Development of a technique using MCNPX code for determination of nitrogen content of explosive materials using prompt gamma neutron activation analysis method

Nasrabadi, M.N.; Bakhshi, F.; Jalali, M.; Mohammadi, Ali

doi:10.1016/j.nima.2011.08.029

Cited by 15 publications

(3 citation statements)

References 13 publications

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“…For example, MC simulations are capable of estimating the neutron flux passing through materials and their energy loss in these materials, determining the energy distribution of emerging neutrons [65], calculating the optimal thickness of shielding [66,67] and moderator [68], and reproducing the characteristic neutron-induced gamma-ray spectra of different materials [69][70][71][72][73].…”

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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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%

Neutron-Stimulated Gamma Ray Analysis of Soil

Kavetskiy¹,

Yakubova²,

Torbert³

2017

New Insights on Gamma Rays

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“…In prompt gamma neutron activation analysis (PGNAA) method, mixed neutrongamma elds are generated by radiation sources. The method is based upon bombarding a sample with neutrons and measuring the prompt gamma spectrum emitted from the elements within the sample after absorbing the neutrons [1]. The energies of the gamma rays are characteristic of the element's isotopes, and their intensities are proportional to their concentration [2,3].…”

Section: Introductionmentioning

confidence: 99%

Environmental Gamma Dose Evaluation During Explosive Materials Analysis by PGNAA Technique Using MCNPX Code

Nasrabadi

Omidi

2015

Acta Phys. Pol. A

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Increased use of radiation in medicine, industry, and laboratories, requires safe conditions to be provided for its optimal use. One of the cases in which people are exposed to radiation, is during the detection of explosive materials by PGNAA method. Therefore, external dosimetry is necessary for workplaces where the method is used. In this study, Monte Carlo simulation program, MCNPX has been used to simulate gamma dose in the environment during the detection of explosive materials by PGNAA method. The simulated results were validated practically. The results indicate a good agreement between the simulated and measured data. The study demonstrated that MCNPX code can be used eectively for simulating gamma dose in various environments.

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“…The objectives of this type of inspection are to look for explosives in objects as small as a briefcase and as large as a truck and marine shipping container (Tsahi and Dan, 2007). The technique is based upon bombarding a sample with neutrons and measurement of the prompt gamma-ray spectrum emitted from the elements in the sample via fast neutrons inelastic scattering and/or thermal neutron capture (Nasrabadi et al, 2011;Runkle et al, 2009). There are extensive existing literatures on the designs of neutron-induced gamma-ray detector systems for material composition analysis, including many papers on the detection of explosives.…”

Section: Introductionmentioning

confidence: 99%

Design of an explosive detection system to investigate the luggage of aircraft passenger based on neutron-gamma technique

Reda¹

2015

Int. J. Phys. Sci.

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In this study an explosive detection system to investigate luggage of air travelers by the Monte Carlo N-Particle Transport code (MCNP5) has been designed. Concrete as a commonly shielding material was the main part in the designed system. Pulsed neutron generator with 14.1 MeV neutrons was used as a neutron source. Two time gates were used in gamma detection process. The lead was used as a secondary gamma rays shielding material for the sake of background reduction. The equivalent dose outside the designed system was less than the accepted level. Gamma signals from different weights of explosives 1.833, 1.173, 0.815 and 0.399 kg at different detector positions were calculated. The results show that the designed system can be provide a reasonable values of signal-to-background ratio from the explosive basic elements constitute, C, O and N.

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Development of a technique using MCNPX code for determination of nitrogen content of explosive materials using prompt gamma neutron activation analysis method

Cited by 15 publications

References 13 publications

Neutron-Stimulated Gamma Ray Analysis of Soil

Neutron-Stimulated Gamma Ray Analysis of Soil

Environmental Gamma Dose Evaluation During Explosive Materials Analysis by PGNAA Technique Using MCNPX Code

Design of an explosive detection system to investigate the luggage of aircraft passenger based on neutron-gamma technique

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