Multiplicities of forward-backward particles in <SUP>16</SUP>O-emulsion interactions at 4.5 AGeV/c

LI Hui-Ling; ZHANG Dong-Hai; LI Jun-Sheng

doi:10.1088/1674-1137/33/7/004

Chinese Physics C> 2009, Vol. 33> Issue(7) : 521-527 DOI: 10.1088/1674-1137/33/7/004

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c

Abstract
HTML
Reference
Related

PDF

Abstract：
An exclusive study of the characteristics of interactions accompanied by backward emission (θ_lab≥90°) of shower and grey particles in collisions of a 4.5 AGeV/c ¹⁶O beam with emulsion nuclei is carried out. The experimental multiplicity distributions of different particles emitted in the forward (θ_lab<90°) and backward hemispheres due to the interactions with the two emulsion components (CNO, AgBr) are presented and analyzed. The correlations between the different emitted particles are also investigated. The results indicate that there are signatures for a collective mechanism, which plays a role in the production of particles in the backward hemisphere. Hence, the backward multiplicity distribution of the emitted shower and grey particles at 4.5 AGeV/c incident momentum can be represented by a decay exponential law formula independent of the projectile size. The exponent of the power was found to increase with decreasing target size. The experimental data favor the idea that the backward particles were emitted due to the decay of the system in the latter stages of the reactions.

References

[1]

. Frankfurt L L, Strikman M I. Phys. Lett. B, 1979, 83: 4972. Schroeder L S, Chessin S A, Geaga J V et al. Phys. Rev.Lett., 1997, 28: 17873. Baldin A M et al. Sov. J. Nucl. Phys., 1976, 29: 6294. Mathis H B, MENG T C. Phys. Rev. C, 1978, 18: 9525. Burov V V, Lukyanov V K, Titov A I. Phys. Lett. B, 1977,67: 466. Yukawa T, Furui S. Phys. Rev. C, 1979, 20: 23167. Fujita T, Hufner J. Nucl. Phys. A, 1979, 314: 3178. Geaga J V, Chessin S A, Grossiord J Y et al. Phys. Rev.Lett., 1980, 45: 19939. Schmidt I A, Blankenbecler R. Phys. Rev. D, 1977, 15:332110. Gorenstein M I, Zinoviev G M. Phys. Lett. B, 1977, 67:10011. Bubnov V I, Gaitinov A Sh, Eremenko L E et al. Z. Phys.A, 1981, 302: 13312. Fung S Y, Gore W, Kiernan G P et al. Phys. Rev. Lett.,1978, 41: 159213. Hecman H H, Crawford H J, Greiner D E et al. Phys. Rev.C, 1978, 17: 165114. Adamovich M I et al.(EMU01 Collaboration). Phys. Lett.B, 1990, 234: 180; Phys. Rev. Lett., 1989, 62: 262; Phys.Lett. B, 1990, 242: 51215. Fredriksson S. Phys. Rev. Lett., 1980, 45: 137116. El-Nadi M, Ali-Mossa N, Abdelsalam A. Nuovo Cimento A, 1997, 110: 125517. El-Nadi M, Abdelsalam A, Ali-Mossa N. Int. J. Mod. Phys. E, 1994, 3: 81118. El-Nadi M, Abdelsalam A, Ali-Mossa N. Radiat Phys.Chem., 1996, 47: 68119. El-Nadi M, Abdelsalam A, Ali-Mossa N et al. Eur. Phys.J. A, 1998, 3: 18320. El-Nadi M, El-Nagdy M S, Ali-Mossa N et al. Nuovo Ci-mento A, 1998, 111: 124321. El-Naghy A, Sadek N M, Mohery M. Nuovo Cimento A,1997, 110: 12522. Abdelsalam A, Shaat E A, Ali-Mossa N et al. J. Phys. G,2002, 28: 137523. Abdel-Waged K. J. Phys. G, 1999, 25: 172124. Abd-Allah N N. Int. J. Mod. Phys. E, 2002, 11: 10525. Ahmad T, Irfan M. Phys. Rev. C, 1992, 46: 148326. ZHANG D H. Chin. Phys., 2002, 11: 125427. WU F J, ZHANG D H, LI J S et al. Chin. Phys., 2004, 13:64628. LI J S, ZHANG D H, LI Z Y et al. Chin. Phys., 2004, 13:83629. ZHANG D H, LI Z Y, LI J S et al. Chin. Phys., 2004, 13:123930. Abd-Elhalim S M, Callet A. Chaos, Solitons and Fractals,2003, 18: 115

