Shape of collective flow in highly central Au(150 AMeV)+Au collisions (CROSBI ID 77377)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Roy, C. ; Kuhn, C. ; Coffin, J.P. ; Crochet, P. ; Fintz, P. ; Guillaume, G. ; Jundt, F. ; Maazouzi, C. ; Rami, F. ; Tizniti, L. ; Wagner, P. ; Alard, J.P. ; Amouroux, V. ; Basrak, Zoran ; Bastid, N. ; Belyaev, I. ; Best, D. ; Biegansky, J. ; Buta, A. ; Čaplar, Roman ; Cindro, N. ; Dona, R. ; Dupieux, P. ; Dželalija, Mile ; Fan, Z.G. ; Fodor, Z. ; Fraysse, L. ; Gobbi, A. ; Herrmann, N. ; Hildenbrand, K.D. ; Holbling, Sven ; Hong, B. ; Jeong, S.C. ; Kecskemeti, J. ; Kirejczyk, M. ; Koncz, P. ; Korchagin, Y. ; Kotte, R. ; Lebedev, A. ; Legrand, I. ; Leifels, Y. ; Manko, V. ; Mgebrishvili, G. ; Moisa, D. ; Mosner, J. ; Neubert, W. ; Pelte, D. ; Petrovici, M. ; Pinkenburg, C. ; Pras, P. ; Reisdorf, W. ; Ritman, J.L. ; Sadchikov, A.G. ; Schull, D. ; Seres, Z. ; Sikora, B. ; Simion, V. ; Smolyankin, V. ; Sodan, U. ; Trzaska, M. ; Vasiliev, M. ; Wang, G.S. ; Wessels, J.P. ; Wienold, T. ; Wohlfarth, D. ; Zhilin, A. ; Konopka, J. ; Stocker, H.
engleski
Shape of collective flow in highly central Au(150 AMeV)+Au collisions
Using the FOPI facility at GSI, charged particles (1 less than or equal to Z less than or equal to 6) produced in the Au(150 A MeV)+Au reaction have been measured at laboratory angles 1.2(0) < Theta(lab) < 30(0). Highly central collisions have been selected with two criteria, both dealing with the longitudinal and transverse degrees of freedom of the reaction. The relevance of this selection method is supported by QMD calculations which indicate that such criteria are able to select mean impact parameters less than 2 fm. Bias effects introduced by the criteria have been evaluated. The centre-of-mass polar angle distributions of low energy clusters emitted in these central collisions, have been extracted : the intensity ratio deduced for a transverse to longitudinal emission is found to be R=1.4(-0.4)(+0.2). Model comparisons using QMD are presented. The value of R appears to depend sensitively on the nucleon-nucleon cross section, sigma(nn). Within this model, a value of sigma(nn)=25+/-5 mb is derived.
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Podaci o izdanju
358 (1)
1997.
73-80-x
objavljeno
0939-7922
10.1007/s002180050278
