ELECTRON SPIN RESONANCE IN A GAMMA-IRRADIATED SINGLE CRYSTAL OF L-CYSTINE DIHYDROCHLORIDE
The electron spin resonance of a gamma -irradiated single crystal of L- cystine dihydrochloride was measured at 9 and 24 khic for various orientations of the crystal in the magnetic field. The resonance pattern was found to be a doublet, the spacing between the components of which is independent of the crystal orientation as well as of the strength of the static magnetic field. The spectroscopic splitting factor was found to be anisotropic with the principal values: gu = 2.003, gv = 2.025, and gw = 2.053. A model of the free radical, COOHCH(NH/sub 2/)CH/sub 2/S, in which the electron spin density is mainly concentrated in a nonbonding 3 p orbital of the sulfur atom, is proposed. The model accounts very well for the principal values of the g tensor, as well as their directions relative to the atomic configuration. It also can give rise to the observed proton hyperfine structure. (auth)
- Research Organization:
- Duke Univ., Durham, N.C.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-011732
- OSTI ID:
- 4077057
- Journal Information:
- Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 34; ISSN JCPSA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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