On the space-time difference of proton and composite particle emission in central heavy-ion reactions at 400 A MeV (CROSBI ID 86168)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kotte, R. ; Barz, H.W. ; Neubert, W. ; Plettner, C. ; Wohlfarth, D. ; Alard, J.P. ; Andronić, A. ; Averbeck, R. ; Basrak, Zoran ; Bastid, N. ; Bendarag, N. ; Berek, G. ; Čaplar, Roman ; Cindro, Nikola ; Crochet, P. ; Devismes, A. ; Dupieux, P. ; Dželalija, Mile ; Eskef, M. ; Fodor, Z. ; Gobbi, A. ; Grishkin, Y. ; Herrmann, N. ; Hildenbrand, K.D. ; Hong, B. ; Kecskemeti, J. ; Kim, Y.J. ; Kirejczyk, M. ; Korolija, Milorad ; Kowalczyk, M. ; Kress, T. ; Kutsche, R. ; Lebedev, A. ; Lee, K.S. ; Leifels, Y. ; Manko, V. ; Merlitz, H. ; Moisa, D. ; Nianine, A. ; Pelte, D. ; Petrovici, M. ; Rami, F. ; Reisdorf, W. ; De Schauenburg, B. ; Schuell, D. ; Seres, Z. ; Sikora, B. ; Sim, K.S. ; Simion, V. ; Siwek-Wilczynska, K. ; Somov, A. ; Stoicea, G. ; Vasiliev, M.A. ; Wagner, P. ; Wisniewski, K. ; Yang, J.T. ; Yushmanov, Y. ; Zhilin, A.
engleski
On the space-time difference of proton and composite particle emission in central heavy-ion reactions at 400 A MeV
Small-angle correlations of pairs of nonidentical light charged particles produced in central collisions of heavy ions in the A=100 mass region at a beam energy of 400 A MeV are investigated with the FOPI detector system at GSI Darmstadt. The difference of longitudinal correlation functions with the relative velocity parallel and anti-parallel to the center-of-mass velocity of the pair in the central source frame is studied. This method allows extracting the apparent space-time difference of the emission of the charged particles. Comparing the correlations with results of a final-state interaction model delivers quantiative estimates of these asymmetries. Time delays as short as 1 fm/c or - alternatively - source radius differences of a few tenth fm are resolved. The strong collective expansion of the participant zone introduces not only an apparent reduction of the source radius but also a modification of the emission times. After correscting for both effects a complete sequence of the space-time emission of p, d, t, 3He, 4He particles is presented for the first time.
heavy-ion ; correlation function ; space-time
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