Vacuum UV Photoelectric Yield Spectra of BaF2and SrF2Crystals

Ejiri, Arisato; Kubota, S.; Hatano, Asuka; Yahagi, Kazuhisa

doi:10.1143/jpsj.64.1484

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…The excitation of CL starts at 18.2 eV energy corresponding to the ionisation of Ba 5p shell [4,13]. According to [14] the energy gap value of BaF 2 crystal at RT is ∼10.5 eV. The described radiative processes and the relevant energy parameters for BaF 2 are depicted on the schematic plot on the right hand panel of Fig.…”

Section: Resultsmentioning

confidence: 97%

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV

Kirm

Andrejczuk

Krzywiński

et al. 2005

phys. stat. sol. (c)

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The influence of excitation density on luminescence decay in Y 3 Al 5 O 12 :Ce and BaF 2 crystals at room temperature was investigated for the first time using pulsed free electron laser radiation in vacuum ultraviolet. Increased excitation density led to the remarkable shortening of luminescence decays with nonexponential behaviour in both crystals. The possible reasons for dramatic changes in the dynamics of electronic excitations in insulators excited by free electron laser radiation will be discussed. IntroductionThe investigation of decay kinetics of luminescence is a very sensitive technique to learn about nature of electronic excitations in solids. Using weak and moderate excitation densities (ED) the processes due to elementary excitations can be monitored. Further increase of ED leads to their mutual interactions and other cooperative effects. In theVUV energy range such investigations of wide-gap solids have been carried mostly out using weak tuneable sources, such as pulsed discharge lamps and synchrotron radiation (SR). High-power, but non-selective excitation by "white" hard X-rays [1], by particles like ion beams [2,3], and by pulsed electrons [3,4] has been used for such purposes in the past. The XUV radiation from storage ring [5] and generated by a plasma laser [6] was applied as well. However, excitation provided by above-mentioned sources populates many of the available relaxation channels thereby enormously complicating the analysis of processes. In order to investigate the dynamics of relaxation processes in solids, a pulsed excitation with variable energy and intensity in a large dynamic range would be an ideal source. In the VUV range, only free electron laser (FEL) radiation is suitable for this purpose practically fulfilling these requirements. We reporting here the first results of the luminescence investigation of crystals excited by VUV radiation from the unique FEL source [7] that was constructed by an international consortium at the HASYLAB at DESY (Hamburg, Germany).

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Section: Resultsmentioning

confidence: 97%

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV

Kirm

Andrejczuk

Krzywiński

et al. 2005

phys. stat. sol. (c)

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show abstract

“…Therefore the luminescence photon energy hn have to be located in the region of E vc À DE v hn E vc , where DE v is the valence band width and E vc is the width between top of outermost core band and that of valence band. Recent photoelectron [2] and time-resolved investigations [3,4] of BaF 2 CL emission indicated the low-energy tail with photon energy hn E vc À DE v . It was supposed that the low-energy emission is due to the lattice relaxation effect.…”

Section: Introductionmentioning

confidence: 99%

Ab initio calculation of cross-luminescence spectrum

Myasnikova

Раджабов

Mysovsky

2009

Journal of Luminescence

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Vacuum UV photoelectron dynamics in alkali earth fluorides: Yield, Auger effect, and luminescence

Ejiri

Kubota

Hatano

et al. 1996

Journal of Electron Spectroscopy and Related Phenomena

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Vacuum UV Photoelectric Yield Spectra of BaF₂and SrF₂Crystals

Cited by 8 publications

References 8 publications

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV

Ab initio calculation of cross-luminescence spectrum

Vacuum UV photoelectron dynamics in alkali earth fluorides: Yield, Auger effect, and luminescence

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Vacuum UV Photoelectric Yield Spectra of BaF2and SrF2Crystals

Cited by 8 publications

References 8 publications

Influence of excitation density on luminescence decay in Y 3 Al 5 O 12 :Ce and BaF 2 crystals excited by free electron laser radiation in VUV

Influence of excitation density on luminescence decay in Y 3 Al 5 O 12 :Ce and BaF 2 crystals excited by free electron laser radiation in VUV

Ab initio calculation of cross-luminescence spectrum

Vacuum UV photoelectron dynamics in alkali earth fluorides: Yield, Auger effect, and luminescence

Contact Info

Product

Resources

About

Vacuum UV Photoelectric Yield Spectra of BaF₂and SrF₂Crystals

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV

Influence of excitation density on luminescence decay in Y ₃ Al ₅ O ₁₂ :Ce and BaF ₂ crystals excited by free electron laser radiation in VUV