THE ELASTIC SCATTERING OF 98 Mev NEGATIVE PIONS BY HYDROGEN

Journal Article · Mon Jun 01 04:00:00 EDT 1959 · Proc. Phys. Soc. (London)

DOI:https://doi.org/10.1088/0370-1328/73/6/304· OSTI ID:4267337

Edwards, D N; Frank, S G.F.; Holt, J R

l7206 A new counter method has been develoded for measuring pi /sup +/ meson photoproduction near threshold. It has been employed, in particular, to examine the variation with energy of the differential cross section from hydrogen, at laboratory angles of ll5 and 90 deg to the gamma-ray beam of the Glasgow synchrotron. Polythene and carbon targets were used. Results are compared with theory, and an assessment can be made of the matrix element in the gamma-ray range 165 to 190 Mev. Values of absolute cross section at various energies were also obtained, e.g., for and angle of 90 deg and a gamma-ray energy of 170 Mev, the absolute differential cross section in center-of-mass coordinates is (0.48 plus or minus 0.11) x 10- cm/sup 2/ per steradiand. The measurements also confirm the generally accepted value of the pi /sup +/ meson lifetime. (auth)

• Research Organization: Univ. of Liverpool
• NSA Number: NSA-13-017205
• OSTI ID: 4267337
• Journal Information: Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 73
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BACKGROUND
BEAMS
CHERENKOV COUNTERS
COINCIDENCE METHODS
CROSS SECTIONS
ELASTIC SCATTERING
ELECTRONS
ENERGY RANGE
ERRORS
GAMMA RADIATION
HYDROGEN
IONIZATION CHAMBERS
MEASURED VALUES
MUONS
PHYSICS AND MATHEMATICS
PIONS
PIONS-MINUS
SCATTERING
STANDARDS