Measurement of pion photoproduction at threshold on /sup 6/Li

Journal Article · Fri Apr 01 04:00:00 EST 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.1415· OSTI ID:7308889

Audit, G; Bloch, A; de Botton, N; Schuhl, C; Tamas, G; Tzara, C; Deutsch, J; Favart, D; Prieels, R; Van Oystaeyen, B

We remeasured with improved technique the positive-pion photoproduction yield on /sup 6/Li near threshold and up to 7.2 MeV above it. If the total cross section of the reaction ..gamma.. + p ..-->.. ..pi../sup +/ + n is expressed as sigma/sub p/ = aq/k, our result for the reaction ..gamma.. + /sup 6/Li ..-->.. ..pi../sup +/ + /sup 6/He/sub g. s./ near threshold is sigma/sub Li/ = (0.098 +- 0.004)(aq/k) ) (12.5/q)/(exp(12.5/q) - 1)), where q is the pion and k the photon c.m. momenta expressed in units of MeV/c. Deviations from this expression above threshold and the contribution of ..gamma.. + /sup 6/Li ..-->.. ..pi../sup +/ + /sup 6/He (1.8 MeV) were also observed. The full understanding of this result requires further theoretical work and complementary experiments on the A = 6 nuclear system.

• Research Organization: DPhN/HE, Centre d'Etudes Nucleaires de Saclay, 91190 Gif-sur-Yvette, France
• OSTI ID: 7308889
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOSONS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
EVEN-EVEN NUCLEI
HADRONS
HELIUM 6
HELIUM ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM 6 TARGET
MESONS
NUCLEAR REACTIONS
NUCLEI
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
PIONS PLUS
PSEUDOSCALAR MESONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
TARGETS
THRESHOLD ENERGY
TOTAL CROSS SECTIONS