| Autor: |
G. Benemanskaya, A. A. Demidenko, S. Kosianenko, Yu. Mousienko, S. Ivanov, D. M. Seliverstov, T. Shubina, V.M. Reiterov, V. Jmerik, Yu.I. Gusev, V. Ivochkin, I. A. Mironov, E. A. Garibin |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 610:335-337 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/j.nima.2009.05.104 |
| Popis: |
We suggest the use of crystal of BaF 2 as scintillator in Positron Emission Tomography (PET) with very high space resolution at the level of 1–2 mm. These crystals are prospective candidates to provide necessary cell granularity (crystal+photodetector) of 2×2 mm 2 and they possesses a very short decay time (∼0.8 ns) of the fast component in the emission spectrum. In order to detect this emission lying within deep ultra-violet (UV) spectral range with wavelengths 195–240 nm we propose to develop new type of photodetecting devices. These ones are based on wide band gap group-III nitride compounds (A 3 N) having an adjustable spectral sensitivity at wavelengths 210–360 nm and quantum efficiency 10–15%. The principal schemes of such devices based on A 3 N-nanoheterostructures emitting photoelectrons into vacuum or gaseous atmosphere and detector of photoelectrons are discussed in this paper. The photo-device with parallel-plane gas positron sensitive detector having time and position resolutions 1 ns and 500 μm, respectively, can work at counting rate up to 10 8 ph cm −2 s −1 . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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