Eldor investigations of radiation processes. Annual progress report, 1973- -1974

Technical Report · Tue Jan 01 04:00:00 EST 1974

OSTI ID:4354047

Kispert, L D

ESR and ELDOR investigations this past year of irradiated single crystals have shown a large crystals field dependence when bromine has been substituted for fluorine or hydrogen, possibly as a result of the large thermal motion of the bromine. The decay rate of the methyl radical in irradiated crystalline hydrates of alkali metal acetates has been found to be slowed by the formation of a cage-like structure of water molecules surrounding the methyl radical. ELDOR investigations of irradiated crystals have been successful in describing the process by which tunneling rotation of the methyl group at 20 deg K changes to classical rotation; establishing procedures for improving ELDOR spectral resolution at low temperatures; determining the effect of proton spin- flip spectral intensily on intermolecular relaxation and most significantly establishing that H-- D exchange reactions involving radicals can be successfully studied by ELDOR spectroscopy although they are too complex to be studied by ESR. In fact, two new H--D exchange reactions were found in irradiated glycine-d/sub 3/ crystals. A list of publications resulting from this project is included. (auth)

• Research Organization: Alabama Univ., University (USA). Dept. of Chemistry
• NSA Number: NSA-29-020687
• OSTI ID: 4354047
• Report Number(s): ORO--4062-19
• Country of Publication: United States
• Language: English

Related Subjects

*DEUTERIUM-- ISOTOPIC EXCHANGE
*GLYCINE-- RADIATION CHEMISTRY
*MONOCRYSTALS-- RADIATION CHEMISTRY
*RADIATION CHEMISTRY
ACETATES
ALKALI METAL COMPOUNDS
ELDOR
ELECTRON SPIN RESONANCE
METHYL RADICALS
N40230 -- Chemistry--Inorganic
Organic
& Physical Chemistry--Isotope Exchange & Isotope Separation
N40300* --Chemistry--Radiation Chemistry
RESEARCH PROGRAMS