Photon mass attenuation coefficients, effective atomic numbers and electron densities of some thermoluminescent dosimetric compounds

Gowda, Shivalinge; Krishnaveni, S.; Yashoda, T.; Umesh, T. K.; Gowda, Ramakrishna

doi:10.1007/bf02704481

“…Using the total mass attenuation coefficients of a material, the total atomic cross-section, σa, can be evaluated by the following relation (Manohara et al, 2008a(Manohara et al, , 2008bAkkurt, 2009;Elmahroug et al, 2015;Akkurt and El-Khayatt, 2013b;Gowda et al, 2004Gowda et al, , 2005Içelli et. al., 2011;Prasad et al, 1998) …”

Section: Theoretical Formulationsmentioning

confidence: 99%

“…The effective atomic number Zeff can be obtained from the ratio between the total atomic effective cross-section and the total electronic effective cross-section as the following equation (Manohara et al, 2008a(Manohara et al, , 2008bAkkurt, 2009;Elmahroug et al, 2015;Akkurt and El-Khayatt, 2013b;Gowda et al, 2004Gowda et al, , 2005Içelli et al, 2011;Kaur et al, 2000) ( 5) The effective electron number (Neff) (the electrons number per unit mass, electron/g) can be calculated from the following equation (Manohara et al, 2008a(Manohara et al, , 2008bAkkurt, 2009;Elmahroug et al, 2015;Akkurt and El-Khayatt, 2013b;Gowda et al, 2004Gowda et al, , 2005Içelli et al, 2011) ( )…”

Section: Theoretical Formulationsmentioning

confidence: 99%

Partial and total mass attenuation coefficients, effective atomic number and effective electron number of different Maraging steel compositions

Reda¹,

Halfa²

2017

View full text Add to dashboard Cite

The total and partial mass attenuation coefficients for different Maraging steel compositions have been determined by using the WinXCom and MCNP5 programs. The effective atomic number, Z eff , and effective electron number, N eff , for the studied steels have been determined via the total mass attenuation coefficients μ/ρ, the total atomic and electronic cross sections (σ a and σ e ) of the investigated steels. The shielding parameters μ/ρ, Z eff , and N eff have been calculated at the incident photon energy range of 1 keV-100 MeV. The calculated results of total and partial mass attenuation coefficients, the effective atomic number and the effective electron number by using MCNP5 program were found to be in good agreement with the theoretical results of the WinXCom program. The calculated data clarify that the different steel compositions under investigation have so far the same ability of gamma attenuation. Also, it was found that the total mass attenuation coefficients of the different investigated steels (cobalt free-Maraging steels) are comparable to the C250 standard steel (cobalt Maraging steel).

show abstract

“…It may due to reason that photo-electric crosssection varies inversely with incident photon energy as E 3.5 . In the lower energy region values of μ(photo) of all the gem stones are almost same but as the incident photon energy increases there is considerable increase in difference of values of μ(photo) of all the gem stones as μ(photo) is further strongly dependent on atomic number of interacting materials as z [4][5] .…”

Section: Mass Attenuation Coefficient Of Selected Materials As a Funcmentioning

confidence: 99%

Gamma-Rays Absorption Studies of Garnet series of Gemstones at 1 Kev to 100 GeV: Theoretical Calculation

Sandeep¹

2014

IOSRJEN

View full text Add to dashboard Cite

-Mass attenuation coefficients and partial photon interactions have been calculated theoretically at incident photon energy 1 Kev to 100 GeV for garnet series of gemstones (Grosaularite (GS1), Pyrope(GS2), Spessarlite(GS3), Almandine(GS4), Uvarovite(GS5) and Androdite(GS6) using XCOM software [1]. The values of these parameters have been found to change significantly with incident photon energy and composition of the garnet series of gemstones. Half value layer (HVL) and tenth value layer (TVL) has also been calculated; whose lower value reveals the good shielding ability for gamma rays. Hence it is concluded that GS4 shows the maximum shielding effectiveness and also GS6 and GS3 seem to have good radiation shielding. It is also analyzed that our calculated mass attenuation coefficient of NBS concrete by the present method are in excellent agreement with standard values given by ANSI/ANS-6.4.3 data.

show abstract

“…It may due to reason that photo-electric crosssection varies inversely with incident photon energy as E 3.5 . In the lower energy region values of μ(photo) of all the gem stones are almost same but as the incident photon energy increases there is considerable increase in difference of values of μ(photo) of all the gem stones as μ(photo) is further strongly dependent on atomic number of interacting materials as z [4][5] . In figs.…”

Section: Mass Attenuation Coefficient Of Selected Materials As a Funcmentioning

confidence: 99%

Untitled

2014

IOSRJEN

0

View full text Add to dashboard Cite

-Mass attenuation coefficients and partial photon interactions have been calculated theoretically at incident photon energy 1 Kev to 100 GeV for garnet series of gemstones (Grosaularite (GS1), Pyrope(GS2), Spessarlite(GS3), Almandine(GS4), Uvarovite(GS5) and Androdite(GS6) using XCOM software [1]. The values of these parameters have been found to change significantly with incident photon energy and composition of the garnet series of gemstones. Half value layer (HVL) and tenth value layer (TVL) has also been calculated; whose lower value reveals the good shielding ability for gamma rays. Hence it is concluded that GS4 shows the maximum shielding effectiveness and also GS6 and GS3 seem to have good radiation shielding. It is also analyzed that our calculated mass attenuation coefficient of NBS concrete by the present method are in excellent agreement with standard values given by ANSI/ANS-6.4.3 data.

show abstract

Photon mass attenuation coefficients, effective atomic numbers and electron densities of some thermoluminescent dosimetric compounds

Cited by 114 publications

References 15 publications

Partial and total mass attenuation coefficients, effective atomic number and effective electron number of different Maraging steel compositions

Partial and total mass attenuation coefficients, effective atomic number and effective electron number of different Maraging steel compositions

Gamma-Rays Absorption Studies of Garnet series of Gemstones at 1 Kev to 100 GeV: Theoretical Calculation

Untitled

Contact Info

Product

Resources

About