THE ANGULAR DISTRIBUTION OF THE PHOTOPRODUCTION OF POSITIVE PIONS FROM HYDROGEN BY 187 Mev $gamma$-RAYS
Journal Article
·
· Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B
OSTI ID:4751187
The differential cross section for pi /sup +/ photoproduction from hydrogen by gamma rays of laboratory energy 187 Mev was measured at four angles. Two identical counter systems, designed to detect low energy pions unambiguously in intense electron and gamma ray backgrounds, were used in conjunction with a cylindrical liquid hydrogen target, of very low boil-off rate. The cross sections at laboratory angles of 39.2, 66.7, 111.6, and 134 deg are 7.49 plus or minus 0.47, 8.10 plus or minus tively, where the assigned errors refer only to the relative values. The absolute cross sections are in substantial agreement with the dispersion theory and confirm the front to back asymmetry. (auth)
- Research Organization:
- Univ. of Glasgow
- NSA Number:
- NSA-17-016985
- OSTI ID:
- 4751187
- Journal Information:
- Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Journal Name: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B Vol. Vol: (10), 27; ISSN NUCIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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