Abstract
We investigate 158A GeV 207Pb projectile fragmentation on Al target using CR-39 nuclear track detectors. A stack containing target-detectors assembly was irradiated at SPS-CERN. After chemical etching, detectors were scanned using an optical microscope to collect the data in the form of etched cone heights. From the cone height measurements, total and partial charge changing cross sections of 207Pb projectiles on aluminum target are determined. The results are compared with both relevant published measurements available in the literature and model predictions. Odd-even effect in the formation of the fragments of 158A GeV 207Pb pro-jectiles is observed in a consistent and a clear manner over the observed range of fragments (Z=63-81). This is achieved by using optimized etching and track measurement conditions.
Highlights
Nuclear projectile fragmentation at relativistic energies provides an insight into some aspects of nuclear structure, especially the peripheral structure of the nucleus
We investigate 158A GeV 207Pb projectile fragmentation on Al target using CR-39 nuclear track detectors
Experimental results on fragmentation properties of relativistic energy projectiles are relevant for nuclear physics, cosmic ray physics and astrophysics
Summary
Nuclear projectile fragmentation at relativistic energies provides an insight into some aspects of nuclear structure, especially the peripheral structure of the nucleus. Optimized experimental etching conditions provided the improved results compared with our previous investigations in a way that odd-even effect has been observed in a clear and consistent manner over the observed range of fragments of 158 A GeV Pb nuclei (Z = 63 - 81) in comparison with our previous reports [10,11]. This is an important observation which is achieved through optimization of experimental conditions details of which are given in sections 2 and 3.
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