The error of a separate determination of the absorbed dose of neutrons and gamma radiation with ionization chambers

1973 ◽  
Vol 16 (8) ◽  
pp. 1228-1229 ◽  
Author(s):  
Yu. I. Bregadze ◽  
P. F. Maslyaev
Keyword(s):  
Gamma Radiation ◽  
Absorbed Dose ◽  
Separate Determination ◽  
Ionization Chambers

Determination of water absorbed dose in a carbon ion beam using thimble ionization chambers

1999 ◽  
Vol 44 (5) ◽  
pp. 1193-1206 ◽  
Author(s):  
G H Hartmann ◽  
O Jäkel ◽  
P Heeg ◽  
C P Karger ◽  
A Krießbach
Keyword(s):  
Ion Beam ◽  
Absorbed Dose ◽  
Ionization Chambers ◽  
Carbon Ion ◽  
Carbon Ion Beam

Reference dosimetry for fast neutron and proton therapy

2001 ◽  
Vol 89 (4-5) ◽  
Author(s):  
D.T.L. Jones
Keyword(s):  
Fast Neutron ◽  
Proton Therapy ◽  
Proton Energy ◽  
Nuclear Reactions ◽  
Absorbed Dose ◽  
Fast Neutrons ◽  
Ionization Chambers ◽  
Atomic Electrons

Fast neutrons and protons undergo fundamentally different interactions in tissue. The former interact with nuclei, while the latter, as in the case of photons, interact mainly with atomic electrons. Protons do, however, also undergo some nuclear reactions, the probability of which increases with proton energy. The determination of the reference absorbed dose in a patient for the two modalities is described. Two internationally accepted protocols have been formulated and have been published in ICRU reports. For both modalities the practical means for determining the reference absorbed dose in a patient involves the use of thimble ionization chambers calibrated in

The use of calcite mineral thermoluminescence for the determination of previously received gamma radiation dose in foodstuffs/E1 uso de la termoluminiscencia de la calcita para la determinación de la dosis de radiación gamma de alimentos previamente irradiados

1996 ◽  
Vol 2 (4) ◽  
pp. 249-254 ◽  
Author(s):  
M. Urbina ◽  
P. Beneitez ◽  
A. Millán ◽  
T. Calderón
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Absorbed Dose ◽  
High Dose ◽  
Gamma Radiation Dose ◽  
Saturation Dose ◽  
Potential Use ◽  
Dose Radiation ◽  
Level Of Agreement

This paper describes the potential use of calcite mineral dust as a high-dose radiation dosemeter. The results obtained show that saturation dose in natural calcite is of the order of 7 kGy. Measurements of absorbed dose, for samples previously irradiated with known gamma doses, showed a good level of agreement between actual doses and calculated doses, although the level of scatter is high.

National primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2019

2020 ◽  
pp. 8-12
Author(s):  
Alexandr V. Oborin ◽  
Anna Y. Villevalde ◽  
Sergey G. Trofimchuk
Keyword(s):  
Gamma Radiation ◽  
Energy Flux ◽  
Primary Standard ◽  
Average Energy ◽  
Ion Pair ◽  
X Rays ◽  
Exposure Rate ◽  
Ionization Chambers ◽  
Air Kerma ◽  
Air Kerma Rate

The results of development of the national primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2011 in 2019 are presented according to the recommendations of the ICRU Report No. 90 “Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications”. The following changes are made to the equations for the units determination with the standard: in the field of X-rays, new correction coefficients of the free-air ionization chambers are introduced and the relative standard uncertainty of the average energy to create an ion pair in air is changed; in the field of gamma radiation, the product of the average energy to create an ion pair in air and the electron stopping-power graphite to air ratio for the cavity ionization chambers is changed. More accurate values of the units reproduced by GET 8-2019 are obtained and new metrological characteristics of the standard are stated.

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