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Non-Contact Luminescence Lifetime Microthermometry using Scintillation Sensors

100%

Mykhaylyk V., Kraus H., Wagner A.

Acta Physica Polonica A

2018

vol. 133

issue 4

1108-1111

The paper describes an original technique for non-contact in situ monitoring of the temperature developed for experiments in a vacuum environment at the tender X-ray beamline I23 of the Diamond Light Source. The sample temperature is established by determining the luminescence decay constant of a Bi₄Ge₃O₁₂ (BGO) scintillation sensor. BGO is ideally suited for a temperature range of 30 K to 130 K, in which its decay constant shows a strong temperature dependence. The principle of the method, system design and application examples are discussed and the performance and potential of the technique is assessed.

Research and Development of ZnBO_{4} (B = W, Mo) Crystal Scintillators for Dark Matter and Double Beta Decay Searching

64%

Dubovik A., Vostretsov Y. Y., Grinyov B., Danevich F., Kraus H., Nagornaya L., Mikhailik V., Tupitsyna I.

issue 1

15-19

Oxide crystal scintillators play a considerable role in fundamental and applied researches. However, working out of new generation of high-sensitivity equipment and new methods of research puts higher requirements. The ZnBO_{4} (B = W, Mo) crystals were grown from charge in platinum crucibles with high frequency heating, using the Czochralski method. The raw powder with optimum composition was prepared by solid phase high temperature synthesis using ZnO and BO_{3} (B = W, Mo) with 4-5N purity. Single crystals with sizes up to ∅ 50 × 100 mm were grown and scintillation elements of various sizes and shapes (cylinders, rectangular and hexahedron prisms) were produced. High spectrometric characteristics were obtained for ZnWO_{4}:R = 8-10% under excitation by ^{137}Cs (E_{γ}=662 keV), low radiation background (less than 0.2 mBq/kg) and low afterglow (0.002%, 20 ms after excitation). The obtained results demonstrate good prospects for ZnWO_{4} and ZnMoO_{4} crystal scintillators for application in low-count rate experiments, searching for double beta decay processes, interaction with dark matter particles, and also studies of rare decay processes. The material has also a good potential for application in modern tomography, scintillation bolometers and for other major researches using scintillators.

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2 Acta Physica Polonica A

1 2018

1 2010

2 Kraus H.

1 Danevich F.

1 Dubovik A.

1 Grinyov B.

1 Mikhailik V.

1 Mykhaylyk V.

1 Nagornaya L.

1 Tupitsyna I.

1 Vostretsov Y. Y.

1 Wagner A.

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Non-Contact Luminescence Lifetime Microthermometry using Scintillation Sensors

Research and Development of ZnBO_{4} (B = W, Mo) Crystal Scintillators for Dark Matter and Double Beta Decay Searching