Determination of the Tenth and Half Value Layer Thickness of Concretes with Different Densities

Abstract

Half value layer (HVL) is the most frequently used quantitative factor for describing both the penetrating ability of specific radiations and the penetration through specific objects. The half value layers (HVL) and tenth value layers (TVL) are defined as the thickness of a shield or an absorber that reduces the radiation level by a factor of one-half and one tenth of the initial level, respectively. The concepts of HVL and TVL are widely used in shielding design. They are photon energy dependent, like the attenuation coefficient. HVL and TVL values provide useful information about the penetration of a specific radiation in a specific material. In this study, TVL and HVL thickness are calculated for concretes with different densities. For this purpose five types of concrete with different density ranges were selected, with densities between 600-1500 kg/m 3 , called lightweight concrete, 1400-2000 kg/m 3 , called semi lightweight concrete, 2000-2500 kg/m 3 called ordinary concrete, 2500-3000 kg/m 3 , semi heavyweight concrete and 3000-4000 kg/m 3 called heavyweight concrete, respectively. For evaluated TVL and HVL thicknesses, the linear attenuation coefficients µ, were determined from measurements, using a collimated beam of gamma rays from a Cobalt-60 source.

Investigation of Beta Radiation Absorption Properties of Tungstate and Molybdate Doped Wallpapers

“…Equation 1was used in the calculation of linear absorption coefficient and results were obtained according to the properties of the absorber material. The half value layer (HVL) [11,12] is the material thickness required to reduce the intensity of the beam interacting with the material in half. One-tenth (1/10) value layer (TVL) is the material thickness required to reduce the intensity of the beam interacting with the material to 1/10 [12,13].…”

Gamma attenuation through nano lead - nano copper PVC composites

“…The reliability in these experimental measurements could be realized from their good agreements with those determined by utilizing the XCOM program for the same composites loaded with the same percentage of nano oxides. The half-value layer (HVL) is one of the important shielding parameters besides the attenuation coefficient, so the work is extended to calculate the HVL values for the different samples according to the simple equation [29].…”

Sprey Pyrolisis Yöntemiyle SnO2:F Camların Üretimi Optiksel Karakterizasyonun Belirlenmesi ve Kütle Soğurma Katsayısının Hesaplanması

“…Denklem (2) ,(3) ve (4) kullanılarak HVL, TVL ve MFP (λ) değerleri hesaplanmıştır. Ortalama serbest yol (MFP) denklem(4) kullanılarak hesaplanmıştır ( Akkaş, 2016;Agar ve ark., 2019).…”