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An EPR and ENDOR study of quartet state nitrogen atoms trapped in irradiated NaN3 powder
Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden.
Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden.
Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Chemical Physics .
2001 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 3, no 19, 4444-4448 p.Article in journal (Refereed) Published
Abstract [en]

The nature of quartet state nitrogen atoms formed in gamma -irradiated NaN3 powder was investigated by EPR, ENDOR and ENDOR-induced EPR (EIE). The ENDOR spectrum observed at 110 K clearly showed two sets of N-14 signal pairs centered at a(N)/2 (half the N-14-hyperfine splitting) and at 3a(N)/2, strongly suggesting the existence of quartet state N-14 atoms (S-4(3/2)). At 160 K, the EPR spectrum exhibited a clear fine structure. accompanied by a hyperfine coupling due to N-14. The zero-field splitting, D, gradually increased with decreasing temperature from 170 to 40 K, and then became nearly constant. The temperature dependence of D was explained in terms of a local lattice vibration coupled with spin states of N-14 atoms. At below 95 K, a new fine structure with larger D was observed. The observed two D-values were attributed to 14N atoms located at two different interstitial sites in the monoclinic NaN3 structure.

Place, publisher, year, edition, pages
2001. Vol. 3, no 19, 4444-4448 p.
National Category
Engineering and Technology
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URN: urn:nbn:se:liu:diva-49113OAI: oai:DiVA.org:liu-49113DiVA: diva2:270009
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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