Cross sections for trinucleon photoeffect

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.56· OSTI ID:6735752

Levinger, J S; Fitzgibbon, R

Several new examples of electric dipole transitions to final isopsin 3/2 are calculated using the Fabre-Levinger formalism: (i) the Volkov potential (Serber exchange) gives an integrated cross section 4% higher than the O'Connell-Prats sum rule; (ii) the V/sup x/ potential (zero force in odd-parity two-body states) gives a /sup 3/H photoeffect cross section close to that found by Fabre and Levinger for /sup 3/He; (iii) transitions to an uncoupled grand orbital 3 are several percent of those to grand orbital 1. Addition of the cross sections for uncoupled states gives poor agreement with the coupled calculation of Fang et al.; (iv) a V/sup x/ potential (Wigner-Bartlett exchange) gives an integrated cross section 5% higher than the Thomas-Reichl-Kuhn value. We also calculate for final isospin 1/2, neglecting coupling to two-body breakup. The V/sup x/ potential (zero force in odd-parity two-body states) gives an integrated cross section 23% higher than the O'Connell-Prats value. A Wigner-Bartlett mixture gives a 23% disagreement with the Thomas-Reiche-Kuhn sum rule. The calculated cross section (summed for both isospin states) has a higher and narrower peak than that measured by Gorbonov (summed for two-body and three-body breakup).

• Research Organization: Rensselaer Polytechnic Institute, Troy, New York 12181
• OSTI ID: 6735752
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BREAKUP REACTIONS
CROSS SECTIONS
DIPOLES
ELECTRIC DIPOLES
EQUATIONS
HELIUM 3 TARGET
ISOSPIN
MANY-BODY PROBLEM
MULTIPOLES
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
PARITY
PARTICLE PROPERTIES
PHOTONUCLEAR REACTIONS
SPHERICAL HARMONICS
SUM RULES
TARGETS
THREE-BODY PROBLEM
TRITIUM TARGET