A new fully integrated X-ray irradiator system for dosimetric research

Richter, Daniel; Mittelstraß, Dirk; Kreutzer, Sebastian; Pintaske, R.; Dornich, K.; Fuchs, Markus

doi:10.1016/j.apradiso.2016.03.022

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…In contrast to the original publication we do not use TL measurements to interpret the effect of UV bleaching but UV-RF signals instead, enabling a more direct analysis. This is possible because in the last few years the knowledge about signal dynamics of UV-RF increased and this measurement technique is widely available in modern luminescence readers [14,24].…”

Section: Discussionmentioning

confidence: 99%

“…The reader is equipped with a 90 Sr/ 90 Y β-source (∼3.6 Gy min −1 ), calibrated for coarse grain quartz on stainless steel cups. The β-source is specifically designed for RF measurements [14]. Luminescence was detected through a Chroma BP 365/50 EX interference filter in front of a Hamamatsu H7360-02 photomultiplier tube allowing for a detection of the UV-RF signal between 315 nm and 415 nm (3.94 eV and 2.99 eV, respectively; see figure 1).…”

Section: Measurement Conditionsmentioning

confidence: 99%

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Making the invisible visible: observing the UV-reversal effect in quartz using radiofluorescence

Friedrich¹,

Kreutzer²,

Schmidt³

2018

J. Phys. D: Appl. Phys.

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The pre-dose effect is one of the most well-known phenomena in quartz luminescence. It refers to an increase in dose sensitivity subsequent to radiation pre-exposure and annealing. A theoretical description of this phenomenon exists since the 1970s and is widely used in recent luminescence models. However, also the opposite effect has been described, the less known ‘UV-reversal’ effect which reduces the luminescence sensitivity due to illuminating the sample with far UV light. Both effects were detected with thermoluminescence (TL) following a small test dose and observing the effect indirectly using the response of the 110 °C peak. We here present a more direct measurement of both phenomena via UV-radiofluorescence (UV-RF), which is the luminescence emitted during irradiation. Therefore, the need of a TL measurement is obsolete. Furthermore, we were able to calculate a time rate of eviction of holes from the luminescence centre and implement this value into existing models to obtain a more comprehensive description of quartz luminescence. Numerical simulations are in good agreement with experimental data.

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Section: Discussionmentioning

confidence: 99%

Section: Measurement Conditionsmentioning

confidence: 99%

Making the invisible visible: observing the UV-reversal effect in quartz using radiofluorescence

Friedrich¹,

Kreutzer²,

Schmidt³

2018

J. Phys. D: Appl. Phys.

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“…Recent developments of that reader are described by Thomson et al [54] and Lapp et al [55,56]. Another luminescence measurement system—lexsyg—which can be used in fundamental material research, is developed by Freiberg Instruments [57,58,59]. …”

Section: Instrumentationmentioning

confidence: 99%

Thermoluminescence as a Research Tool to Investigate Luminescence Mechanisms

Bos

2017

Materials

219

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Thermally stimulated luminescence (TSL) is known as a technique used in radiation dosimetry and dating. However, since the luminescence is very sensitive to the defects in a solid, it can also be used in material research. In this review, it is shown how TSL can be used as a research tool to investigate luminescent characteristics and underlying luminescent mechanisms. First, some basic characteristics and a theoretical background of the phenomenon are given. Next, methods and difficulties in extracting trapping parameters are addressed. Then, the instrumentation needed to measure the luminescence, both as a function of temperature and wavelength, is described. Finally, a series of very diverse examples is given to illustrate how TSL has been used in the determination of energy levels of defects, in the research of persistent luminescence phosphors, and in phenomena like band gap engineering, tunnelling, photosynthesis, and thermal quenching. It is concluded that in the field of luminescence spectroscopy, thermally stimulated luminescence has proven to be an experimental technique with unique properties to study defects in solids.

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“…However, calibrated gamma sources are not commonly available. X-ray sources have been used in ESR dating (Grün et al, 2012;Oppermann and Tsukamoto, 2015;Fang and Grün, 2020), as well as in luminescence dating (Hashimoto et al, 2002;Andersen et al, 2003;Thomsen et al, 2006;Richter et al, 2016).…”

Section: Introductionmentioning

confidence: 99%