Photodisintegration of $^4$He into p+t
Abstract
The two-body photodisintegration of He into a proton and a triton has been studied using the CEBAF Large-Acceptance Spectrometer (CLAS) at Jefferson Laboratory. Real photons produced with the Hall-B bremsstrahlung-tagging system in the energy range from 0.35 to 1.55 GeV were incident on a liquid He target. This is the first measurement of the photodisintegration of He above 0.4 GeV. The differential cross sections for the He reaction have been measured as a function of photon-beam energy and proton-scattering angle, and are compared with the latest model calculations by J.-M. Laget. At 0.6-1.2 GeV, our data are in good agreement only with the calculations that include three-body mechanisms, thus confirming their importance. These results reinforce the conclusion of our previous study of the three-body breakup of He that demonstrated the great importance of three-body mechanisms in the energy region 0.5-0.8 GeV .
Keywords
Cite
@article{arxiv.0907.3433,
title = {Photodisintegration of $^4$He into p+t},
author = {R. Nasseripour and B. L. Berman and N. Benmouna and Y. Ilieva and J. -M. Laget},
journal= {arXiv preprint arXiv:0907.3433},
year = {2010}
}
Comments
13 pages submitted in one tgz file containing 2 tex file and 22 postscrip figures