RADIATION DAMAGE IN SOLID TETRAMETHYL AMMONIUM HALIDES. FREE RADICALS STABLE AT LOW TEMPERATURE

Technical Report · Mon Jan 01 04:00:00 EST 1962

OSTI ID:4694570

Tench, A J

Electron spin resonance (ESR) spectral studies were carried out on tetramethyl ammonium halides which were irradiated at 298 and 77 deg K. The ESR spectra of the iodide and bromide irradiated at 298 deg K consisted of a single line of width 30 to 40 gauss, while that of the chloride gave a weak complex pattern. When the irradiations and ESR studies were performed at 77 deg K, considerable fine structure was observed which was ccntered about g = 2.003 plus or minus 0.001. The iodide spectrum at 77 deg K is a quartet superimposed on a broad line and is not materially affected by thermal annealing at 148 deg K. The quartet is identified as a methyl radical. The bromide spectrum at 77 deg K consists of a quartet superimposed on a triplet, and thermal annealing at 148 deg K reduces it to a triplet and at 298 deg K to a single broad line. The triplet appears to be (CH/sub 3/)/sub 3/NCH/sub 2/. The chloride spectrum is similar to the bromide except that the quartet is just observable and slowly anneals at 77 deg K. (D.L.C.)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• DOE Contract Number: AT(30-2)-GEN-16
• NSA Number: NSA-17-028938
• OSTI ID: 4694570
• Report Number(s): BNL-6401
• Country of Publication: United States
• Language: English

Related Subjects

AMMONIUM COMPOUNDS
ANNEALING
BROMINATED HYDROCARBONS
CHEMISTRY
ELECTRONS
FREE RADICALS
HALIDES
HYPERFINE STRUCTURE
IRRADIATION
METHYL RADICALS
ORGANIC BROMINE COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC IODINE COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RADIATION EFFECTS
RESONANCE
SOLIDS
SPECTRA
SPIN
STABILITY
TEMPERATURE