Ülkü AKPINAR, Hüseyin YÜKSEL, Bilge YILDIRIM, Mehmet BİREY

$\gamma$-ışınlarına maruz bırakılan 4-metilbenzilamin glioksim tek kristalinin EPR ve simülasyon tekniği ile incelenmesi

$\gamma$ — ışınlarına maruz bırakılan 4-Metil Benzilamin Glioksim (4-MBG) tek kristallerinin elektron paramanyetik rezonansı, manyetik alanda kristalin farklı yönelimleri için gözlenmiş ve analiz edilmiştir. 4-MBG tek kristalleri 100 K ve 400 K arasındaki sıcaklıklarda incelenmiştir, g-faktörünün ortalama değeri ve aşırı ince yapı yarılmasının değerleri sırası ile g= 1,999, $a_N$ =14G, $a_{H(NH)}$ =13,5G ve $a_{CH_2}$ =7,5G olarak bulunmuştur. Çiftlenmemiş elektronun $P_{N(NH)}$= 0=5 ve $P_{H(NH)}$ = 0,5 ile sırasıyla azot ve hidrojen üzerinde lokalize olduğunu ölçümler göstermiştir. Çiftlenmemiş elektron ile protonlar ve azotun g değeri ve aşırı ince yapı etkileşme sabitleri EPR ve simülasyon tekniği ile belirlenmiştir.

The investigation of $\gamma$ -irradiated single crystal of 4-methyl benzylamine glyoxime by EPR and simulation technique

The electron paramagnetic resonance of $\gamma$ - irradiated single crystal of 4-Methyl Benzylamine Glyoxime(4-MBG) has been observed and analysed for different orientations of the crystals in a magnetic field. 4-MBG single crystal has been investigated at the temperatures between 100 and 400 K. The spectra were found to be temperature independent. Principal values of the g and the hyperfine splitting tensors and their direction cosines are given in the Table 1. The average values of g-factor and the hyperfine splittings were found to be g = 1,999, $a_N$ = 14G , $a_{H(NH)}$ = 13,5G and $a_{CH_2}$ = 7,5G respectively. The measurements indicate that $P_{N(NH)}$= 0=5 and $P_{H(NH)}$ = 0,5 of the unpaired electron are localized on nitrogen and hydrogen respectively. The g-values and the hyperfine coupling constants of the unpaired electron with the protons and nitrogen were determined by EPR and simulation technique.

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