scholarly journals Simulation of the cement measurement based on the pulse DT neutron generator: A Monte Carlo study

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252078
Author(s):  
Yadong Gao ◽  
Jiaming Li ◽  
Jichen Li ◽  
Linmao Liu
Keyword(s):  
Monte Carlo ◽  
Neutron Generator ◽  
Gamma Ray ◽  
Monte Carlo Study ◽  
Neutron Radiation ◽  
Major Elements ◽  
Pulse Mode ◽  
Cement Sample ◽  
Saturation Factor ◽  
Gamma Ray Detector

The PGNAA system for the cement measurement was simulated based on Monte Carlo method. The sizes of the moderator and reflector for the 14 MeV DT neutron generator were optimized for fast and thermal neutron outputs. The DT neutron generator was simulated at the pulse mode, and the gamma-ray detector was set as LaBr3(Ce) scintillator. The characteristic peaks of the major elements (Ca, Si, Al, Fe) can be identified from the gamma-ray spectra which induced at the different time intervals of the neutron radiation. For the different thicknesses of the cement sample the ratios of the gamma-ray peaks were observed, and the result showed that when the thickness was between 20 to 30 cm, the ratios became stable. With the ratios, we can calculate the iron modulus, silica modulus and lime saturation factor.

Abstract ID: 171 A Monte Carlo study to reduce range uncertainty in proton beam therapy via prompt gamma-ray detection

2018 ◽  
Vol 45 ◽  
pp. S2 ◽  
Author(s):  
C. Panaino ◽  
M.J. Taylor ◽  
R. MacKay ◽  
M.J. Merchant ◽  
T. Price ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Proton Beam ◽  
Gamma Ray ◽  
Monte Carlo Study ◽  
Proton Beam Therapy ◽  
Prompt Gamma

Monte Carlo simulation of induced radioactive background in gamma-ray detector materials

1998 ◽  
Vol 45 (3) ◽  
pp. 894-902 ◽  
Author(s):  
P.R. Truscott ◽  
H.E. Evans ◽  
C.S. Dyer ◽  
M. Cosby ◽  
P.R. Knight ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Gamma Ray ◽  
Radioactive Background ◽  
Gamma Ray Detector ◽  
Detector Materials

ADRON instrument for future missions to Moon and Mars: active neutron and gamma-ray spectroscopy

2021 ◽  
Author(s):  
Maxim Mokrousov ◽  
Dmitriy Golovin ◽  
Igor Mitrofanov ◽  
Alexander Kozyrev ◽  
Maxim Litvak ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Neutron Generator ◽  
Gamma Ray ◽  
Pulse Neutron ◽  
Good Time ◽  
Pulse Emission ◽  
Epithermal Neutrons ◽  
Mass Fractions ◽  
Detector Block ◽  
Gamma Ray Detector

<p>The series of ADRON instruments are developed in Russian Space Research Institute (IKI) for Russian Luna-25, Luna-27 and Roscosmos-ESA ExoMars-2022 landers. The main goal of this experiment is studying of elemental composition of planetary sub-surface down to 1 m. Using pulsing neutron generator and observing albedo after-pulse neutron and gamma-ray emission from the soil, one can detect layering stratification of hydrogen and mass fractions of other elements.</p><p>Both instruments consist of two blocks: pulsing neutron generator (PNG) with 14 MeV neutron pulse duration around 1 microsecond, and detector block with neutrons and gamma-ray detectors based on <sup>3</sup>He counters and CeBr<sub>3</sub> (LaBr3) scintillator, respectively. <sup>3</sup>He counters allow to detect thermal and epithermal neutrons, which are the most sensitive to hydrogen in underlying soil, and gamma-ray detector allows to detect nuclear lines at the energy range from 200 keV up to 10 MeV. Readout and digital electronics is designed to minimize the dead-time of signal processing. It allows to accumulate the after-pulse profiles of emission of neutrons and gamma-rays with very good time (from 2 microsecond) and spectral resolutions (about 4 % for 662 keV).</p><p>The results of laboratory measurements and numerical simulations for ADRON units will be presented for post-pulse emission of neutrons and gamma rays from the planetary soil with different water content, elementary composition and layering structure.</p><p> </p>

A Monte-Carlo study of a 3-D position sensitive detector for gamma-ray astronomy

1991 ◽  
Vol 11 (8) ◽  
pp. 343-347 ◽  
Author(s):  
G. Malaguti ◽  
E. Caroli ◽  
A.J. Dean ◽  
G. Di Cocco ◽  
F. Lei ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Gamma Ray ◽  
Monte Carlo Study ◽  
Position Sensitive Detector ◽  
Sensitive Detector ◽  
Gamma Ray Astronomy ◽  
Position Sensitive

scholarly journals A Monte Carlo Study of Gamma-Ray Pulsars in the Gould Belt

2004 ◽  
Vol 218 ◽  
pp. 419-420
Author(s):  
P. Leung ◽  
K. S. Cheng ◽  
L. Zhang ◽  
Z. J. Jiang
Keyword(s):  
Monte Carlo ◽  
Gamma Ray ◽  
Monte Carlo Study ◽  
Gap Model ◽  
Radio Pulsars ◽  
Gould Belt ◽  
Monte Carlo Techniques ◽  
Magnetic Inclination ◽  
Self Consistent ◽  
Initial Magnetic Field

We use Monte Carlo techniques to simulate the statistical properties of rotation-powered pulsars in the Gould Belt. The gamma-ray properties of these pulsars are calculated by using a self-consistent outer gap model and other pulsar properties, i.e., initial magnetic field and period, and velocity distribution of the neutrons stars at birth, are obtained from the statistics of radio pulsars. We obtain distributions of the magnetic inclination angle, period, distance and age for these gamma-ray pulsars in the Gould Belt.

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