Thermally and Optically Stimulated Luminescence of AlN-Y2O3 Ceramics after Ionising Irradiation

Trinkler, L.; Bos, A.J.J.; Winkelman, A.J.M.; Christensen, Poul; Larsen, N. A.; Bērziņa, B.

doi:10.1093/oxfordjournals.rpd.a032718

Cited by 22 publications

(19 citation statements)

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“…Irradiation of AlN with ultraviolet (UV) light or X-rays, respectively, results not only in luminescence, but also in storage of radiation energy. The stored energy can be released either by thermal [7 to 10] or by optical stimulation [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Oxygen-Related Luminescence Centres in AlN Ceramics

Schweizer

Rogulis

Spaeth

et al. 2000

phys. stat. sol. (b)

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The structure of oxygen‐related luminescence centres in nominally undoped and Y2O3 doped AlN ceramics was investigated by electron paramagnetic resonance (EPR), electron nuclear double resonance (ENDOR) and optically‐detected EPR. The photoluminescence‐detected EPR lines having g‐values of 1.990 and 2.008 were assigned to a recombination between neighbouring donor and acceptor pairs. The two EPR lines at g = 1.987 and 2.003 detected via the recombination luminescence in the afterglow are thought to be due to a recombination between the same, but distant donor and acceptor pairs. The donor was previously speculated to be an electron trapped on an oxygen impurity which substitutes for a nitrogen on a regular lattice site. The defect structure of the acceptor was established by ENDOR to be a hole trapped on an ON–vAl complex (ON oxygen on a regular N site, vAl Al vacancy). The measured superhyperfine interaction is caused by two equivalent 27Al nuclei both with a = ±27.0 MHz.

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Section: Introductionmentioning

confidence: 99%

Investigation of Oxygen-Related Luminescence Centres in AlN Ceramics

Schweizer

Rogulis

Spaeth

et al. 2000

phys. stat. sol. (b)

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“…The same speculations concern also AlN ceramics with only difference that the most efficient stimulation light wavelengths are located around 450-550 nm. Fading of OSL and TL signal in irradiated AlN ceramics was estimated as rather high [7] -up to 50 % of initial intensity lost in 24 hours during storage at RT in darkness. Contrary to AlN, no apparent OSL or TL signal fading was observed for diamond materials when storage conditions were appropriate.…”

Section: Discussionmentioning

confidence: 96%

Potential application of some wide band gap materials for UV dosimetry

Benabdesselam

Iacconi

Trinkler

et al. 2005

phys. stat. sol. (c)

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Properties of some wide band gap materials-natural and CVD diamonds-have been studied for their potential application in UV dosimetry, using methods of optically stimulated luminescence and thermoluminescence. The observed properties are compared with those of the previously studied AlN ceramics. From the OSL excitation spectra, it follows that spectral sensitivity of the studied materials falls mainly into the UVC range, OSL and TL emission spectra are located within the visible light region, thus suitable for usual photodetectors. OSL stimulation spectra of the studied materials have a continuous character and are located in a broad visible/near infrared spectral region implying that the stored signal is subjected to the optical bleaching in ambient light conditions. Dosimetric TL peaks of diamond materials are located in the 280-330 °C range, suitable for detection. No thermal fading of the stored OSL or TL signal at RT was observed in contrast to AlN, which is characterised by a high fading rate.

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“…In this paper, we will pay attention mostly to properties of luminescence produced by UV light irradiation, as well as stop briefly on luminescence properties produced by ionizing radiation, which potentially can be used in dosimetry. The experimental results mentioned in this chapter are described in detail in our previous works [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Methodsmentioning

confidence: 99%

“…Different aspects of TL in AlN ceramics were studied in our previous papers [27,28,30,31,[34][35][36][37][38]. Studying peculiarities of TL after irradiation by the deuterium lamp with the wavelengths corresponding to excitation of the UV and Blue bands (243 and 298 nm, correspondingly), it was found that for both excitations the UV-Blue TL emission bands are shifted to the longer wavelengths compared to the corresponding PL emission bands -that is, the red shift is observed.…”

Section: Thermoluminescencementioning

confidence: 99%