| Autor: |
W. Fulgione, Giorgio Marchetti, P. Galeotti, Giovanni Badino, C. Castagnoli, L. Periale, Antonella Castellina, Marco Aglietta, Silvia Vernetto, O. Saavedra, Giancario Trinchero |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Nuclear Physics B - Proceedings Supplements. 28:430-434 |
| ISSN: |
0920-5632 |
| DOI: |
10.1016/0920-5632(92)90209-b |
| Popis: |
A systematic study of the low energy background radiation has been performed under several conditions in the underground experiment at Mt. Blanc laboratory. The information gathered using three different types of detectors: LSD (90 tons of liquid scintillator) with energy threshold E th > 800 KeV , Nal (5” × 5”) with E th > 220 KeV and a Radon-meter (alpha spectrometer) running at the same time, has been analyzed during long and continuous time periods. It was found that the variations in counting rate of the low energy background is due to the presence of 222Rn in the laboratory room. Three types of variations were found: 1) a correlation with the tunnel ventilation system, 2) a daily modulation and 3) a sporadic increase in the counting rate not correlated to any man-made intervention. We emphasize the importance of knowing the background and its variations in underground laboratories dedicated to low energy neutrinos and dark matter searches. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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