Photodisintegration of ⁴HE into p+t

Authors

CLAS Collaboration
M. J. Amaryan, Old Dominion UniversityFollow
S. L. Careccia, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
C. E. Hyde, Old Dominion UniversityFollow
S. E. Kuhn, Old Dominion UniversityFollow
M. Mayer, Old Dominion University
C. S. Nepali, Old Dominion University
M. R. Niroula, Old Dominion University
H. Seraydaryan, Old Dominion University
S. Tkachenko, Old Dominion University
L.B. Weinstein, Old Dominion UniversityFollow
J. Zhang, Old Dominion University

Document Type

Article

Publication Date

2009

DOI

10.1103/PhysRevC.80.044603

Publication Title

Physical Review C

Volume

80

Issue

4

Pages

044603 (1-11)

Abstract

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.

Comments

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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

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)

Repository Citation

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.
https://digitalcommons.odu.edu/physics_fac_pubs/353