Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
This work aims to investigate the feasibility of application of gamma scattering technique for inspecting density variation in some construction objects by Monte-Carlo simulation method. The gamma-ray sources of different energies and strengths have been used to extract the information of density variation for interior of sample by recording the backscattering gamma-rays with a gamma-ray detector. The results of our simulations confirm that the resolution for density variation in the inspected objects is quite good. The results should also prove useful in the optimum design of the nondestructive density gauges. | Communications in Physics, Vol. 22, No. 3 (2012), pp. 275-281 A FEASIBILITY STUDY IN APPLICATION OF A GAMMA SCATTERING TECHNIQUE FOR INSPECTING DENSITY VARIATION BY MONTE CARLO METHOD LE HONG KHIEM, TRAN DINH TRONG Center for Nuclear Physics, Institute Of Physics, VAST NGUYEN VAN THAO Center of Technology Development Assistance and Service, VAST Abstract. Back-scattering gamma-rays have been extensively used for years as a nondestructive tool for inspecting the materials in different fields of the economy. The intensities of Compton scattering gamma-rays from the scattering medium strongly depend on its electron density and therefore in its mass density. This feature is very useful for using these rays as a viable tool for inspecting material. This work aims to investigate the feasibility of application of gamma scattering technique for inspecting density variation in some construction objects by Monte-Carlo simulation method. The gamma-ray sources of different energies and strengths have been used to extract the information of density variation for interior of sample by recording the backscattering gamma-rays with a gamma-ray detector. The results of our simulations confirm that the resolution for density variation in the inspected objects is quite good. The results should also prove useful in the optimum design of the nondestructive density gauges. I. INTRODUCTION Back-scattering gamma rays have been extensively used for years as a nondestructive tool for inspecting the materials in industrial non-destructive testing instruments and techniques [1–3]. The intensities of Compton scattering gamma-rays from the scattering medium strongly depend on its electron density and therefore on its mass density. This feature is very useful for using back-scattering gamma-rays as a viable tool for inspecting material, especially for ascertaining quantitative information of density of an inspecting object. For example, in highway construction, two aspects are very important .
