NEUTRAL PIONS FROM PROTON-PROTON COLLISIONS AT 735 Mev (thesis)

Technical Report · Tue May 01 04:00:00 EDT 1962

OSTI ID:4783879

Mead, G D

An investigation was made of the reaction p + p yields p + p + pi / sup 0/ at an incident proton energy of 735 Mev, The external proton beam of the 184-in, synchrocyclotron bombarded a liquid hydrogen target, Gamma spectra were measured at lab angles of 6, 32, and 60 deg with respect to the proton beam. Two high-resolution pair spectrometers were used to analyze the photons. Computer codes were used to make all necessary corrections to the data and determine the final spectra. No evidence was found for gamma rays produced from any source other than pi /sup 0/ decay. The cross section for pi /sup 0/ production was measured to be 3.46 plus or minus 0.25 mb. Using a least-squares analysis, angular and momentum distributions for the neutral pion in the two-proton c.m. system were determined from the photon spectra. The pion angular distribution is given by d sigma pi /sup 0//d OMEGA = sigma /sub tot//4 pi STA0.834 + 0.099 (3 cos/sup 2/ theta ) + 0.067 (5 cos/sup 4/ theta )!, That is, 83% of the pions are produced with isotropic distribution. This result is consistent with the isobar model of pion production. Pion momentum distributions are given for several c.m. angles. These also support the isobar model. (auth)

• Research Organization: California. Univ., Berkeley. Lawrence Radiation Lab.
• NSA Number: NSA-17-002169
• OSTI ID: 4783879
• Report Number(s): UCRL-10187
• Country of Publication: United States
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
COLLISIONS
COMPUTERS
CROSS SECTIONS
CYCLOTRONS
DECAY
ENERGY RANGE
GAMMA RADIATION
HYDROGEN
ISOBARIC MODEL
LEAST SQUARES
LIQUIDS
MATHEMATICS
MEASURED VALUES
MEV RANGE
MOMENTUM
NUMERICALS
PARTICLE MODELS
PHOTONS
PHYSICS
PIONS
PRODUCTION
PROTONS
RESOLUTION
SPECTRA
SPECTROMETERS
SYNCHROTRONS
TARGETS