Physical Review C
The two-body photodisintegration of 4He into a proton and a triton has been studied using the CEBAF Large-Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. 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 4He target. This is the first measurement of the photodisintegration of 4He above 0.4 GeV. The differential cross sections for the γ 4He →pt reaction were 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 3He that demonstrated the great importance of three-body mechanisms in the energy region 0.5−0.8 GeV.
Original Publication Citation
Collaboration, C., Nasseripour, R., Berman, B. L., Benmouna, N., Ilieva, Y., Laget, J. M., . . . Zhao, Z. W. (2009). Photodisintegration of 4HE into p+t. Physical Review C, 80(4), 044603. doi:10.1103/PhysRevC.80.044603
0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)
CLAS Collaboration; Amaryan, M. J.; Careccia, S. L.; Dodge, G. E.; Hyde, C. E.; Kuhn, S. E.; Mayer, M.; Nepali, C. S.; Niroula, M. R.; Seraydaryan, H.; Tkachenko, S.; Weinstein, L.B.; and Zhang, J., "Photodisintegration of 4HE into p+t" (2009). Physics Faculty Publications. 353.