Basic considerations for Monte Carlo calculations in soil

Wielopolski, Lucian; Song, Zhiguang; Orion, Itzhak; Hanson, A.L.; Hendrey, George R.

doi:10.1016/j.apradiso.2004.06.003

Cited by 39 publications

(20 citation statements)

References 8 publications

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“…The system could have neutron sources (isotropic source with energies that match the experimental setup), detector, and shielding (if required). The MC simulation soil model can be viewed as a three-phase system (solid, liquid, and gaseous phases) [74]. Based on calculation objectives, the soil model may be simplified if all soil parameters critical to the MC simulation are met.…”

Section: Monte-carlo Simulation Methodsmentioning

confidence: 99%

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Neutron-Stimulated Gamma Ray Analysis of Soil

Kavetskiy¹,

Yakubova²,

Torbert³

2017

New Insights on Gamma Rays

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This chapter describes technical aspects of neutron-stimulated gamma ray analysis of soil carbon. The introduction covers general principles, different modifications of neutron-gamma analysis, measurement system configuration, and advantages of this method for soil carbon analysis. Problems with neutron-gamma technology in soil carbon analysis and methods of investigations including Monte-Carlo simulation of neutron interaction with soil elements are discussed further. Based on the investigation results, a method of extracting the "soil carbon net peak" from the raw acquired data was developed. The direct proportional dependency between the carbon net peak area and average carbon weight percent in the upper 10 cm soil layer for any carbon depth profile was shown. Calibration of the measurement system using sand-carbon pits and field measurements of soil carbon are described. Measurement results compared to chemical analysis (dry combustion) data demonstrated good agreement between the two methods. Thus, neutron-stimulated gamma ray analysis can be used for in situ determination of near-surface soil carbon content and is applicable for precision geospatial mapping of soil carbon.

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Section: Monte-carlo Simulation Methodsmentioning

confidence: 99%

“…Based on calculation objectives, the soil model may be simplified if all soil parameters critical to the MC simulation are met. Our research used the approach of other researchers [74,75] where the soil model was constructed as a compact medium with known elemental composition and density depth profiles.…”

Section: Monte-carlo Simulation Methodsmentioning

confidence: 99%

Neutron-Stimulated Gamma Ray Analysis of Soil

Kavetskiy¹,

Yakubova²,

Torbert³

2017

New Insights on Gamma Rays

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“…For the soils S1-S6 bulk density, moisture content, porosity and field capacity have been determined in previous works [2,3,6]. The bulk density and porosity of the soils S7, a carbon rich loam soil S8 and S9 have been determined [22]. Moisture, bulk density, porosity and field capacity of the soil samples from five different agricultural zones in Egypt with different fractions of sand, coarse silt, fine silt, coarse clay and fine clay have been also determined by Medhat [24].…”

Section: Introductionmentioning

confidence: 99%

“…The calculated values of Martian and Earth soils have been compared. The chemical compositions of Earth soils are taken from the works of Baytas and Akbal [3] (labeled S1-Ankara, S3-Konya, S4-Fatsa, S5-Bergama, S6-Batman), Demir et al [2] (labeled S2-Erzurum), Wielopolski et al [22] (labeled S7, S9-the median value of world soils), Miller and Turk [23] (labeled S8) and Medhat [24] (labeled S10-14). In the soils, bulk density, moisture content, porosity and field capacity are very important parameters.…”

Section: Introductionmentioning

confidence: 99%

Determination of mass attenuation coefficients, effective atomic numbers, effective electron numbers and kermas for Earth and Martian soils

Şahin

2012

Nuclear Instruments and Methods in Physics Research Section B:

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“…Their elemental compositions are described in Refs. [24][25][26][27], respectively. By using data from [22,23], the corresponding values of Z/A and the two-way mass attenuation coefficients µ = µ f + µ b are calculated, where µ f and µ b are the forward and backward components for photon energies E f = 511 keV and E bc = 170.33 keV.…”

Section: Simulationsmentioning

confidence: 99%

On the Possibility of Determining the Distribution of a Substance Penetrating into a Dense Medium Using Gamma-Ray Detection and Ranging Approach

Gurdev

Dreischuh²,

Stoyanov³

et al. 2010

Acta Phys. Pol. A

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The possibility has been investigated of determining, using graydar (Gamma RAY Detection And Ranging) approach, the in-depth partial-density profile of some substance absorbed in a dense medium. Analytical algorithms have been derived for retrieving the in-depth profile of the partial density of the absorbed substance on the basis of the conjecturally known in-depth profile of the extinction of the absorbing medium and the experimentally determinable graydar profile. The retrieval error under the Poisson noise conditions has also been estimated analytically. The simulations performed of the Poisson-noise effect concern the case of soil moisture. The results obtained confirm the validity of the derived retrieval algorithms and error estimates and show that the soil moisture profile may be accurately determined to depths of 50 cm, depending on the dry-soil bulk density, the sensing photon flux, and the measurement time.

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Basic considerations for Monte Carlo calculations in soil

Cited by 39 publications

References 8 publications

Neutron-Stimulated Gamma Ray Analysis of Soil

Neutron-Stimulated Gamma Ray Analysis of Soil

Determination of mass attenuation coefficients, effective atomic numbers, effective electron numbers and kermas for Earth and Martian soils

On the Possibility of Determining the Distribution of a Substance Penetrating into a Dense Medium Using Gamma-Ray Detection and Ranging Approach

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