In situ determination of salinity by PGNAA

Borşaru, M.; Smith, C.P.; Merritt, Janet S.; Aizawa, Takao; Rojc, A.

doi:10.1016/j.apradiso.2005.12.015

Cited by 18 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One simple example is the use of prompt gamma-ray neutron activation analysis for determining the salinity of water in drill holes. [154] Reports have also been made by the company EADS Sodern (Paris, France) for using down-hole PGNAA analysis for locating and mapping copper in bore-hole logging. Other minerals that have been considered for exploration include coal and precious metals.…”

Section: Geophysical Explorationmentioning

confidence: 99%

Production and applications of neutrons using particle accelerators

Chichester

2009

View full text Add to dashboard Cite

Advances in neutron science have gone hand in hand with the development and of particle accelerators from the beginning of both fields of study. Early accelerator systems were developed simply to produce neutrons, allowing scientists to study their properties and how neutrons interact in matter, but people quickly realized that more tangible uses existed too. Today the diversity of applications for industrial accelerator-based neutron sources is high and so to is the actual number of instruments in daily use is high, and they serve important roles in the fields where they're used. This chapter presents a technical introduction to the different ways particle accelerators are used to produce neutrons, an historical overview of the early development of neutron-producing particle accelerators, a description of some current industrial accelerator systems, narratives of the fields where neutron-producing particle accelerators are used today, and comments on future trends in the industrial uses of neutron producing particle accelerators.

show abstract

Section: Geophysical Explorationmentioning

confidence: 99%

Production and applications of neutrons using particle accelerators

Chichester

2009

View full text Add to dashboard Cite

show abstract

“…Contamination of soils, and drinking water by chlorinated compounds poses a serious challenge at many industrial and commercial sites [1,2]. A first indication of the degree of contamination is by measuring the salinity (total dissolved salt contents) of water or, more specific, the total chlorine amount in water.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo study of a flexible device for in situ PGNAA using 241Am–Be source: application to total chlorine determination

Khelifi

Bode

2016

J Radioanal Nucl Chem

View full text Add to dashboard Cite

MCNP5 has been used to optimize the design of a Prompt gamma ray neutron activation analysis (PGNAA) facility, which was subsequently constructed for quantification of total chlorine in water to simulate neutron transport from an 241 AmBe source into a PGNAA set-up. Modeling calculations were performed to optimize the experimental set-up for Cl measurements in water. The optimization with MCNP5 was focused on maximizing the thermal neutrons flux which leads to improving the gamma prompt production after neutron capture in a water sample. The influence of dimensions and materials for the neutron collimation as well as the dimensions of the sample together were studied. A PGNAA facility with an 241 AmBe neutron source was built based on the optimized configuration and used to determine chlorine concentration. Measured values of the chlorine count rate were plotted versus the NaCl in water. The count rate versus amount of chlorine show a good coefficient of correlation of the linear fit. The result permits PGNAA to be a valuable diagnostic tool for getting an indication of the salinity contamination of water.

show abstract

“…The unfolding of gamma-ray spectra is a commonly encountered aspect of inverse radiation analyzers that have found applications within a variety of fields such as medicine, industry as well as homeland security (Ali and Rogers, 2012 [1]; Borsaru et. al.…”

Section: Introductionmentioning

confidence: 99%

“…al. 2006 [2]; Im and Song, 2009[6]; Meric et. al., 2011[7]; Molnr, 2004[10]; Zhang and Gardner, 2004[13]).…”

Section: Introductionmentioning

confidence: 99%

A Geometric Approach to Spectral Analysis

Melo¹,

Meriç²,

Silva³

et al. 2017

Preprint

View full text Add to dashboard Cite

Analyses of gamma-ray spectra, acquired through non-invasive techniques, have found applications in fields such as medicine, industry and homeland security. Constituent gamma-ray spectra of a chemical compound have been determined from its sole spectrum through a forward Monte Carlo simulation coupled with a least squares method (MCLLS). The method's limitations include its linearity assumption and its oversensitivity to correlated or noisy data, which render the method unfit to deal with such numerical ill conditioning. Recently this issue was tackled by iteratively reducing the condition number of the linear system of equations. Despite its superior results, it is not suitable for cases where there are missing libraries in the analysis. Our work introduces a novel framework that allows treating spectral analyses problems through geometrical insights. Based on this it was possible to propose solutions to three problems regarding the missing library: to find its photopeak, its most probable fraction, and an envelope around its spectrum. We successfully validated these on some Monte Carlo-generated radionuclide gamma-ray spectra.

show abstract

In situ determination of salinity by PGNAA

Cited by 18 publications

References 3 publications

Production and applications of neutrons using particle accelerators

Production and applications of neutrons using particle accelerators

Monte Carlo study of a flexible device for in situ PGNAA using 241Am–Be source: application to total chlorine determination

A Geometric Approach to Spectral Analysis

Contact Info

Product

Resources

About