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CONDUCTING SPECTRAL OBSERVATIONS OF NATURAL GAMMA RADIATION IN THE RANGE OF 0.1-5 MEV IN VARIOUS GEOGRAPHICAL LOCATIONS AND COMPARING THE SPECTRAстатья
- Авторы: Balabin Yu V., Germanenko A.V., Mikhalko E.A., Gvozdevsky B.B.
- Сборник: Atmosphere, ionosphere, safety
- Год издания: 2025
- Место издания: ООО "АЛГОМАТ" Kaliningrad
- Первая страница: 105
- Последняя страница: 108
- DOI: 10.59043/978-5-6042044-9-8_105
- Аннотация: We have installed differential gamma-ray spectrometers at various geographical points to monitor gamma radiation in the energy range of 0.1-5 MeV coming from the atmosphere. The locations are: Apatity (Murmansk region), Tatsinskaya (Rostov region) and Barentsburg (Spitsbergen archipelago). The spectrometers are based on a NaI(Tl) Ø75x75 mm spectrometric crystal. After assembling the instruments were checked and tested. The resolution on the 660 keV line (cesium-137) is less than 5%. The following radiation sources were used to calibrate the energy scale: potassium-40, aluminum-26 and sodium-22. The collection time of one differential spectrum was set to 30 min. The presence of constant lines of 511 keV (annihilation of positrons produced in the atmosphere by cosmic rays) and 1460 keV (potassium-40) in the spectra allows continuous monitoring of the spectrometer energy scale. The detector efficiency for different energies was calculated using the RUSCOSMICS software package. The spectrometers have a lead shield with a wall thickness of 20-50 mm to exclude radiation from surrounding objects and soil. The field of view of the detectors is a cone of ~90 degrees directed to the zenith. The devices are placed in thermostabilized boxes in buildings with light roofs. The similarity of the spectrometers and the conditions of their placement allows to compare the parameters of the obtained spectra, and to identify common characteristics for such geographically distant points.
- Добавил в систему: Германенко Алексей Владимирович