The role of iron ions in YAG and YAP

Kvapil, Jiří; Kubelka, J.; Autrata, Rudolf

doi:10.1002/crat.2170180120

Cited by 37 publications

(13 citation statements)

References 22 publications

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“…In the former case, mainly iron [92] and titanium ions in YAP and furthermore Yb ions in (Lu-Y)AP were evidenced by ESR. In the latter case molybdenum ions were evidenced by ESR [93] coming from the crucible used for the growth of bulk crystals.…”

mentioning

confidence: 92%

Complex oxide scintillators: Material defects and scintillation performance

Nikl¹,

Laguta

Vedda

2008

Physica Status Solidi (b)

195

106

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An overview of recognized structural defects, impurities and related trapping levels and their role in the scintillation mechanism is provided and discussed in single crystal materials belonging to tungstate, Ce‐ or Pr‐doped aluminum perovskite, garnet and finally to Ce‐doped silicate scintillators. New achievements and open problems in deeper understanding of electron and hole self‐trapping phenomena and of the nature of defects in the crystal structure and their ability to localize migrating charge carriers are indicated. Fast optical ceramics and nanocomposite materials are pointed out as possible future advanced scintillators. Such novel technologies can in principle explore materials which are not available in the bulk single crystal form, but their figure‐of‐merit is dramatically dependent on the surface‐interface defect states and related trapping and nonradiative recombination phenomena. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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mentioning

confidence: 92%

Complex oxide scintillators: Material defects and scintillation performance

Nikl¹,

Laguta

Vedda

2008

Physica Status Solidi (b)

195

106

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“…YAP monocrystals are grown by the Czochralski method [7], [8]. The optimum light yields result from the addition of 0.1 to 0.5 wt % CeO 2 [7] without changing the decay time.…”

Section: Introductionmentioning

confidence: 99%

X-ray detection with a scintillating YAP-window hybrid photomultiplier tube

D’Ambrosio

Notaristefani

Leutz

et al. 2000

IEEE Trans. Nucl. Sci.

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Abstract-A YAP(YAlO 3 : Ce)-scintillating window, coated on its inner surface with an S20-photocathode, seals a cross-focusing hybrid photomultiplier tube (HPMT) equipped with a small p-i-n anode of 2-mm diameter. This new radiation detector separates X-ray lines down to about 2-keV peak energy from the HPMT noise. Its detection efficiency for high gamma energies depends on the YAP-window thickness and amounts to about 18% attenuation at 400-keV energy in the present version. Competitive radiation detectors like silicon photodiodes and silicon drift chambers are discussed and compared to our prototype, with particular attention given to their energy resolution and noise performance, which limits their active area considerably.

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“…The Fe 2+ ions are considered to be responsible for the intensive absorption at 43000 cm ± ±1 and the weak one at 32000 cm ± ±1 . During the irradiation the reactions of O 2± ± + hn 3 O ± ± + e ± ± and Fe 3+ + e + 3 Fe 2+ take place that result in the appearance of the AA maxima of 42000 and 33000 cm ± ±1 [62,63].…”

Section: Yttrium Aluminium Perovskitementioning

confidence: 99%

“…Iron ions are known to be the most common impurity in YAP crystals and they can exist in the valence states Fe 2+ and Fe 3+ [62]. The Fe 2+ ions are considered to be responsible for the intensive absorption at 43000 cm ± ±1 and the weak one at 32000 cm ± ±1 .…”

Section: Yttrium Aluminium Perovskitementioning

confidence: 99%