| Autor: |
Coron Noël, Cuesta Clara, García Eduardo, Ginestra Carlos, Girard Thomas A., de Marcillac Pierre, Martínez María, Ortigoza Ysrael, Ortiz de Solórzano Alfonso, Pobes Carlos, Puimedón Jorge, Redon Thierry, Sarsa María Luisa, Torres Lidia, Valko Pavol, Villar José Ángel |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 65, p 02001 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/20136502001 |
| Popis: |
Despite that it is widely used as a scintillator at room temperature, the hygroscopicity of NaI complicates its handling and limits its application for many purposes, for example as a cryogenic detector. To overcome this problem we study coating materials that can act as humidity barriers, in particular parylene, a polymer that can be deposited in very radiopure, thin and conformal layers. In this work, several NaI(Tl) samples coated with 2-5 µm parylene-C were tested at low temperature. Luminescence spectra under X-ray excitation are presented at several temperatures as well as the light output vs temperature at 1.5-300 K. Several thermoluminescence peaks were observed at around 60, 95 and 150 K during warm up to room temperature. The mechanical resistance of the coating under thermal cycles was also investigated, and we observed a degradation of the optical appearance and the light output after cooling down to about 100 mK, which compromises the reusability of the samples. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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