Determination of penumbral widths from ion chamber measurements

2005 ◽  
Vol 32 (12) ◽  
pp. 3636-3640 ◽  
Author(s):  
D. Herrup ◽  
J. Chu ◽  
H. Cheung ◽  
M. Pankuch
Keyword(s):  
Ion Chamber ◽  
Chamber Measurements

Dosimetry in MARS spectral CT: TOPAS Monte Carlo simulations and ion chamber measurements

2017 ◽  
Vol 40 (2) ◽  
pp. 297-303
Author(s):  
Gray Lu ◽  
Steven Marsh ◽  
Jerome Damet ◽  
Pierre Carbonez ◽  
John Laban ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Spectral Ct ◽  
Ion Chamber ◽  
Chamber Measurements

scholarly journals EP-1693 Determination of the angular dependence of a CC04 ion chamber

2019 ◽  
Vol 133 ◽  
pp. S910-S911
Author(s):  
A. Prado ◽  
Á. Gaitán ◽  
M. Manzano ◽  
M. Leonor
Keyword(s):  
Angular Dependence ◽  
Ion Chamber

scholarly journals Calibration of spectrometric detectors for air kerma rates in environmental monitoring

2020 ◽  
Vol 35 (4) ◽  
pp. 323-330
Author(s):  
Marcel Ohera ◽  
Daniel Sas ◽  
Petr Sladek
Keyword(s):  
Monte Carlo Simulation ◽  
Hpge Detector ◽  
Absorbed Energy ◽  
Dose Rates ◽  
Ion Chamber ◽  
Air Kerma ◽  
Hpge Detectors ◽  
Different Types ◽  
Plastic Detector

The spectrometric systems, especially based on NaI(Tl) and HPGe detectors, are used for nuclide identification and calculation of their activities from the ground measurements and air-borne monitoring. The determination of the air kerma (dose) rates is also very important for environmental measurements. In such cases, the detectors should be calibrated for air kerma (dose) rates in nGyh?1 or ?Gyh?1. A simple calibration of NaI(Tl), HPGe as well as plastic detectors for the low-level air kerma rates is presented in this contribution. This calibration is based on comparing the relative absorbed energy rate in detectors (MeVs?1) calculated from spectra with the air kerma rates calculated by the Monte Carlo simulation and supplementary to the data from the RSS Reuter&Stokes high pressure ion chamber. This method also eliminates the conversion from the non-air kerma rates in crystals to the air kerma rates. Three different types of small cylindrical detectors were calibrated for the air kerma rates from the background of 26 nGyh?1 to some tens of ?Gyh?1 in the energy range to the maximum of 3 MeV. The results of calibrations of the 3" x 3" NaI(Tl), HPGe detector and a small plastic detector (made of polystyrene) including soxme examples of environmental measurements are presented.

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