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- Author:
- Galina Yakubova, et al. ; Aleksandr Kavetskiy; Stephen A. Prior; H. Torbert; Show all 4 Authors
- Source:
- Nuclear instruments & methods in physics research 2018 v.433 no. pp. 80-86
- ISSN:
- 0168-583X
- Subject:
- detection limit; electronics; energy; gamma spectrometry; graphene; image analysis; neutron activation analysis; neutron probes; neutrons; particle image velocimetry; radiation physics
- Abstract:
- ... An associated particle imaging (API) experimental setup with nanosecond precision electronics was constructed and tested. This API setup has the ability to measure alpha-gamma coincidence (timing) spectra, time correlated energy gamma spectra, and energy correlated timing spectra. The speed of 14.1MeV neutron was defined from measurement of carbon energy correlated timing spectra. The measured valu ...
- Handle:
- 10113/6563659
- DOI:
- 10.1016/j.nimb.2018.07.028
- https://doi.org/10.1016/j.nimb.2018.07.028
- Author:
- Galina Yakubova, et al. ; Aleksandr Kavetskiy; Stephen A. Prior; H. Allen Torbert; Show all 4 Authors
- Source:
- Compost science & utilization 2019 v.27 no.3 pp. 146-160
- ISSN:
- 2326-2397
- Subject:
- Monte Carlo method; ammonium; calibration; carbon; carbon nitrogen ratio; chemical analysis; composts; computer simulation; gamma radiation; irradiation; laboratory experimentation; neutrons; nitrates; nitrogen; nondestructive methods
- Abstract:
- ... The possible application of Pulsed Fast/Thermal Neutron Analysis (PFTNA) for determining the carbon-to-nitrogen ratio (C/N) of compost will be discussed. This analysis method has several advantages over traditional chemical analysis, including that it is a nondestructive in situ method that does not require extensive sample collection and it analyzes much larger volumes of material (∼1 m³) than tr ...
- Handle:
- 10113/6563712
- DOI:
- 10.1080/1065657X.2019.1630339
- https://doi.org/10.1080/1065657X.2019.1630339
- Author:
- Galina Yakubova, et al. ; H. Allen Torbert; Aleksandr Kavetskiy; Stephen A. Prior; Show all 4 Authors
- Source:
- Applied radiation and isotopes 2019 v.150 no. pp. 127-134
- ISSN:
- 0969-8043
- Subject:
- Monte Carlo method; neutron probes; neutrons; simulation models; soil carbon; soil density; soil sampling; soil water content
- Abstract:
- ... Laboratory determination of carbon content in 30-50kg soil samples is described. The method is based on the tagged neutron technique. Procedure for carbon determination in such samples was developed based on a physical model and Monte-Carlo simulations (Geant4) of neutron stimulated gamma spectra. Measurement results of samples with different density and moisture demonstrate good agreement with sta ...
- Handle:
- 10113/6579858
- DOI:
- 10.1016/j.apradiso.2019.05.028
- CHORUS:
- 10.1016/j.apradiso.2019.05.028
- https://doi.org/10.1016/j.apradiso.2019.05.028
- Author:
- Galina Yakubova, et al. ; Stephen A. Prior; A. Kavetskiy; H. A. Torbert; Show all 4 Authors
- Source:
- Applied radiation and isotopes 2017 v.128 no. pp. 237-248
- ISSN:
- 0969-8043
- Subject:
- Monte Carlo method; computer simulation; detection limit; model validation; neutron diffraction; neutrons; prototypes; soil carbon; soil sampling
- Abstract:
- ... Computer Monte-Carlo (MC) simulations (Geant4) of neutron propagation and acquisition of gamma response from soil samples was applied to evaluate INS system performance characteristic [minimal detectible level (MDL), sensitivity] for soil carbon measurement. The INS system model with best performance characteristics was determined based on MC simulation results. Measurements of MDL using an experi ...