[1]	S. Kamel , W. Osman , M. Fayed . Yields of projectile fragments in sulphur-emulsion interactions at 3.7 A GeV. Chinese Physics C, 2017, 41(5): 054001. doi: 10.1088/1674-1137/41/5/054001
[2]	Z. Abou-Moussa , N. Rashed , B. M. Badawy , H. A. Amer , W. Osman , M. M. El-Ashmawy . Pion emission in α-particle interactions with varioustargets of nuclear emulsion detector. Chinese Physics C, 2015, 39(9): 094001. doi: 10.1088/1674-1137/39/9/094001
[3]	ZHANG Zhi , MA Tian-Li , ZHANG Dong-Hai . Forward-backward emission of target evaporated fragmentsin high energy nucleus-nucleus collisions. Chinese Physics C, 2015, 39(10): 104002. doi: 10.1088/1674-1137/39/10/104002
[4]	ZHANG Dong-Hai , CHEN Yan-Ling , WANG Guo-Rong , LI Wang-Dong , WANG Qing , YAO Ji-Jie , ZHOU Jian-Guo , LI Rong , LI Jun-Sheng , LI Hui-Ling . Forward-backward multiplicity correlations of target fragments in nucleus-emulsion collisions at a few hundred MeV/u. Chinese Physics C, 2015, 39(1): 014001. doi: 10.1088/1674-1137/39/1/014001
[5]	GUO Xing-Dao , ZHANG Yin-Jie , ZHAO Shu-Min , FENG Tai-Fu , YUAN Xu-Hao , LI Xue-Qian . Top quark forward-backward asymmetry in the little Higgs model. Chinese Physics C, 2014, 38(11): 113102. doi: 10.1088/1674-1137/38/11/113102
[6]	BAI Cai-Yan , ZHANG Dong-Hai . Study of compound particle production in ⁸⁴Kr-emulsion interactions at 1.7 A GeV. Chinese Physics C, 2011, 35(4): 349-354. doi: 10.1088/1674-1137/35/4/006
[7]	BAI Cai-Yan , ZHANG Dong-Hai . Projectile spectator proton production in ⁸⁴Kr- emulsion interactions at 1.7 A GeV. Chinese Physics C, 2011, 35(5): 436-440. doi: 10.1088/1674-1137/35/5/005
[8]	GAO Yan , LIU Fu-Hu , Abd Allah . Various flows of black and grey particles produced in Mg-emulsion collisions at 4.5 A GeV c. Chinese Physics C, 2011, 35(1): 40-43. doi: 10.1088/1674-1137/35/1/009
[9]	ZHANG Dong-Hai , LI Hui-Ling . Evidence of self-affine multiplicity fluctuation of target residues in ⁸⁴Kr-AgBr interactions at 1.7 AGeV. Chinese Physics C, 2009, 33(6): 407-410. doi: 10.1088/1674-1137/33/6/001
[10]	LI Jun-Sheng , ZHANG Dong-Hai , LIU Fu-Hu . Intermittent type fluctuation of target fragments produced in ¹⁶O-AgBr interactions at 4.5 AGeV/c. Chinese Physics C, 2008, 32(5): 352-355. doi: 10.1088/1674-1137/32/5/005
[11]	MENG Cai-Rong , LI Xiao-Lin , DUAN Mai-Ying . Pseudorapidity Distribution of Shower Particles in ²⁴Mg-Emulsion Collisions at 4.5A GeV/c. Chinese Physics C, 2004, 28(11): 1165-1169.
[12]	ZHANG Dong-Hai . Production of Helium Projectile Fragments in ¹⁶O-Emulsion Collisions at 60 A GeV. Chinese Physics C, 2002, 26(1): 40-45.
[13]	ZHANG Dong-Hai , SUN Han-Cheng . Investigation of the Production of Slow Particles in 60 A GeV ¹⁶O Induced Nuclear Emulsion Reaction. Chinese Physics C, 2001, 25(7): 651-657.
[14]	Yang Yongxu , Li Qingrun . Description of ¹⁶O+¹⁶O Elastic Scattering at 124MeV by a Folding Model. Chinese Physics C, 1997, 21(7): 645-647.
[15]	Li Qingrun , Yang Yongxu . A Folding Model for ¹⁶O+¹²C System. Chinese Physics C, 1996, 20(3): 277-279.
[16]	Zhang Yang , Liu Lianshou . The Forward-Backward Correlation and Clustered Production of Final-State Particles in High Energy pp Collision. Chinese Physics C, 1994, 18(Z1): 69-78.
[17]	Wang Shaoshun , Zhang Jie , Ye Yunxiu , Xiao Chenguo , Luo Qi , Cheng Zhengdong , Zhang Xueqian , Xu Wanli , Xiong Weijun . Forward-Backward Multiplicity Correlations in pp Collisions at 400 GeV/c. Chinese Physics C, 1992, 16(S4): 367-374.
[18]	WANG Qi , WANG Gao-Sheng , ZHU Yong-Tai , LI Song-Lin , WANG Xiao-Ming , WU Zhong-Li , HU Xiao-Qing , YIN Xu , XU Hu-Shan , FAN Guo-Ying , FENG En-Pu , SONG Shi-Zhan , YIN Shu-Zhi , ZHANG Zhen . THE CORRELATION BETWEEN ALPHA PARTICLES AND PROJECTILE-LIKE FRAGMENTS IN 97MeV ¹⁶O+⁵¹V REACTION. Chinese Physics C, 1990, 14(5): 451-455.
[19]	XIE Yi-Gang . RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES. Chinese Physics C, 1985, 9(5): 520-525.
[20]	LIU BO , WU ZONG-EN . A MICROSCOPIC CALCULATION OF π⁺-¹⁶O ELASTIC SCATTERING. Chinese Physics C, 1981, 5(1): 134-136.

