The two-body photodisintegration of (4)He 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 (4)He target. This is the first measurement of the photodisintegration of (4)He above 0.4 GeV. The differential cross sections for the gamma(4)He -> 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 (3)He that demonstrated the great importance of three-body mechanisms in the energy region 0.5-0.8 GeV.

Nasseripour, R., Berman, B., Benmouna, N., Ilieva, Y., Laget, J., Adhikari, K., et al. (2009). Photodisintegration of 4He into p+t. PHYSICAL REVIEW. C, NUCLEAR PHYSICS, 80(4), 044603-1-044603-11 [10.1103/PhysRevC.80.044603].

Photodisintegration of 4He into p+t

D'ANGELO, ANNALISA;PISANO, SILVIA;
2009-10-07

Abstract

The two-body photodisintegration of (4)He 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 (4)He target. This is the first measurement of the photodisintegration of (4)He above 0.4 GeV. The differential cross sections for the gamma(4)He -> 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 (3)He that demonstrated the great importance of three-body mechanisms in the energy region 0.5-0.8 GeV.
7-ott-2009
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
2-BODY PHOTODISINTEGRATION; CLAS; MECHANISMS; REGION; HE-4(GAMMA,P)H-3; NUCLEI; SYSTEM
Clas Collaboration
http://prc.aps.org/abstract/PRC/v80/i4/e044603
Nasseripour, R., Berman, B., Benmouna, N., Ilieva, Y., Laget, J., Adhikari, K., et al. (2009). Photodisintegration of 4He into p+t. PHYSICAL REVIEW. C, NUCLEAR PHYSICS, 80(4), 044603-1-044603-11 [10.1103/PhysRevC.80.044603].
Nasseripour, R; Berman, B; Benmouna, N; Ilieva, Y; Laget, J; Adhikari, K; Amaryan, M; Ambrozewicz, P; Anghinolfi, M; Baghdasaryan, H; Ball, J; Battagl...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/37851
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