The Ionization by Polonium Alpha Particles in Air and the Average Energy to Make an Ion Pair

1960 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
William P. Jesse
Keyword(s):  
Average Energy ◽  
Ion Pair ◽  
Alpha Particles

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.

Absolute Calibration of Photoelectric Diodes

1975 ◽  
Vol 19 ◽  
pp. 597-606 ◽  
Author(s):  
R. H. Day ◽  
E. J. T. Burns
Keyword(s):  
Energy Range ◽  
Average Energy ◽  
Ion Pair ◽  
Absolute Calibration ◽  
Tube System ◽  
X Ray

Photoelectric diodes with aluminum photocathod.es have been calibrated in the energy range from 0.1 keV to 1 keV with a multielement Henke X-ray tube system using regenerative monochromatic filters. The calibration is performed at six energies: (1) Be - (0.109 keV) , (2) C - Kα (0.277 keV), (3) Ti – Lα1, 2 (0.452 keV) , (4) Fe – Lα1, 2 (0.705 keV), (5) Cu – Lα1, 2 (0.930 keV), and (6) Al – Kαl, 2 (1.487 keV). Several different 99.9%, (1000 series) aluminum foils were calibrated for use as cathodes. In addition, the average energy per electron ion pair, W, has been measured for methane at these same energies.

Energy per Ion Pair for 5-Mev Alpha-Particles in Helium

1953 ◽  
Vol 90 (1) ◽  
pp. 160-160 ◽  
Author(s):  
T. E. Bortner ◽  
G. S. Hurst
Keyword(s):  
Ion Pair ◽  
Alpha Particles

Alpha-Particle Ionization in Pure Gases and the Average Energy to Make an Ion Pair

1953 ◽  
Vol 90 (6) ◽  
pp. 1120-1121 ◽  
Author(s):  
William P. Jesse ◽  
John Sadauskis
Keyword(s):  
Alpha Particle ◽  
Average Energy ◽  
Ion Pair
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