Track effects in radiation chemistry: production of HO/sub 2/ within the track core in the heavy-particle radiolysis of water

Journal Article · Thu Jul 03 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100405a037· OSTI ID:5658041

La Verne, J A; Schuler, R H; Burns, W G

The radiation chemical yields of HO/sub 2/ radicals produced by /sup 1/H, /sup 4/He, /sup 7/Li, /sup 9/Be, /sup 11/B, /sup 12/C, and /sup 20/Ne ions having energies up to 35 MeV have been determined. At energies above 10 MeV the yield with protons approaches the value of 0.020 molecules/100 eV observed with fast electrons. The yield increases with increasing mass and decreasing energy of the irradiating particle and exceeds 0.2 molecules/100 eV for low-energy /sup 9/Be, /sup 11/B, /sup 12/C, and /sup 20/Ne ions. Extrapolation indicates an upper limit of 0.37 molecules/100 eV for more massive ions. We conclude that HO/sub 2/ is produced mainly in the track core, so that H/sup 2/O production yields observed for different particles having the same linear energy transfer (LET) shows that these yields are not strongly dependent on the Z of the irradiating particle. After correction for energy lost to delta rays, the LET dependence of the yield pertinent to the core is common to all of the particles studied, indicating that in this case the track has expanded to some extent before reaction occurs.

• Research Organization: Univ. of Notre Dame, IN
• OSTI ID: 5658041
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:14; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
654001 -- Radiation & Shielding Physics-- Radiation Physics
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
BERYLLIUM 9 BEAMS
BORON 11 BEAMS
CARBON 12 BEAMS
CHEMICAL PREPARATION
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ENERGY RANGE
ENERGY TRANSFER
EXPERIMENTAL DATA
HELIUM 4 BEAMS
HYDROGEN COMPOUNDS
HYDROPEROXY RADICALS
INFORMATION
ION BEAMS
LET
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEON 20 BEAMS
NUCLEON BEAMS
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE BEAMS
PROTON BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
SYNTHESIS
WATER
YIELDS