Effects of spin and isospin degrees of freedom for pion--nucleus scattering in the Glauber-theory

Conference · Mon Oct 01 04:00:00 EDT 1973

OSTI ID:4331962

Hess, A T; Eisenberg, J M; Gibbs, W R; Gibson, B F.V. ^[1]

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1. eds.

In lectures from the LAMPF summer school. The elastic scattering of negatively charged pions from /sup 12/C and /sup 4/He in the region of the 3,3 resonance was considered using the Glauber multiple-scattering theory. Both spin- flip excitations and charge-exchange transitions are included. It is assumed that after every two scatterings the nucleus returns to the ground state. The sum over intermediate excited states internal to the successive pairs of scatterings is evaluated using closure techniques. Antisymmetrized shell-model wave functions are used for the nuclear states, and Fermi motion effects are included in first order. The scattering series is evaluated numerically. The results indicate that at energies below the 3.3 resonance the spin and isospin degrees of freedom are important but their inclusion does not bring about agreement with experiment. Above the resonance they do help to improve agreement with the data. (auth)

• Research Organization: Univ. of Virginia, Charlottesville; Los Alamos Scientific Lab., N.Mex. (USA)
• NSA Number: NSA-29-017119
• OSTI ID: 4331962
• Report Number(s): LA--5443-C
• Country of Publication: United States
• Language: English

Related Subjects

*CARBON 12-- PION REACTIONS
*HELIUM 4-- PION REACTIONS
*PION REACTIONS-- ELASTIC SCATTERING
CHARGE EXCHANGE
DELTA-1236 RESONANCES
EXCITATION
EXCITED STATES
GLAUBER THEORY
GROUND STATES
ISOSPIN
MEV RANGE 100- 1000
MOTION
N68252* --Physics (Nuclear
Theoretical)--Nuclear Properties & Reactions
A <= 5--Nuclear Reactions & Scattering
N68352 --Physics (Nuclear
Theoretical)--Nuclear Properties & Reactions
6 <= A <= 19--Nuclear Reactions & Scattering
PIONS MINUS
RESONANCE
SHELL MODELS
SPIN