PAIR PRODUCTION IN HYDROGEN AND THE PANOFSKY RATIO

Journal Article · Sun Feb 16 04:00:00 EST 1964 · Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B

DOI:https://doi.org/10.1007/BF02733792· OSTI ID:4074908

Warshaw, S D; Wright, S C

Observations are reported of 1600 pair- and tripletproduction events in which the conversion occurs in the hydrogen filling of a 10-inch bubble chamber. The gamma rays responsible for the events are all identified as originating from charge-exchange and radiative-capture reactions of pi -mesons stopping in the same bubble chamber. The number of pi /sup -/ stops, the number of pairs and triplets separated as to source, along with a Monte Carlo calculation of geometrical factors, allows a determination of the Panofsky ratio and the constant A/sub trip/ in the assumed form of the triplet cross section sigma /sub trip/ = (28/9) In (2E/sub gamma //m/sub e/) A/sub trip/. The results are P = 1.590 plus or minus 0.089 for the Panofsky ratio and A/sub trip/ = (109 plus or minus 5.4)/9. The best theoretical estimate for A/sub trip/ is 105/9 with an uncertainty of about 5/9. (auth)

• Research Organization: Argonne National Lab., Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-014856
• OSTI ID: 4074908
• 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), 31; ISSN NUCIA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
BUBBLE CHAMBERS
CAPTURE
CONFIGURATION
ELECTRIC CHARGES
GAMMA RADIATION
HYDROGEN
MESONS
NUMERICALS
PAIR PRODUCTION
PANOFSKY RATIO
PHYSICS
PIONS