کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402634 | 1392739 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Observation of nuclear wave packets in the excited state of the F-center in alkali halides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Oscillations of nuclear wave packets (NWPs) in the excited state of the F-center in four alkali halides, potassium chloride (KCl), potassium bromide (KBr), potassium iodide (KI), and rubidium chloride (RbCl), are investigated. In KCl, the dominant mode is the LO mode near the zone center in the Brillouin zone. In KBr, the NWP oscillation consists mainly of the LO mode near the zone center and the LA modes near the singularity points in the [1Â 0Â 0] and/or [1Â 1Â 0] crystal directions. In KI, the totally symmetric local mode is dominant in the NWP oscillation. In RbCl, the LO mode near the zone boundary [1Â 0Â 0] predominantly forms the NWP oscillation. We comprehensively elucidate correspondences and differences between the present results and the resonance Raman spectra by considering the spatial extension of the electronic wave function and the perturbed phonon density of states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1435-1440
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1435-1440
نویسندگان
Takeshi Koyama, Makoto Nakajima, Tohru Suemoto,