Proton emission in Au+Au collisions at 6, 8, and 10.8 GeV/nucleon

被引：30

作者：

Back, BB

Betts, RR

Chang, J

Chang, WC

Chi, CY

Chu, YY

Cumming, JB

Dunlop, JC

Eldredge, W

Fung, SY

Ganz, R

Garcia, E

Gillitzer, A

Heintzelman, G

Henning, WF

Hofman, DJ

Holzman, B

Kang, JH

Kim, EJ

Kim, SY

Kwon, Y

McLeod, D

Mignerey, AC

Moulson, M

Nanal, V

Ogilvie, CA

Pak, R

Ruangma, A

Russ, DE

Seto, RK

Stanskas, PJ

Stephans, GSF

Wang, HQ

Wolfs, FLH

Wuosmaa, AH

Xiang, H

Xu, GH

Yao, HB

Zou, CM

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Brookhaven Natl Lab, Upton, NY 11973 USA

[3] Univ Calif Riverside, Riverside, CA 92521 USA

[4] Columbia Univ, Nevis Labs, Irvington, NY 10533 USA

[5] Univ Illinois, Chicago, IL 60607 USA

[6] Univ Maryland, College Pk, MD 20742 USA

[7] MIT, Cambridge, MA 02139 USA

[8] Univ Rochester, Rochester, NY 14627 USA

[9] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW C | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.66.054901

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Transverse mass spectra of protons emitted in Au+Au collisions at beam energies of 6, 8, and 10.8 GeV/nucleon have been measured as a function of collision centrality over a rapidity range 0.5<y(lab)<1.5. The spectra are well reproduced by Boltzmann distributions over the measured transverse mass region, which allows for extrapolation of the data to derive the rapidity density and apparent temperature of the emitting source. The shapes of the rapidity distributions suggest significant transparency or substantial longitudinal expansion in even the most central collisions at all three beam energies. The data are analyzed within a simple thermal source plus longitudinal expansion model.

引用

页数：10

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