The European Physical Journal A

ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)

Table of Contents

Abstract Volume 2 Issue 3 (1998) pp 295-300

heavy ion physics: Production of fragments with Z \geq 8 in interaction of 12.7 GeV ⁴He+U, Pb, Au and Ag: track detector study

Z. Todorovic (1), S. Savovic (2), S. Jokic (3)

(1) Institute of Physics, P. O. Box 68, 11080 Belgrade, Yugoslavia
(2) Faculty of Science, P. O. Box 60, 34000 Kragujevac, Yugoslavia
(3) Institute of Nuclear Sciences "Vinca", 11101 Belgrade, Yugoslavia

Received: 28 November 1997 / Revised version: 24 April 1998

Abstract: The processes of production of fragments with Z \geq 8 in the interaction of 12.7 GeV ⁴He with U, Pb, Au and Ag have been analyzed using the polycarbonate track detector Makrofol. The sandwich technique was used which enables direct observation of multiply charged fragment emission by a single nucleus. The decay channels ending with one, two, or more (three, four) fragments were detected. A classification scheme based on the multiplicity of heavy fragments with Z > 20 was used in order to identify the events belonging to the different reaction channels. The cross sections, excitation energies and multiplicities of intermediate-mass fragments 8 \leq Z \leq 20 have been determined for the various reaction mechanisms, and their variation as a function of the target mass has been investigated.

PACS: 25.55.-e ³H-, ³He-, and ⁴He-induced reactions - 25.70.P₂ Multifragment emission and correlations - 25.85.Ge Charged-particle-induced fission

Communicated by B. Povh

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Online publication: July 16, 1998
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