FIZIKA B 4 (1995) 2, 137-144

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ESTIMATION OF CHARGE OF HEAVY COSMIC-RAY PARTICLES USING THE d-RAY COUNTING METHOD IN FUJI ET-7B NUCLEAR EMULSION

BASUDHARA BASU, RENA MAJUMDAR, PRATIBHA PAL, DEBA PRASAD BHATTACHARYYA and MASAMI FUJII*
Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India,
*Faculty of Engineering, Aomori University, Aomori 030, Japan

Received 24 October 1994
Revised manuscript received 5 April 1995

The range distribution of d-rays produced by heavy nuclei of energy 5 GeV/n in Fuji ET-7B nuclear emulsion has been investigated using data from an exposure to primary cosmic rays in a balloon-borne plastic-emulsion chamber. The estimated d-ray densities per 100 mm for projectiles of charges Z = 14, 20 and 26 are in accord with the low-range simulation results of Ichimura et al.

UDC 539.12
PACS 96.40-z
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