Calculation of Gamma-Ray Buildup Factors up to Depths of 100 mfp by the Method of Invariant Embedding. (I). Analysis of Accuracy and Comparison with Other Data.

Gamma-ray exposure build-up factors of some brick materials in the state of Punjab

“…The build-up factors in the ANS-6.4.3 are for 23 elements of the atomic numbers Z = 4 to 92. The build-up factors of ANS-6.4.3 can also be calculated by invariant embedding (Shimizu, 2002;Shimizu et al, 2004). Harima et al (1986) developed a fitting formula, called Geometrical Progression (GP), which gave build-up factors in good agreement with the ANS-6.4.3.…”

A comprehensive study on energy absorption and exposure buildup factors for some essential amino acids, fatty acids and carbohydrates in the energy range 0.015–15MeV up to 40 mean free path

“…There are two types of buildup factor: (a) the energy absorption buildup factor that is the buildup factor in which the quantity of interest is the absorbed or deposited energy in the interacting material and the detector response function is that of absorption in the interacting material, (b) the exposure buildup factor is the buildup factor in which the quantity of interest is the exposure and the detector response function is that of absorption in the air [5]. There are different available methods to calculate the buildup factor such as G-P fitting method [6] and invariant embedding method [7][8][9]. Recently, American National Standards ANSI/ANS-6.4.3 [10] has provided buildup factor data for 23 elements, one compound and two mixtures (i.e.…”

Gamma Ray Photon Energy Absorption Buildup Factor Study In Some Soils

“…fitting parameters corresponding to atomic number Z 1 and Z 2 respectively at a given energy and Z eq is the equivalent atomic number of chosen soils at same energy. Z 1 , Z 2 are the successive elemental atomic numbers such that Z 1 < Z eq < Z 2 …”