Quenching of Cross Sections in Nucleon Transfer Reactions
Abstract
Cross sections for proton knockout observed in (e,e'p) reactions are apparently quenched by a factor of ~0.5, an effect attributed to short-range correlations between nucleons. Here we demonstrate that such quenching is not restricted to proton knockout, but a more general phenomenon associated with any nucleon transfer. Measurements of absolute cross sections on a number of targets between 16O and 208Pb were analyzed in a consistent way, with the cross sections reduced to spectroscopic factors through the distorted-wave Born approximation with global optical potentials. Across the 124 cases analyzed here, induced by various proton- and neutron-transfer reactions and with angular momentum transfer l=0-7, the results are consistent with a quenching factor of 0.55. This is an apparently uniform quenching of single-particle motion in the nuclear medium. The effect is seen not only in (d,p) reactions but also in reactions with A=3 and 4 projectiles, when realistic wave functions are used for the projectiles.
Keywords
Cite
@article{arxiv.1307.1178,
title = {Quenching of Cross Sections in Nucleon Transfer Reactions},
author = {B. P. Kay and J. P. Schiffer and S. J. Freeman},
journal= {arXiv preprint arXiv:1307.1178},
year = {2013}
}
Comments
5 pages, 3 figures, accepted to Physical Review Letters