CROSS SECTIONS OF THE INTERACTIONS OF 4He NUCLEI WITH PROTONS AT 8"6 AND 13.6 GeV/c ~) It. Braunt), A. Dirner**), J. P. Gerber]'), V. V. Glagolev, J. Hlawi6ov~**), P. Juillott), A. K. Kacharava~), K. U. Khayretdinov***), R. M. Lebedev, G. Martinsk~**), A. Michalont), M. S. Nioradzett ), J. Pato6ka**), G. D. Pestova, Z. R. Salukvadzett), M. Seman*), T. Sobczakt?t), J. Stepaniaktt?), L. Sfindor*), J. Urbfin**) Joint Institute for Nuclear Research, 141980 Dubna, USSR 4He-p collisions at two values of 4He momenta -- 8-6 GeV/c and 13.6 GeV/c -- have been studied using the one-metre JINR hydrogen bubble chamber. Total, elastic and topological cross sections have been measured. The results are in agreement with other published data. The elastic differential cross section was compared with the predictions of the Glauber model formalism. In the recent years there has been an increased interest in the collisions of hadrons and nuclei with nuclei at high energy. This was due to a general expectation of observing such exotic phenomena as pion condensate [1], cumulative or collective effects [2], new stable nuclear states [3], and the state of quark-gluon plasma [4]. There were also suggestions to produce and investigate the rare neutron-rich isotopes [5]. Here we present results of the study of the basic characteristics of CHe-p collisions at CHe momenta of 8.6 and 13.6 GeV/c. These values correspond to 2.15 and 3.4 GeV/c for the case when proton strikes a 4He fixed target. The experimental data have been obtained by means of the one-metre JINR hydrogen bubble chamber. Details of the experimental set-up have been published in [6, 7]. Beams of CHe nuclei have been accelerated in the JINR synchrophasotron. Usage of the accelerated nuclear beams impinging on the fixed proton target causes all fragments of the incoming nucleus to be fast in the laboratory frame and thus one can well measure and identify them practically without losses. On the other hand, almost all the losses due to the chamber threshold momentmn are concentrated in the elastic scattering channel. The low hydrogen density allows us to identify #) Dedicated to Academician V~iclav Votruba cn the occasion of his eightieth birthday. *) Institute of Experimental Physics, Ko#ice, Czechoslovakia. **) ~af6rik University, Ko#ice, Czechoslovakia. ***) P. N. Lebedev Physical Institute, Moscow, USSR. t) Centre de Recherches NuclOaires, Strasbourg, France. "~t) Tbilisi State University, Tbilisi, USSR. t~'~) Institute for Nuclear Studies, Warsaw, Poland. Czech. J. Phys. B 39 (1989) 1267