Positive pion production by protons

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

OSTI ID:4354662

Miller, G A; Gibbs, W R; Gibson, B F.V. ^[1]

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1. eds.

In lectures from the LAMPF summer school. A model ia used in which the pion is produced by an incident proton to examine the /sup 12/C(p, pi /sup +/)/ sup 13/C and Be(p, pi /sup +/)/sup 10/Be reactions at 185 MeV. The recent Uppsala data is fit with a DWBA calculation which takes the pion's distortion from the Kisslinger potentlal. This is the first calculation in which the same optical potential is used to fit both the elastic and (p, pi /sup +/) data; and which also uses the free pion--nucleon coupling constant at the interaction vertex. This reaction is also sensitive to details of nuclear structure because of the large momentum transfer involved. Components of the final nucleus which consist of a single particle of high angnlar momentum coupled to an excited state of the target may play an important role in this process. Such components are taken into account by considering a (p,p') reacti on which excites the target. The pion is then emitted by the p'. In a detatled calculation it is shown that for pion production at 185 MeV this effect produces a 10% decrease in the cross section. In a more approximate treatment, it is alao shown that at higher energies this two-step process is very important. (auth)

• Research Organization: Carnegie-Mellon Univ., Pittsburgh; Los Alamos Scientific Lab., N.Mex. (USA)
• NSA Number: NSA-29-017142
• OSTI ID: 4354662
• Report Number(s): LA--5443-C
• Country of Publication: United States
• Language: English

Related Subjects

*BERYLLIUM 9-- PROTON REACTIONS
*CARBON 12-- PROTON REACTIONS
*PIONS PLUS-- PARTICLE PRODUCTION
*PROTON REACTIONS
ANGULAR MOMENTUM
COUPLING CONSTANTS
CROSS SECTIONS
DWBA
EXCITED STATES
INTERACTIONS
LINEAR MOMENTUM TRANSFER
MEV RANGE 100-1000
N68352* --Physics (Nuclear
Theoretical)--Nuclear Properties & Reactions
6 <= A <= 19--Nuclear Reactions & Scattering
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR STRUCTURE
NUCLEONS
OPTICAL MODELS
PIONS