TRIPLE DIFFERENTIAL CROSS-SECTION TO DISCRETE STATES IN THE O-16 (PI+, 2 P) N-14 REACTION

Wharton, W.R.; Barnes, P.D.; Bassalleck, B.; Eisenstein, R.A.; Franklin, G.; Grace, R.; Maher, C.; Pile, P.; Rieder, R.; Szymanski, J.

doi:10.1103/PhysRevC.31.526

TRIPLE DIFFERENTIAL CROSS-SECTION TO DISCRETE STATES IN THE O-16 (PI+, 2 P) N-14 REACTION

W.R. Wharton
(
- Carnegie Mellon U.
)
,
P.D. Barnes
(
- Carnegie Mellon U.
)
,
B. Bassalleck
(
- Carnegie Mellon U.
)
,
R.A. Eisenstein
(
- Carnegie Mellon U.
)
,
G. Franklin
(
- Carnegie Mellon U.
)

1985

12 pages

Published in:

Phys.Rev.C 31 (1985) 526-537

DOI:

10.1103/PhysRevC.31.526

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Abstract: (APS)

The (π+16,2p)14N reaction has been studied at Tπ=59.6 MeV. Good energy resolution of 1 to 2 MeV allows several states in N14 to be resolved. Triple-differential cross sections are presented for the transitions to the N14 1+ ground state and 1+ 4 MeV state. The quasideuteron model is used to construct a T matrix for each transition. A fit to the data requires an additional term in the T matrix giving a large anisotropy in the angular distribution of the N14 recoil momentum vector. The ground state T matrix has an unexpected enhancement near zero recoil momentum of the N14 nucleus. The ‘‘measured’’ T matrices are then used to extrapolate to unmeasured regions of phase space giving double differential, single-differential, and total cross sections for each transition.

PI+ LIGHT NUCLEUS: NUCLEAR REACTION
OXYGEN
EXCITED NUCLEUS
EMISSION: (2P)
(2P): EMISSION
DIFFERENTIAL CROSS SECTION: ENERGY DEPENDENCE
ENERGY DEPENDENCE: DIFFERENTIAL CROSS SECTION
DIFFERENTIAL CROSS SECTION: ANGULAR DEPENDENCE
ANGULAR DEPENDENCE: DIFFERENTIAL CROSS SECTION
RECOIL: MOMENTUM SPECTRUM

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