Research output: Contribution to journal › Conference article › peer-review
Stretching mode interaction of equal and unequal pairs of SeH- and SeD- defects in alkali halides. / Afanasiev, A. D.; Ivanov, A. A.; Luty, Fritz; Melikova, S. M.; Shchepkin, D. N.
In: Radiation Effects and Defects in Solids, Vol. 151, No. 1, 1999, p. 311-315.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Stretching mode interaction of equal and unequal pairs of SeH- and SeD- defects in alkali halides
AU - Afanasiev, A. D.
AU - Ivanov, A. A.
AU - Luty, Fritz
AU - Melikova, S. M.
AU - Shchepkin, D. N.
PY - 1999
Y1 - 1999
N2 - The stretching-mode (SM) absorption of isolated SeH- or SeD- molecular defects in alkalihalides show a resolved spectral structure due to the different reduced masses of the six natural stable Se isotopes. In a FTIR study of these defects in KCl and KBr, we have observed new SM absorptions of defect pairs which scale quadratically with the defect concentration. For `equal pairs' SeH- -SeH- and SeD- -SeD-, the fundamental SM absorption shows (in contrast to `mixed' SeH- -ScD- pairs) a distinctly different Se-isotope splitting, while the overtone splitting of all pairs remains similar to that of the isolated defects. Besides a simple classical coupled-oscillator treatment, we present a quantum-mechanical calculation, explaining the observed spectral behavior by resonance interaction of the molecules in pairs of equal (or `nearly equal') frequencies.
AB - The stretching-mode (SM) absorption of isolated SeH- or SeD- molecular defects in alkalihalides show a resolved spectral structure due to the different reduced masses of the six natural stable Se isotopes. In a FTIR study of these defects in KCl and KBr, we have observed new SM absorptions of defect pairs which scale quadratically with the defect concentration. For `equal pairs' SeH- -SeH- and SeD- -SeD-, the fundamental SM absorption shows (in contrast to `mixed' SeH- -ScD- pairs) a distinctly different Se-isotope splitting, while the overtone splitting of all pairs remains similar to that of the isolated defects. Besides a simple classical coupled-oscillator treatment, we present a quantum-mechanical calculation, explaining the observed spectral behavior by resonance interaction of the molecules in pairs of equal (or `nearly equal') frequencies.
UR - http://www.scopus.com/inward/record.url?scp=0033281626&partnerID=8YFLogxK
U2 - 10.1080/10420159908245973
DO - 10.1080/10420159908245973
M3 - Conference article
AN - SCOPUS:0033281626
VL - 151
SP - 311
EP - 315
JO - Radiation Effects and Defects in Solids
JF - Radiation Effects and Defects in Solids
SN - 1042-0150
IS - 1
T2 - Proceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98
Y2 - 6 June 1998 through 11 June 1998
ER -
ID: 90572163