- Handle:
- 10113/6571358
- DOI:
- 10.1016/j.apradiso.2017.07.003
- https://doi.org/10.1016/j.apradiso.2017.07.003
- Author:
- Galina YAKUBOVA, et al. ; Aleksandr KAVETSKIY; Nikolay SARGSYAN; Clyde WIKLE; Stephen A. PRIOR; Henry Allen TORBERT; Bryan A. CHIN; Show all 7 Authors
- Source:
- Pedosphere 2019 v.29 no.3 pp. 334-343
- ISSN:
- 1002-0160
- Subject:
- bitumen; carbon; carbon sequestration; chemical analysis; global positioning systems; soil carbon
- Abstract:
- ... Soil carbon mapping is extremely useful in assessing the effect of land management practices on soil carbon storage. Applications of neutron-gamma analysis in scanning mode for mapping of soil carbon are discussed. A Global Positioning System (GPS) device and softwares required to simultaneously acquire gamma signals and geographical positions during scanning operations were added to an existing m ...
- DOI:
- 10.1016/S1002-0160(19)60806-4
- https://doi.org/10.1016/S1002-0160(19)60806-4
- Author:
- Galina Yakubova, et al. ; Aleksandr Kavetskiy; Stephen A. Prior; H. Allen Torbert; Show all 4 Authors
- Source:
- Applied Radiation and Isotopes 2016 v.107 no. pp. 299-311
- ISSN:
- 0969-8043
- Subject:
- aluminum; carbon; construction materials; gamma radiation; isotopes; neutrons; radionuclides; soil; soil sampling; spectral analysis
- Abstract:
- ... The problem of gamma spectrum peak identification arises when conducting soil carbon analysis using the inelastic neutron scattering (INS) system. Some spectral peaks could be associated with radioisotopes appearing due to neutron activation of both the measurement system and soil samples. The investigation of “hot background” gamma spectra from the construction materials, whole measurement system ...
- Handle:
- 10113/5454525
- DOI:
- 10.1016/j.apradiso.2015.11.012
- https://doi.org/10.1016/j.apradiso.2015.11.012
- Author:
- Galina Yakubova, et al. ; Aleksandr Kavetsiy; Stephen A. Prior; H Allen Torbert; Show all 4 Authors
- Source:
- Vadose Zone Journal 2015 v.15 no.2 pp. -
- ISSN:
- 1539-1663
- Subject:
- Monte Carlo method; calibration; carbon; combustion; measuring devices; models; neutrons; soil
- Abstract:
- ... The herein described inelastic neutron scattering (INS) method of measuring soil carbon was based on a new procedure for extracting the net carbon signal (NCS) from the measured spectra and determination of the average carbon weight percent in the upper ?8-cm soil layer (AvgCw%8). The NCS extraction utilized the net-INS spectrum, which was the difference between the INS and thermal neutron captu ...
- Handle:
- 10113/5430223
- DOI:
- 10.2136/vzj2015.04.0056
- https://doi.org/10.2136/vzj2015.04.0056
- Author:
- Galina Yakubova, et al. ; Aleksandr Kavetskiy; Stephen A. Prior; H. Allen Torbert; Show all 4 Authors
- Source:
- Applied radiation and isotopes 2016 v.113 pp. 33-39
- ISSN:
- 0969-8043
- Subject:
- Monte Carlo method; carbon; combustion; isotopes; neutron probes; soil; soil analysis
- Abstract:
- ... Inelastic neutron scattering (INS) was applied to determine soil carbon content. Due to non-uniform soil carbon depth distribution, the correlation between INS signals with some soil carbon content parameter is not obvious; however, a proportionality between INS signals and average carbon weight percent in ~10 cm layer for any carbon depth profile is demonstrated using Monte-Carlo simulation (Geant ...
- Handle:
- 10113/62484
- DOI:
- 10.1016/j.apradiso.2016.04.013
- https://doi.org/10.1016/j.apradiso.2016.04.013
- Author:
- Galina Yakubova, et al. ; Lucian Wielopolski; H. Allen Torbert; Stephen A. Prior; Show all 4 Authors
- Source:
- Soil science 2014 v.179 no.12 pp. 529-535
- ISSN:
- 0038-075X
- Subject:
- neutron probes; soil organic carbon; models; soil; soil analysis; laboratory experimentation; combustion; soil management; field experimentation; cropping sequence
- Abstract:
- ... Cropping history in conjunction with soil management prac- tices can have a major impact on the amount of organic carbon stored in soil. Current methods of assessing soil carbon based on soil coring and sub- sequent processing procedures before laboratory analysis are labor inten- sive and time-consuming. Development of alternative methods that can make in situ field measurements of soil carbon is ...
- Handle:
- 10113/62373
- DOI:
- 10.1097/SS.0000000000000099
- https://doi.org/10.1097/SS.0000000000000099