Compton scattering of 320-keV. gamma. rays by K -shell electrons of holmium and gold

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.1267· OSTI ID:6485052

Lad, S M; Basavaraju, G; Kane, P P ^[1]

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1. Department of Physics, Indian Institute of Technology, Powai, Bombay (India)

Compton scattering of 320-keV {gamma} rays through 45{degree} and 115{degree} by {ital K}-shell electrons of gold and holmium has been studied by the well-known coincidence technique. Double-differential cross sections with respect to outgoing photon energy and angle have been determined from 30 keV up to the kinematic limits. Target-{ital Z}-dependent false coincidences arising from bremsstrahlung emitted by photoelectrons were estimated both by theoretical analysis and by measurements carried out with gold targets of thicknesses differing by more than a factor of 4. The analysis of the bremsstrahlung process included the often neglected effects of the angular distribution of photoelectrons and of multiple scattering of electrons during the slowing-down process within the target. The bremsstrahlung generated false coincidences obscure the possible observation of the predicted infrared divergence in the low outgoing photon energy regime and lead to a significant contribution even in the quasi-Compton regime. The single-differential cross sections obtained after a correction for bremsstrahlung are in reasonable agreement with theoretical calculations.

• OSTI ID: 6485052
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 42:3; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BASIC INTERACTIONS
COINCIDENCE METHODS
COLLISIONS
COMPTON EFFECT
COUNTING TECHNIQUES
DISTRIBUTION
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
GAMMA RADIATION
GOLD
HOLMIUM
INTERACTIONS
IONIZING RADIATIONS
K SHELL
KEV RANGE
KEV RANGE 100-1000
METALS
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
RADIATIONS
RARE EARTHS
SCATTERING
TRANSITION ELEMENTS