Multistep alpha-transfer and parity dependence in large angle scattering

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.2628· OSTI ID:6040596

de Paula, L S; Canto, L F ^[1]

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1. Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21944 Rio de Janeiro, Rio de Janeiro, Brazil (BR)

The multistep {alpha}-transfer treatment of Aleixo {ital et} {ital al}. is employed in a detailed investigation of the anomalous back angle scattering of {sup 16}O+{sup 28}Si. We have improved the calculation of the propagator in the transfer channel and taken into account the coupling to elastic transfer. This way, we have obtained a good description of the experimental back scattering cross section from the barrier energy to {ital E}{sub c.m.}{approximately}50 MeV. It is shown that the rise of the cross section at {ital E}{sub c.m.}{approximately}45 MeV can be explained by parity-dependent terms in the {ital S} matrix, arising from the coupling to the elastic transfer channel. A study of the conditions for the coupling with an {alpha}-transfer channel to produce dynamical Regge poles indicates that pickup channels can be left out.

• OSTI ID: 6040596
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
BACKSCATTERING
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
COUPLING
CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ENERGY RANGE
FOUR-NUCLEON TRANSFER REACTIONS
HEAVY ION REACTIONS
MATRICES
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
PARITY
PARTICLE PROPERTIES
PROPAGATOR
REGGE POLES
S MATRIX
SCATTERING
SILICON 28 TARGET
TARGETS
TRANSFER REACTIONS