Recoil Properties of Fragments Formed in the 4.4 GeV Deuteron-Induced Reaction on Gold target

TL;DR

This study investigates the recoil properties of nuclear fragments produced when 4.4 GeV deuterons interact with a gold target, providing new experimental data and analyzing multiple reaction mechanisms such as spallation, fission, and fragmentation.

Contribution

It presents new experimental recoil data for 90 nuclei in deuteron-gold reactions and analyzes the mechanisms involved using the two-step vector model formalism.

Findings

Evidence of multiple reaction mechanisms including spallation, fission, and fragmentation.

Fission significantly contributes to products with mass numbers 65 to 120.

Kinematic characteristics differ from proton-induced reactions on gold.

Abstract

The recoil properties of fragments produced by the interaction of 4.4 GeV deuteron with 197Au target have been studied. New experimental data on recoil properties for 90 nuclei, varying from 24Na to 198Au, were obtained. The technique applied was the {thick-target thick-catcher} and induced activity method. The deuteron beam was obtained from the Nuclotron of the Laboratory of High Energies (LHE), Joint Institute for Nuclear Research (JINR), Dubna. The experimental data were analyzed on the basis of the standard two-step vector model formalism. From this analysis we could find evidence to support the existence of several different mechanisms, such as spallation, fission and fragmentation, in the reaction investigated. Fission contributed appreciably to the formation of products in the mass region of 65 < A < 120. The kinematic characteristics of residual nuclei formed in the present deuteron-induced reaction have been compared to those from proton-induced reactions with gold target.