DOSIMETRY OF IONIZING RADIATION BY REACTION WITH NITROGEN

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4645039

Dmitriev, M T

The amouut of NO/sub 2/ formed by irradiating air or a nitrogen--oxygen mixture is a measure of the radiation dose. The G yield for the formation of NO/ sub 2/ does not depend on the type of radiation but is dependent on temperature. The G yield in molecules of NO/sub 2/ per 100 ev is 1.35 at 0 deg C, 1.38 at 10 deg , 1.39 at 15 deg , 1.41 at 20 deg , 1.43 at 25 deg , and 1.46 at 30 deg C. A dose of 1 r corresponds to the following concentrations of NO/sub 2/ in air at 760 mm Hg std (in wt.%): 0.84 x 10/sup -8/ at 0 deg C, 0.66 x 10/sup -8/ at 15 deg C, and 0.67 x 10/sup -8/ at 20 deg C. The concentration of NO/sub 2/also depends on the composition of the nitrogen -- oxygen mixture, the temperature, and pressure. The concentration of NO/sub 2/ is directly proportional to the dose up to 1.5 x 10/sup 9/ rads: STANO/sub 2/! = kE. Here STANO/sub 2/! is the concentration of NO/sub 2/ in wt.%; E is the absorbed dose in rads, and k is a proportionality coefficient. At a temperature of 20 deg C and a pressure of 1 atm, the value of k is 5.12 x 10/sup -9/ for air, 2.86 x 10/sup -9/ for 90% N/sub 2/ + 10% O/sub 2/, 10/sup -9/ for 70% N/sub 2/ + 30% O/sub 2/, 7.98 x 10/sup -9/ for 50% N/sub 2/ + 50% O/sub 2/, and 4.08 x 10/sup -9/ for 15% N/sub 2/ + 85% O/ sub 2/. The value of k can be calculated for other compositions from the following equation: k = 32.0 n (1-n) 10/sup -9/, where n is the mole fraction of nitrogen in the gaseous mixture. The G yield of NO/sub 2/ increases with increasing pressure above l atm, but does not exceed 6 molecules of NO/sub 2//100 ev. Values of k are given at various pressures and temperatures. The G yield of NO/sub 2/ decreases on increasing the temperature above 200 deg C because of the thermal decomposition of NO/sub 2/ into NO and oxygen. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-039111
• OSTI ID: 4645039
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
AIR
CHEMISTRY
DECOMPOSITION
EFFICIENCY
HEATING
IONIZATION
MEASURED VALUES
MIXING
NITROGEN
NITROGEN OXIDES
NUMERICALS
OXYGEN
PRESSURE
QUANTITY RATIO
RADIATION CHEMISTRY
RADIATION DOSES
TEMPERATURE