Angular distributions of light projectile fragments in deep inelastic Pb+Em interactions at 160 A GeV

The nuclear emulsion was exposed at CERN by the lead projectile at 160 A GeV. The angles between any pair of fragments with Z=2-4 have been measured in the emulsion plane for the events which did not contain heavy fragments. The constant characterizing the normal angle ( phi ) distribution of the fr...

Descripción completa

Detalles Bibliográficos
Autores principales: Adamovich, M I, Aggarwal, M M, Alexandrov, Yu A, Andreeva, N P, Badyal, S K, Basova, E E, Bhalla, K B, Bhasin, A, Bhatia, V S, Bradnova, V, Bubnov, V I, Cai, X, Chasnikov, I Yu, Chen, G M, Chernova, L P, Chernyavsky, M M, Dhamija, S, El-Chenawi, K F, Felea, D, Feng, S Q, Gaitinov, A S, Ganssauge, E R, Garpman, S I A, Gerassimov, S G, Gheata, A, Gheata, M, Grote, J, Gulamov, K G, Sen-Gupta, S K, Gupta, V K, Henjes, U, Jakobsson, B, Kanygina, E K, Karabova, M, Kharlamov, S P, Kovalenko, A D, Krasnov, S A, Kumar, V, Larionova, V G, Lepekhin, F G, Levitskaya, O V, Li, Y X, Liu, L S, Lokanathan, S, Lord, J J, Lukicheva, N S, Lu, Y, Luo, S B, Mangotra, L K, Manhas, I, Mittra, I S, Musaeva, A K, Nasyrov, S Z, Navotny, V S, Nystrand, J, Otterlund, I, Peresadko, N G, Qian, W Y, Qin, Y M, Raniwala, R, Rao, N K, Röper, M D, Rusakova, V V, Saidkhanov, N, Salmanova, N A, Seitimbetov, A M, Seliverstov, D M, Simonov, B B, Sethi, R, Singh, B, Skelding, D, Söderström, K, Stenlund, E, Svechnikova, L N, Svensson, T, Tawfik, A M, Tothova, M, Tretyakova, M I, Trofimova, T P, Tuleeva, U I, Vashisht, V, Vokal, S, Vrláková, J, Wang, H Q, Wang, X R, Weng, Z Q, Wilkes, R J, Yang, C B, Yin, Z B, Yu, L Z, Zhang, D H, Zheng, P Y, Zhokhova, S I, Zhou, D C
Lenguaje:eng
Publicado: 1999
Materias:
Nuclear Physics
Acceso en línea:http://cds.cern.ch/record/428732
Descripción
Sumario:The nuclear emulsion was exposed at CERN by the lead projectile at 160 A GeV. The angles between any pair of fragments with Z=2-4 have been measured in the emulsion plane for the events which did not contain heavy fragments. The constant characterizing the normal angle ( phi ) distribution of the fragment momentum projection onto the emulsion plane with respect to initial projectile momentum p/sub 0/ is found to be sigma /sub phi /=(0.37+or-0.02) mrad. Corresponding value sigma /sub 0/=(121+or-6) MeV/c of nucleon momentum distribution in the lead nucleus coincides with that expected from Fermi momentum distribution for this nucleus. The peak in the pair-angle distribution of double-charged fragments, /sup 8/Be to 2 alpha , is presented for the region of small angles (<0.1 mrad). The fraction of alpha -particles coming from the decay of the ground state /sup 8/Be is found to be (13+or-2)601130f their whole number. (14 refs).

Ejemplares similares