Tables of x-ray mass attenuation coefficients and mass energy-absorption
                        coefficients 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional
                        substances of dosimetry interest

Hubbell, J.H.; Seltzer, S. M.

doi:10.6028/nist.ir.5632

Cited by 1,938 publications

(1,863 citation statements)

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“…In order to track secondary electrons down to 100 eV, and obtain shorter simulation execution times compared to the Geant4-DNA Low Energy Extensions, the Low Energy Electromagnetic Physics models based on PENELOPE [32][33][34] were adopted to describe particle interactions. Stewart et al [33] showed that PENELOPE physics models can estimate physical quantities on the micron-scale between 1 and 25% 50 µm agreement with track structure Monte Carlo codes when calculating the mean specific energy.…”

Section: Methodology: the Geant4 Simulation Studymentioning

confidence: 99%

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Optimizing dose enhancement with Ta 2 O 5 nanoparticles for synchrotron microbeam activated radiation therapy

et al. 2016

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Microbeam Radiation Therapy (MRT) exploits tumour selectivity and normal tissue sparing with spatially fractionated kilovoltage X-ray microbeams through the dose volume effect. Experimental measurements with Ta 2 O 5 nanoparticles (NPs) in 9L gliosarcoma treated with MRT at the Australian Synchrotron, increased the treatment efficiency. Ta 2 O 5 NPs were observed to form shells around cell nuclei which may be the reason for their efficiency in MRT. In this article, our experimental observation of NP shell formation is the basis of a Geant4 radiation transport study to characterise dose enhancement by Ta 2 O 5 NPs in MRT. Our study showed that NP shells enhance the physical dose depending microbeam energy and their location relative to a single microbeam. For monochromatic microbeam energies below ∼70 keV, NP shells show highly localised dose enhancement due to the short range of associated secondary electrons. Low microbeam energies indicate better targeted treatment by allowing higher microbeam doses to be administered to tumours and better exploit the spatial fractionation related selectivity observed with MRT. For microbeam energies above ∼100 keV, NP shells extend the physical dose enhancement due to longer-range secondary electrons. Again, with NPs selectively internalised, the local effectiveness of MRT is expected to increase in the tumour. Dose enhancement produced by the shell aggregate varied more significantly in the cell population, depending on its location, when compared to a homogeneous NP distribution. These combined simulation and experimental data provide first evidence for optimising MRT through the incorporation of newly observed Ta 2 O 5 NP distributions within 9L cancer cells. Disciplines Engineering | Science and Technology Studies Publication DetailsEngels, E., Corde, S., McKinnon, S., Incerti, S., Konstantinov, K., Rozenfeld, A., Tehei, M., . Optimizing dose enhancement with Ta2O5 nanoparticles for synchrotron microbeam activated radiation therapy. Physica Medica: an international journal devoted to the applications of physics to medicine and biology, 32 (12)

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Section: Methodology: the Geant4 Simulation Studymentioning

confidence: 99%

“…The 67.4 keV K-edge [34] in Ta short-range, high LET photoelectrons. However, there is no increase of dose in the valley due to the limited range of the electrons.…”

Section: ) Statistical Uncertainty Is Present Though Smaller Than mentioning

confidence: 99%

Optimizing dose enhancement with Ta 2 O 5 nanoparticles for synchrotron microbeam activated radiation therapy

et al. 2016

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“…Table 7.1: X-ray mass attenuation coefficients for carbon, nitrogen, and oxygen at 400 keV from Ref. [31]. The small differences in attenuation due to the presence of nitrogen and oxygen in seaweed are negligible when calculating self absorption of 131 I gamma rays in seaweed samples approximated as 100% carbon.…”

Section: Determination Of 131 I Detection Efficiencymentioning

confidence: 99%

Monitoring rainwater and seaweed reveals the presence of 131I in southwest and central British Columbia, Canada following the Fukushima nuclear accident in Japan

Chester

Starosta

Andreoiu

et al. 2013

Journal of Environmental Radioactivity

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Detailed analysis of 131 I levels in rainwater and in three species of seaweed (Fucus distichus Linnaeus, Macrocystis pyrifera, and Pyropia fallax) collected in southwest British Columbia and Bella Bella, B.C., Canada was performed using gamma-ray spectroscopy following the Germanium Detector for Elemental Analysis and Radioactivity Studies (GEARS) was modeled using the Geant4 software package and developed as an analytical tool by the Nuclear Science group in the Simon Fraser University Department of Chemistry for the purpose of these measurements.

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“…For subsequent calculations, for which more data points with more precision were desired, 5 cm increments of thickness were instead used. In accordance with data provided [7], the concrete (ordinary or barite concrete) was specified as having the atomic composition given in Table I and a density. The source was a monoenergetic beam of photons of energy E, emitted perpendicularly from a disk 50 cm in radius, oriented axially in-line with the long axis of the cylindrical shield (as in Fig.…”

Section: Geometry and Materialsmentioning

confidence: 99%

“…Firstly, the attenuation of 0.511 MeV and 0.662 MeV photons by concrete is considered, and results compared with the standard measured data provided in the literature [5][6][7]. Good agreement is taken to indicate that the chosen Monte Carlo method may be employed to make additional calculations on the attenuation of sources with different energies, a capability particularly useful in cases where no analogous experimental data exist.…”

Section: Introductionmentioning

confidence: 99%

Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials

et al. 2010

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Nuclear facilities as nuclear power stations, nuclear research reactors, particle accelerators and linear accelerator in medical institution using concrete in building construction. The different type materials of the aggregate as component of concrete were analyzed to provide radiation protection. The energy deposited the transmission factor and the mass attenuation coefficients in ordinary and barite concretes have been calculated with the photon transport Monte Carlo software. The numerical simulations results show that using barite as an aggregate in the concrete is one of the solutions for gamma ray shielding. Thereat, it is shown non-destructive method for determining the gamma radiation absorption characteristics of concrete.

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Tables of x-ray mass attenuation coefficients and mass energy-absorption coefficients 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional substances of dosimetry interest

Cited by 1,938 publications

References 1 publication

Optimizing dose enhancement with Ta 2 O 5 nanoparticles for synchrotron microbeam activated radiation therapy

Optimizing dose enhancement with Ta 2 O 5 nanoparticles for synchrotron microbeam activated radiation therapy

Monitoring rainwater and seaweed reveals the presence of 131I in southwest and central British Columbia, Canada following the Fukushima nuclear accident in Japan

Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials

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