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Radiācijas defektu pētījumi ar EPR metodi LiBaF3 kristālā

2004

Izpētīts ar rentgenu istabas temperatūrā apstarotā L i B a F 3 kristālā radīta defekta EPR spektrs. EPR spektrs sastāv no apmēram 35 ekvidistantām līnijām. Defekts ir nestabils Jienas gaismā, bet tumsā sabrūk dažu stundu laikā. Šīs līnijas magnētiskā lauka orientācijā mralēli [111] kristāla asij atrodas vienādos attālumos (ar soli 0,9 mT) ar intensitāšu sadalījumu tuvu binomiālajam. EPR spektru var aprakstīt kā nesapārota spina S = 1/2 hiper- >īkstruktūras (liss) mijiedarbību ar divām ekvivalentu kaimiņu kodolu spinu grupām: 2 Li kodoliem pirmajā grupā un 8 F kodoliem otrajā grupā. Šāds modelis atbilst F-tipa centram elektrons atrodas fluora vakancē) LiBaF3 kristālā. Līniju intensitāšu stip…

LiBaF3 kristāliLiBaF3 crystalsCietvielu fizika:NATURAL SCIENCES::Physics::Atomic and molecular physics [Research Subject Categories]Elektronu paramagnētiskā rezonanseRadiācijas defektiElektronu spinu rezonanseElectron paramagnetic resonanceEPR spektroskopijaRadiation defectsElectron paramagnetic resonance spectroscopy

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