MeV ¹⁶O ON ²⁷Al. Chinese Physics C, 1987, 11(1): 104-110.
[20]	YU CHEN , LUO KAI-YUAN , PENG HUA-SHOU , LI ZHONG-ZHEN , TIAN DE-YUAN , HU JIA-WEI . MEASUREMENT OF DELAY TIME DISTRIBUTION OF MULTI-WIRE PROPORTIONAL CHAMBERS. Chinese Physics C, 1979, 3(5): 604-609.

Access

Get Citation

LIU Yong-Ying, WANG Su-Fang, DUAN Li-Min, JIN Gen-Ming, ZHU Hai-Dong, ZHANG Bao-Guo, WEN Wan-Xin, LI Zu-Yu, HE Zhi-Yong, WANG Hong-Wei, XIAO Zhi-Gang, WU He-Yu and WEI Zhi-Yong. Emission Time of Light Particles with Respect to Measurement Angle[J]. Chinese Physics C, 2001, 25(11): 1065-1070.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2001-11-28
Revised: 1900-01-01

Article Metric

Article Views(3403)
PDF Downloads(611)
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

Emission Time of Light Particles with Respect to Measurement Angle

Corresponding author: LIU Yong-Ying,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2001-11-28

Accepted Date: 1900-01-01

Available Online: 2001-11-05

Abstract: Particle particle correlation functions at small correlation angle have been measured for ⁴⁰Ar+⁹³Nb collision at E 25MeV/u. Based on three body trajectory calculation the emission time scale of light particles has been extracted from correlation function of two particles at small relative momentum. The mean emission time scale decreases with increasing sum of the kinetic energies of the particles in a correlated pair. It decreases from about 500 fm/c for low energy particles to about 50 fm/c for high energy particles. And the extracted emission time scales from larger detection angle are longer than that extracted from the data obtained at small detection angle, which can be explained as the more particles emitted from equilibrated system.

HTML

Reference (1)

Emission Time of Light Particles with Respect to Measurement Angle

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article