MEASUREMENT OF DIFFERENTIAL COMPTON-SCATTERING CROSS-SECTION OF 661.6KEV GAMMA-RAYS FROM COMPOUNDS CONTAINING HYDROGEN, CARBON AND OXYGEN

Compton scattering cross sections of 661.6 keV gamma rays of Cs-137 fr om Al and 12 compounds containing hydrogen and carbon or hydrogen, car bon and oxygen have been measured at three different scattering angles of 60 degrees, 90 degrees and 115 degrees. Differential Compton scatt ering cross section values for Al have been obtained theoretically by means of incoherent scattering function calculation. Comparing the exp erimental data with the theoretical cross section values for Al, an ex perimental arrangement has been calibrated for each scattering angle. So, differential Compton scattering cross sections for the 12 compound s at three scattering angles have been obtained. The corresponding the oretical differential cross sections were calculated by means of incoh erent scattering functions. A comparison between the experimentally de termined results and the theoretically calculated values shows good ag reement. Also, a linear relation has been obtained between the differe ntial Compton scattering cross sections and the hydrogen weight fracti on for H-C compounds but not for H-C-O compounds. The absolute electro n densities of these compounds have been estimated.