SCATTERING OF GAMMA RAYS BY A STATIC ELECTRIC FIELD

Journal Article · Thu May 15 04:00:00 EDT 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.110.805· OSTI ID:4330159

Bernstein, A M; Mann, A K

In an effort to observe Delbruck scattering the absolute differential cross sections for the elastic scattering of 1.33-Mev gamma rays by lead, tin, and uranium and of 2.62-Mev gamma rays by lead and tin have been measured for angles between 15 and 105 degrees. The observed scattering is the coherent sum of Delbruck, Rayleigh, and nuclear Thomson scattering. The amplitude for the latter process is well known; recent calculations of Rayleigh scattering, which are in good agreement with data obtained previously in this laboratory for gamma- ray energies below 1 Mev, provide exact values of the amplitudes at 1.33 Mev and approximate values at 2.62 Mev. At 1.33 Mev, the difference between the observed scattering and that due to the Rayleigh and Thomson processes is not sufficiently large compared with experimental error to permit a definite identification of Delbruck scattering to be made. At 2.62 Mev, for lead, the experimental cross sections at intermediate angles (30 to 75 degrees) are substantially larger than those calculated by extrapolation of the exact calculations, even when reasonable allowance for error in the extrapolation is made. The most probable explanation for this difference is an appreciable contribution from Delbruck scattering. (auth)

• Research Organization: Univ. of Pennsylvania, Philadelphia
• NSA Number: NSA-12-011994
• OSTI ID: 4330159
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 110; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
CROSS SECTIONS
DELBRUECK SCATTERING
ELECTRIC FIELDS
ENERGY RANGE
ERRORS
GAMMA RADIATION
LEAD
PAIR PRODUCTION
PHYSICS
RAYLEIGH SCATTERING
SCATTERING
THOMSON SCATTERING
TIN
URANIUM