scholarly journals Testing the NASA BioSentinel Pixel Dosimeter Using Gamma-ray and Neutron Sources at the LLNL Calibration Lab

2022 ◽  
Vol 122 (2) ◽  
pp. 344-348
Author(s):  
J. Homan ◽  
T. C. Lusby ◽  
A. J. Ricco ◽  
J. L. Mintz ◽  
L. A. Braby ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutron Sources

Gamma Ray Attenuation Coefficient Measurement in Energies 1172 keV and 1332 keV for Neutron Absorbent Saturated Solutions

2006 ◽  
Author(s):  
Majid Jalali
Keyword(s):  
Attenuation Coefficient ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Neutron Absorption ◽  
Attenuation Coefficients ◽  
Neutron Sources ◽  
Coefficient Measurement ◽  
Gamma Ray Attenuation ◽  
Mass Attenuation Coefficients ◽  
Saturated Solutions

The compounds, Na2B4O7, H3BO3, CdCl2 and NaCl and their solutions, attenuate gamma rays in addition to neutron absorption. These compounds are widely used in shielding of neutron sources, reactor control and neutron converters. Mass attenuation coefficients of gamma related to saturated solutions of the above four compounds, in energies 1172 keV and 1332 keV have been measured by NaI detector and agree very well with the results obtained by Xcom code. Experiment and computation show that, H3BO3 has the highest gamma ray attenuation coefficient among the aforementioned compounds.

scholarly journals Design Collimator and Dosimetry of in Vitro and in Vivo Test Using MCNP-X Code

2016 ◽  
Vol 1 (1) ◽  
pp. 14
Author(s):  
Sri Yuniarti ◽  
Yohannes Sardjono ◽  
Bilalodin Bilalodin
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Dose Calculation ◽  
Optimal Dose ◽  
Energy Agency ◽  
Neutron Sources ◽  
In Vivo Test ◽  
Simulation Results

Studies were carried out to collimator modelling and dosimetry BNCT of in vitro and in vivo test using MCNP-X code. Collimator modelling performed to obtain neutron beam as required by the International Atomic Energy Agency (IAEA). Dosimetry calculations performed to obtain the results of the dose calculation (dosimetry) in the application of BNCT.  Collimator modelling and dosimetry simulations performed with MCNPX program. Neutron sources used for simulation, namely cyclotrons HM-30, energy 30 MeV, the current is 1.1 mA. Collimator modelling utilizes to program MCNPX covers cells target as beryllium, collimator wall (reflector), moderate, filter, gamma-ray shielding, and aperture. The simulation results of the modelling are Φ<sub>epi </sub>1.02241x10<sup>10</sup> n/cm2 s, D<sub>f</sub>/Φ<sub>epi </sub>2.36487x10<sup>-11 </sup>Gy-cm<sup>2</sup>/n, D<sub>γ</sub>/Φ<sub>epi</sub> 4.68416x10<sup>-12</sup> Gy-cm<sup>2</sup>/n, Φ<sub>th</sub>/Φ<sub>epi </sub>3.76285x10<sup>-01</sup>, J/Φ<sub>epi </sub>8.37678x10<sup>3</sup>. Based on the calculation of the dose rate that has been done, the result that the optimal dose rate at a depth of 1cm.

Applications of Neutron Activation Analysis to Environmental and Biomedical Studies

1972 ◽  
Vol 16 ◽  
pp. 10-18
Author(s):  
H. R. Lukens ◽  
J. John
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Gamma Ray Spectrometry ◽  
Neutron Sources ◽  
The Past ◽  
Ultra Trace ◽  
Number Of Publications

The field of neutron activation analysis (NAA) has expanded significantly in the past decade, with the number of publications increasing from approximately 100 to more than 1000 per year. This phenomenon correlates with the greater availability of useful neutron sources, improvements in gamma-ray spectrometry equipment, and a rapid increase in successful NAA applications. A significant number of applications have been in the biomedical and environmental fields, especially in cases where elements must be measured at ultra-trace levels.

Tests of Instruments for Neutron and Gamma Ray Measurements at Several Radionuclide Neutron Sources

1997 ◽  
Vol 70 (1) ◽  
pp. 353-356 ◽  
Author(s):  
F. Spurn  ◽  
I. Votockov  ◽  
J-F. Bottollier-Depois ◽  
J. Kurkdjian ◽  
D. Paul
Keyword(s):  
Gamma Ray ◽  
Neutron Sources
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