ANALYSIS OF HALF VALUE LAYER (HVL), TENTH VALUE LAYER (TVL) AND MEAN FREE PATH (MFP) OF SOME OXIDES IN THE ENERGY RANGE OF 122KeV to 1330KeV

Abstract

In the present work half value layer (HVL), tenth value layer (TVL)and mean free path (Mfp) are the most frequently used important parameter for explaining both the penetrating ability of particular radiations and the penetration through specific objects or material. The half value layers (HVL), tenth value layers (TVL) gives 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. In the present investigation we calculated the values of linear attenuation coefficient, mean free path (MfP), half value layer (HVL) and tenth value layer (TVL) for some oxides such as aluminum oxide, manganese oxide, copper oxide and magnesium oxide in the energy range from 122keV to 1330keV were measured. The transmitted intensity of photons emitted by radioactive isotopes of 133Ba, 22Na, 137Cs, 54Mn and 60Co measured using the NaI(Tl) scintillation detector and results obtained are in good agreement with the values reported in the present study.

Nuclear Radiation Shielding Capabilities of Fiber-Reinforced Concrete: a case study Hybrid-Polypropylene-Steel

“…A parallel beam of the measured intensity I of the transmitted mono-energetic X-ray or gamma-ray photons attenuated in the matter is related to the incident intensity 𝐼𝐼 0 is usually referred to as Beer-Lambert law is given by the relation [25]:…”

“…The HVL and TVL are the thickness of an absorber sample that will reduce the initial radiation intensity to one-half and one-tenth, respectively. These can be calculated by [25], [28] : HVL = Ln2 / 𝜇𝜇 (4) , and TVL = Ln10 / 𝜇𝜇 (5) Mean free path is the average distance at which a single particle travels through the medium of given sample before interacting it with material and is calculated by the following equation [6], [18]: MPF = 1/ 𝜇𝜇 (6)…”

X‐Ray Shielding Performance and Characterization of Electrospun PVC/Bismuth(III) Oxide Nanocomposites

“…In order to characterize X‐ray attenuation behaviors of samples, the measurements were performed at 120 kVp tube voltage by keeping the distance between X‐ray source and sample at 30 cm [37] . Linear attenuation coefficients (μ), half value length (HVL), tenth value length (TVL), mean free path (MFP) and radiation absorption ratio (RAR) were calculated by following formula: [38,39] …”

Determination of Half and Tenth Value Layer Primary and Secondary Walls of X-Ray Room in Bali Jimbaran General Hospital

“…with I0 initial intensity (W/m 2 ), I intensity after passing through the material (W/m 2 ), x is the thickness of the material (m), µ is linear attenuation coefficient (m -1 ). The HVL and TVL values of a material can be derived from equation (1), where 𝐼 = ½ 𝐼 0 for HVL and 𝐼 = 1 10 𝐼 0 for TVL, the HVL and TVL are formulated in Equations ( 2) and (3) [10][11][12] 𝐻𝑉𝐿 = ln 2 𝜇…”