Scattering of 1.1732- and 1.3325-MeV gamma rays through small angles by carbon, aluminum, copper, tin, and lead

Abstract

With the help of Ge(Li)

Calculation of the total Rayleigh scattering cross sections of photons in the energy range of 30–50keV for Nb and Mo elements

“…It has been shown by Bradley and Ghose (1986) that the differential Rayleigh scattering cross section values obtained by using the MRFF approximation are considerably smaller than the values obtained by applying the RFF and NFF approximations, and closer to the experimental data. It was mentioned (Bradley and Ghose, 1986;Bradley et al, 1999a;Kane, 2005;Kane et al,1983) that the RFF approximation is seen to be inadequate for an explanation of experimental data while the MRFF approximation is better than RFF approximation and in agreement with experimental data, and the NFF approximation is closer to the experimental data than RFF calculations. It has been a general experience that the order of validity of form-factor approximations is MRFF, followed by NFF, with RFF yielding the poorest predictions.…”

“…For a wide variation in atomic number, the MRFF theory of Rayleigh scattering has been shown to give a good account of the experimental data for xo12Å À 1 ( _ Ic -elli and Erzeneoglu, 2001; Kane, 2005;Kane et al, 1983).…”

Incoherent scattering of 59.5 keV gamma-rays by light, medium and heavy elements

“…The increasing deviation of experimental results from theory for high-Z elements confirms that at low-momentum transfer the binding effects are predominant and, as suggested by earlier investigators [15], exact relativistic calculations are desirable. In order to reduce the statistical error the spectra have been recorded for a long time and about 1014 (and more) counts were collected under the incoherent peak.…”

“…A few investigations [3][4][5][6][7][8][9][10][11][12][13] have been separately carried out by measuring the coincidences between K X-rays and incoherent scattered photons to find the effect of bound electrons. The other investigations [14][15][16][17][18][19][20][21][22][23] have reported on total atomic incoherent-scattering differential cross-sections at large photon energies.…”

Koherent saçılma üzerine moleküler girişimin etkisi

“…The findings suggesting the superiority of the RMFF theory have been reported earlier [16,19,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. It has been established both from comparison of theoretical results and from experiments that the RMFF, in general, produces better results than other choices of the FF [34].…”