/sup 13/N species formed by proton irradiation of water
We have shown that the irradiation of aerated water with 14.5-MeV protons produces as principal radioactive products nitrogen-13-labeled nitrate, nitrite, and ammonium ions. The yield of /sup 13/NH/sub 4//sup +/ varied from approximately 40% at low integrated dose (0.01 ..mu..Ah) to 0.4% at high integrated dose (25 ..mu..Ah), /sup 13/NO/sub 3//sup -/ varied from 50% at low dose to 85% at high dose. /sup 13/N/sub 2//sup -/ varied from 10% at low dose to 5% at high dose and 40% at intermediate doses. The results varied with recent use of target chamber. Induced radioactivity in the window foil was shown to have an effect on product composition. The effect of dissolved oxygen and certain additives (ethanol, ascorbic acid, formic acid, and ammonia) were investigated. In the absence of dissolved oxygen, or in the presence of ethanol, formic acid or ascorbic acid, almost pure /sup 13/NH/sub 3/ could be produced at doses up to 2..mu..Ah. The data are explained by postulating the initial production of /sup 13/NH/sub 3/ by successive abstraction of H atoms by the /sup 13/NH/sub 3/ to HNO/sub 2/ and HNO/sub 3/.
- Research Organization:
- Memorial Sloan-Kettering Cancer Center, New York, NY
- DOE Contract Number:
- EE-77-S-02-4268
- OSTI ID:
- 5561308
- Journal Information:
- Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 79:1; ISSN RAREA
- Country of Publication:
- United States
- Language:
- English
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400600* -- Radiation Chemistry
AMMONIUM COMPOUNDS
BEAMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
HYDROGEN COMPOUNDS
IONS
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LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
NITRATES
NITRITES
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NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NUCLEI
NUCLEON BEAMS
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PARTICLE BEAMS
PROTON BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOISOTOPES
RADIOLYSIS
WATER