DEUTERON-NUCLEUS INTERACTIONS AT 10 GeV/c IN BR-2 NUCLEAR EMULSIONS H. S. Virk Department of Physics, Guru Nanak Dev University, Amritsar 143 005, India Veena Verma Department of Physics, Shivalik College, Naya Nangal 140 126, India Deuteron-nucleus inelastic interactions at 10 GeV/c have been studied in BR-2 nuclear emulsions. Various parameters such as multiplicity, angular distribution, percentage composition of secondary shower particles; stripping and survival prob- ability of deuterons have been determined. INTRODUCTION A great deal of experimental work has been reported on proton-nucleus interactions above a proton kinetic energy of 1 GeV, There is still scanty data on multiparticle production in relativistic deuteron-nucleus collisions in nuclear emulsions [1-3]. In the last few years interesting results have been obtained at the JINR proton Synchrophasotron at Dubna [4] by accelerating deuterons up to 11 GeV/c and at Berkeley-Bevalac by accelerating deuterons at relativistic energies [5]. Most of the deuteron collisions have been studied for the sake of stripping reactions [6- 8]. Investigation of the general, phenomenological characteristics of deuteron-nucleus interactions seems to be of special interest to both nuclear and elementary-particle physicists. Io the present work, in addition to the conventional multiplicity and angu- lar distribution studies, an attempt has been made to estimate the stripping and survival probability for 10 GeV/c deuterons in nuclear emulsions. Because of meagre experimental data, no attempt has been made to correlate it with theoretical pre- dictions [9-11]. EXPERIMENTAL PROCEDURE BR-2 nuclear emulsion stack, consisting of pellicles of size 20 x 10 x 0.04 cm 3 was exposed to the 10 GeV/c deuteron beam at the JINR Synchrophasotron (Dubna) in 1974. The average intensity of the extracted mono-energetic beam of deuterons was about 2 x 104 particles/cm 2 with an admixture of protons less than 5700. Ten plates of this stack (D-10) were supplied to us by Professor K. D. Tolstov of JINR, Dubna. 1032 Czech. J. Phys. B 34 [1984]