Access

Get Citation

LI Hui-Ling, ZHANG Dong-Hai and LI Jun-Sheng. Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c[J]. Chinese Physics C, 2009, 33(7): 521-527. doi: 10.1088/1674-1137/33/7/004

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2008-10-13
Revised: 2009-01-13

Article Metric

Article Views(4223)
PDF Downloads(659)
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

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c

Corresponding author: ZHANG Dong-Hai,

Received Date: 2008-10-13

Accepted Date: 2009-01-13

Available Online: 2009-07-05

Abstract:

An exclusive study of the characteristics of interactions accompanied by backward emission (θ_lab≥90°) of shower and grey particles in collisions of a 4.5 AGeV/c ¹⁶O beam with emulsion nuclei is carried out. The experimental multiplicity distributions of different particles emitted in the forward (θ_lab<90°) and backward hemispheres due to the interactions with the two emulsion components (CNO, AgBr) are presented and analyzed. The correlations between the different emitted particles are also investigated. The results indicate that there are signatures for a collective mechanism, which plays a role in the production of particles in the backward hemisphere. Hence, the backward multiplicity distribution of the emitted shower and grey particles at 4.5 AGeV/c incident momentum can be represented by a decay exponential law formula independent of the projectile size. The exponent of the power was found to increase with decreasing target size. The experimental data favor the idea that the backward particles were emitted due to the decay of the system in the latter stages of the reactions.

HTML

Reference (1)

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c

Corresponding author: ZHANG Dong-Hai,

HTML

目录

Multiplicities of forward-backward particles in 16O-emulsion interactions at 4.5 AGeV/c

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Multiplicities of forward-backward particles in 16O-emulsion interactions at 4.5 AGeV/c

Corresponding author: ZHANG Dong-Hai,

HTML

目录

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c

Multiplicities of forward-backward particles in ¹⁶O-emulsion interactions at 4.5 AGeV/c