scholarly journals Peculiarities of soft gamma-radiation variations in the atmosphere

2019 ◽  
Vol 127 ◽  
pp. 01007
Author(s):  
Aleksei Germanenko ◽  
Evgenya Mikhalko ◽  
Evgeny Maurchev ◽  
Boris Gvozdevsky ◽  
Igor Yankovsky
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Radioactive Contamination ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Main Components

Soft gamma-radiation (20-400 keV) arriving from the atmosphere is being monitored by Polar Geophysical Institute (PGI), Apatity, Russia, at several stations located between Spitsbergen and the Causases. In Apatity and Spitsbergen, it has been carried out for ten years already. Detectors of the same type with output integral channels > 20 keV and > 100 keV are used. All the stations record increases in the gammaradiation flux, which are sometimes as high as 100%. These increases occur all the year round, in winter and summer and are recorded at all the stations. A great database on these increases has been used to analyze their characteristics. The detector used in Apatity, is integrated into a complex set carrying out monitoring over the main components of the secondary cosmic rays. According to the earlier experiments, no radioactive contamination has been found in precipitation. The integral and differential data have been analyzed to reveal the peculiarities of the phenomenon studied.

scholarly journals Nature of gamma radiation variations during atmospheric precipitations

2016 ◽  
Vol 2 (1) ◽  
pp. 78-88 ◽  
Author(s):  
Алексей Германенко ◽  
Aleksey Germanenko ◽  
Юрий Балабин ◽  
Yuriy Balabin ◽  
Борис Гвоздевский ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Radiation Spectrum ◽  
Geophysical Institute ◽  
Satisfactory Description ◽  
Polar Geophysical Institute ◽  
Artificial Radionuclides ◽  
Characteristic Lines ◽  
Series Of Experiments ◽  
Precipitation Events

The Polar Geophysical Institute has developed a complex facility for continuously monitoring various components of secondary cosmic rays. Gamma radiation during precipitation events has been found to increase the year round regardless of the season. A series of experiments has revealed that there is no precipitation pollution by any natural or artificial radionuclides. Radiation spectrum does not have any characteristic lines of elements. We propose a mechanism providing a satisfactory description for this phenomenon.

scholarly journals Nature of gamma radiation variations during atmospheric precipitations

2016 ◽  
Vol 2 (1) ◽  
pp. 56-63
Author(s):  
Алексей Германенко ◽  
Aleksey Germanenko ◽  
Юрий Балабин ◽  
Yuriy Balabin ◽  
Борис Гвоздевский ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Continuous Monitoring ◽  
Radiation Spectrum ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Characteristic Lines ◽  
Series Of Experiments

The complex facility for continuous monitoring of various components of secondary cosmic rays was developed in the Polar Geophysical Institute. Increases in gamma-radiation during precipitation are found to occur during the year regardless of a season. As shown in a series of experiments, there is no precipitation pollution by any radionuclides of natural or artificial origins. Radiation spectrum does not have any characteristic lines of elements. The mechanism which satisfactorily describes this phenomenon was proposed.

scholarly journals Common features of gamma-radiation increase at different stations from Arctic to mid-latitudes

2018 ◽  
Vol 62 ◽  
pp. 01003
Author(s):  
Yury Balabin ◽  
Boris Gvozdevsky ◽  
Alexey Germanenko ◽  
Evgeny Mikhalko ◽  
Evgeny Maurchev ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Complex Analysis ◽  
Lower Atmosphere ◽  
Near Surface ◽  
Polar Geophysical Institute ◽  
Background Gamma Radiation ◽  
First Time ◽  
Electromagnetic Component ◽  
Soft Radiation

Background gamma-radiation (20-400 KeV) monitoring in the near-surface layer of the atmosphere has been carried out by Polar Geophysical Institute (PGI) for many years. This radiation originates in the atmosphere by cosmic rays. In propagation through the atmosphere, the flux of soft radiation experiences variations which are induced by various processes in the atmosphere. A unique and extensive database has been collected on the level of the soft gamma-radiation occurring in 2009-2017. Measurements are made with the help of similar detectors developed at PGI. All the stations observe the event which was for the first time discovered by the authors: gamma-background increase at precipitation. These increases are not related to any radionuclides in precipitation. Increases are observed only in the electromagnetic component originating in the atmosphere from cosmic rays. The complex analysis of the data collected has shown that the characteristics of the events (such as amplitude, duration, the count-rate, a total energy) have clear differences through the seasons at each station. The analysis of the events shows that variations of the background gamma-radiation can be used to study some atmospheric processes in the lower atmosphere.

