Analyzing power and cross section distributions of the knockout reaction 208Pb(p,2p)207Tl at an incident energy of 202 MeV
Date
2002
Authors
Neveling R
Cowley AA
Steyn GF
Fortsch S.V.
Hillhouse GC
Mano J
Wyngaardt SM
Journal Title
Journal ISSN
Volume Title
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, AMSTERDAM, NETHERLANDS, 1000 AE
Abstract
Exclusive measurements of the cross section and analyzing power for the 208Pb(p→2p)207Tl proton knockout reaction at 202 MeV are presented for three quasifree angle pairs. Energy-sharing cross section distributions are found to be in excellent agreement with distorted wave impulse approximation (DWIA) calculations, yielding spectroscopic factors that are in reasonable agreement with (e,e′p) studies and theoretical expectations. The measured analyzing powers are, however, in significant disagreement with results of standard DWIA calculations that utilize the free nucleon-nucleon interaction. Analyzing power calculations are furthermore found to be insensitive to variations in the distorting potentials, different descriptions of the bound state, different energy prescriptions of the two-body interaction, and nonlocality effects. Agreement between theory and experiment is shown to improve only when the density dependence of the nucleon-nucleon interaction is incorporated within the DWIA.
Description
Natuurwetenskappe
Please help us populate SUNScholar with the post print version of this article. It can be e-mailed to: scholar@sun.ac.za
Please help us populate SUNScholar with the post print version of this article. It can be e-mailed to: scholar@sun.ac.za
Keywords
Citation
Physica C-Superconductivity and Its Applications, Elsevier issn - 5562813 - Physical Review C - Nuclear Physics, 66(3).