THE THEORY OF THE PASSAGE OF $gamma$-QUANTA THROUGH MATTER (in Russian)
Journal Article
·
· At. Energ. (USSR)
OSTI ID:4663701
As a result of multiple scattering, the attenuation of gamma radiation as a function of the depth of penetration in an absorber cannot be described by a simple exponential expression. The attenuation depends on the energy of the source and the geometry of the system. One of the strictest calculation methods (L Spencer et al. J. Res. Nat. Bur. Stand. 48: 448 (1951); H. Goldstein et al. NYO-3075 (1954)) involves the integral-differential kinetic equations of the proton density function with 3 variables; however, the method can be used only for an infinite medium. Therefore the simplest limiting problem in the passage of gamma quanta through the matter is considered, assuming that a monochromatic gamma beam falls normally on a plane-parallel sheet of a finite thickness a in the direction of the x axis, being infinitely thick in the y and z directions. The photon current density leaving the surface (x = a) and the inverse current in the opposite direction (x = O) are taken into consideration. The integral- differential equation of the problem calculated under boundary conditions for the current density of scattered gamma quanta in the n-th approximation leads to Legendre-type 2n system of first-order differentialintegral equations for the divergence coefficients of the flux density of the scattered gamma quanta. Arbitrary constants were determined for 2n boundary conditions; definitive results were obtained only for n = 1, giving the spectral distribution of the flux density of the scattered gamma -quanta at a given distance from the source. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-034890
- OSTI ID:
- 4663701
- Journal Information:
- At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 14
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
Similar Records
Radiation field of a point monodirectional γ-ray source
AN ENERGY SPECTRUM METHOD FOR THE CALCULATION OF BUILDUP FACTORS FOR 6 MEV GAMMA RADIATION
THE $gamma$-RADIATION FIELD OF A WELL-COLLIMATED BEAM FROM A POINT SOURCE OF Cs$sup 137$ OR Co$sup 60$ IN IRON
Journal Article
·
Wed Aug 01 00:00:00 EDT 1962
· Atomic Energy (New York)
·
OSTI ID:4796190
AN ENERGY SPECTRUM METHOD FOR THE CALCULATION OF BUILDUP FACTORS FOR 6 MEV GAMMA RADIATION
Technical Report
·
Fri Jun 27 00:00:00 EDT 1958
·
OSTI ID:4294285
THE $gamma$-RADIATION FIELD OF A WELL-COLLIMATED BEAM FROM A POINT SOURCE OF Cs$sup 137$ OR Co$sup 60$ IN IRON
Journal Article
·
Sat Jun 01 00:00:00 EDT 1963
· At. Energ. (USSR)
·
OSTI ID:4688979