Sidhu Gurdeep S, Singh Tejbir, Mudahar Gurmel S, Singh Parjit S
Physics Department, Punjabi University, Patiala 147002, India.
Radiat Prot Dosimetry. 2006;121(3):317-20. doi: 10.1093/rpd/ncl044. Epub 2006 Apr 13.
Transmitted photon spectra (pulse-height distribution) of (137)Cs gamma rays are measured through longitudinal and transverse dimensions of the soil medium. The intensity (photon fluence rate) of the multiple-scattered peak, appearing in the lower energy part of the spectrum, has been studied as a function of longitudinal as well as transverse thickness of the soil medium. The intensity of multiple-scatter peak decreases exponentially with the increase in longitudinal thickness of the soil medium, whereas a reverse trend of multiple-scatter peak intensity with transverse thickness occurs as the longitudinal dimension increases. The soil medium as a whole takes part in multiple scattering affecting the intensities of transmitted photons.
