HIGH-FREQUENCY LIMIT OF 15.1-Mev BREMSSTRAHLUNG

Journal Article · Fri Mar 01 04:00:00 EST 1963 · Physical Review (U.S.) Superseded in part by Phys.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.129.2207· OSTI ID:4737541

Hall, H E; Hanson, A O; Jamnik, D

The 15.1-Mev scattering resonance in carbon is used to study the yield of photons at the high-frequency limit of the bremsstrahlung spectrum. A survey of the yield at 0 deg was carried out for several elements. The 0 deg yield at the limit increases strongly with the atomic number in agreement with recent calculations. Measurements of the 15.1Mev isochromats from a thin thorium (Z = 90) target for several angles are presented and compared with available calculations. A value of 1.61 plus or minus 0.18 mb is obtained for (k/Z/sup 2/ ) (d sigma /dk), the cross section integrated over angle. This is in reasonable agreement with theoretical values of 1.96 mb based on the inverse photoeffect and 1.74 mb as obtained from a direct evaluation of the bremsstrahlung matrix element in the extreme relativistic limit. (auth)

• Research Organization: Univ. of Illinois, Urbana
• NSA Number: NSA-17-013429
• OSTI ID: 4737541
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 129; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BREMSSTRAHLUNG
CARBON
CROSS SECTIONS
ELECTRIC CHARGES
ELEMENTS
ENERGY
FREQUENCY
MATRICES
MEASURED VALUES
PHOTONS
PHYSICS
RESONANCE
SCATTERING
SPECTRA
TARGETS
THORIUM