A high‐precision electron paramagnetic resonance study of Gd3+in single crystals of the lanthanide ethyl sulfate nonahydrates near room temperature

1979 ◽  
Vol 70 (8) ◽  
pp. 3764-3774 ◽  
Author(s):  
Roger E. Gerkin ◽  
William J. Rogers
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
High Precision ◽  
Room Temperature ◽  
Electron Paramagnetic Resonance Study ◽  
Paramagnetic Resonance ◽  
Ethyl Sulfate ◽  
Electron Paramagnetic

EPR of Gamma-irradiated L-Glutamine Hydrochloride and N-Carbamoyl-L-glutamic Acid

2005 ◽  
Vol 60 (7) ◽  
pp. 549-553 ◽  
Author(s):  
Şemsettin Osmanoğlua ◽  
Murat Aydın ◽  
M. Halim Başkana
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Glutamic Acid ◽  
Radiation Damage ◽  
Single Crystals ◽  
Room Temperature ◽  
Paramagnetic Resonance ◽  
Temperature Radiation ◽  
Gamma Irradiated ◽  
Electron Paramagnetic

The electron paramagnetic resonance spectra of γ -irradiated L-glutamine hydrochloride and N-carbamoyl- L-glutamic acid single crystals have been investigated at room temperature. Radiation damage centres are attributed to ĊH, ṄH2 and CH2Ċ(NH2)COOH radicals.

Electron paramagnetic resonance study of V4+-doped KTiOPO4 single crystals

1994 ◽  
Vol 55 (11) ◽  
pp. 1221-1226 ◽  
Author(s):  
Kuo-Tung Liu ◽  
Jiang-Tsu Yu ◽  
Ssu-Hao Lou ◽  
Chung-Hsien Lee ◽  
Yutung Huang ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Electron Paramagnetic Resonance Study ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Electron Paramagnetic Resonance Study of Single Crystals of Horse Heart Ferricytochrome c at 4.2 °K

1972 ◽  
Vol 50 (10) ◽  
pp. 1048-1055 ◽  
Author(s):  
Colin Mailer ◽  
C. P. S. Taylor
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Electron Paramagnetic Resonance Study ◽  
Field Potential ◽  
Personal Communication ◽  
Chem Phys ◽  
Paramagnetic Resonance ◽  
Ferricytochrome C ◽  
G Value ◽  
Electron Paramagnetic

Electron paramagnetic resonance (E.P.R.) spectra from single crystals of horse heart ferricytochrome c at 4.2 °K were analyzed to obtain the orientation of the principal g values relative to the crystallographic axes. The axis of the largest principal g value (g3 = 3.06) was within 5° of the heme normal direction reported in the X-ray structure of the same crystals (Dickerson et al.: J. Biol. Chem. 246, 1511 (1971)). The other two g axes (g1 = 1.25, g2 = 2.25) lie within 5° of the N–Fe–N directions in the heme ring, in contrast to met-myoglobin azide (Helcké et al.: Proc. R. Soc. B169, 275 (1968)) and cyanide (Blumberg, W. E.: personal communication) where they lie ~ 45° from the N–Fe–N directions. A version of Eisenberger and Pershan's theory (J. Chem. Phys. 47, 327 (1967)) was used to explain the 400–2000 G variation in linewidth on crystal rotation. The results were explained by combining the broadening produced by a distribution of rhombic crystal field potential (r.m.s. deviation 11%) over the molecular population, with that from a variation in the directions of the principal g values caused by misorientation (r.m.s. deviation 1.5°) of the molecules in the crystal.

Electron Paramagnetic Resonance Study of Ion-Implanted Photorefractive Crystals

1997 ◽  
Vol 504 ◽  
Author(s):  
A. Darwish ◽  
D. Ila ◽  
E. K. Willams ◽  
D. B. Poker ◽  
D. K. Hensley
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ion Implantation ◽  
Room Temperature ◽  
Electron Paramagnetic Resonance Study ◽  
Paramagnetic Resonance ◽  
Photorefractive Crystals ◽  
Laser Illumination ◽  
Epr Signal ◽  
Electron Paramagnetic

ABSTRACTThe effect of the ion implantation (Fe) on LiNbO3, MgO, and A12O3 crystals is studied using electron paramagnetic resonance (EPR). EPR measurements on these crystals were performed as a function of fluence at room temperature. The fluence was 1 × 1014 and 1 × 1016 ions/cm2. The unpaired carrier concentration increases with increasing fluence. The photosensitivity of these crystals was determined by observing in situ the effect of the laser illumination on the EPR signal and measuring the decay and the growth of the EPR signal. The EPR signal of Fe3+ was found to decrease in both MgO, and Al2O3; and was found to increase in LiNbO3. This indicated that in case of MgO, and A12O3 Fe3+ will transfer into Fe2+/Fe4+, but in case of LiNbO3 Fe2+/ Fe4+ will transfer into Fe3+; increasing the EPR signal. This was found primary due to some Fe2+ and Fe4+ ions, which is not intentionally doped on the LiNbO3 crystal but exist as a defect on the crystal.

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