Production ofπMesons and Gamma Radiation in the Galaxy by Cosmic Rays

1963 ◽  
Vol 131 (6) ◽  
pp. 2684-2691 ◽  
Author(s):  
J. B. Pollack ◽  
G. G. Fazio
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
The Galaxy

Mass Treatment of Flooded Archival Materials by Gamma Radiation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Matteo Montanari ◽  
Sara Pipponzi ◽  
Pietro Livi ◽  
Antonio Prodi
Keyword(s):  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Culture Method ◽  
Test Species ◽  
Atp Assay ◽  
Recovery Processes ◽  
Mycelia Growth ◽  
Thermal Drying ◽  
Radiation Treatments ◽  
Main Components

Abstract This work describes mass recovery processes of flooded archival materials at industrial scale. The presence of fungi on paper represents a threat to the integrity of the document because they degrade cellulose, one of the main components of paper. Gamma radiation treatments are investigated as mass disinfection agents for their high penetrating power, speed of treatment, and absence of risk due to chemical residuals. We compared two different recovery processes: thermal drying followed by gamma irradiation and gamma irradiation followed by thermal drying. Both these processes were conducted simultaneously on naturally contaminated archival items and on paper specimens artificially contaminated with species test. Efficacy was assessed by culture method and ATP assay, right after the treatments and after four years of storage at room temperature. Coupling gamma irradiation with a drying step with dry heat at 55–60 °C reduces the fungal loads on natural items up to levels close to the detection limits, and the reduction is maintained after four years. On artificial specimens, spore germination is completely inhibited, mycelia growth is also highly affected, but the melanised test species appear to be more resistant. A synergistic effect between gamma irradiation, water content, and thermal drying is highlighted in this paper.

scholarly journals Results of microwave monitoring of middle atmosphereozone in polar latitudes for two winter seasons 2017-2018 and 2018-2019.

2020 ◽  
Author(s):  
Y.Y. Kulikov ◽  
◽  
A.F. Andriyanov ◽  
V.G. Ryskin ◽  
V.M. Demkin ◽  
...  
Keyword(s):  
Middle Atmosphere ◽  
Continuous Series ◽  
Vertical Profiles ◽  
Stratospheric Warming ◽  
Geophysical Institute ◽  
Sudden Stratospheric Warming ◽  
Polar Geophysical Institute ◽  
Mesospheric Ozone ◽  
Dynamic Components ◽  
Microwave Data

We present data continuous series of microwave observations of the middle atmosphere in winters 2017-2018, 2018-2019 and 2019-2020. In each of these winters sudden stratospheric warming were marked.Measurements were carried out with the help of mobile ozonemeter (observation frequency 110836.04 MHz), which was established at Polar Geophysical Institute in Apatity (67N, 33E). The parameters of the device allow to measure a spectrum of the ozone emission line for time about 15 min a precision of 2%. On the measured spectra were appreciated of ozone vertical profiles in the layer of 22 60 km which were compared to satellite data MLS/Aura and with the data of ozonesonde at station Sodankyla (67N, 27E). The microwave data on the behavior of mesospheric ozone (altitude 60 km) indicate the presence of bothphotochemical and dynamic components in its changes.

scholarly journals Estimation of effective radiation dose for households living in rare earth mines in Nam Xe, Lai Chau province

2021 ◽  
Vol 8 (2) ◽  
pp. 27-35
Author(s):  
Van Dung Nguyen ◽  
Dinh Thuan Dao ◽  
Hao Quang Nguyen
Keyword(s):  
Rare Earth ◽  
Radiation Dose ◽  
Adverse Effects ◽  
United Nations ◽  
Gamma Radiation ◽  
Radiation Doses ◽  
Average Dose ◽  
Effective Radiation Dose ◽  
Main Components ◽  
Effective Radiation

According to the United Nations Scientific Council on the Effects of Atomic Radiation(UNSCEAR), the global average dose level for the community is 2.4mSv/year. People living in the areas with high levels of radiation will cause adverse effects on their health. There are two main components that cause the dose of radiation, mainly due to the inhalation of radon and the extra dose of gamma radiation. The paper presents the results of assessment of natural effective radiation doses on the basis of the projected outpatient dosimetry in 70 households living in Mau and Mo village of Nam Xe, Phong Tho distrist, Lai Chau province.

Training to Respond to Radiation Emergencies Using Methods and Tools for Modeling Radioactive Contamination of the Area

ANRI ◽  
2020 ◽  
Vol 0 (4) ◽  
pp. 71-75
Author(s):  
Damian Komar ◽  
Valery Kozhemyakin ◽  
Evgeniy Bistrov ◽  
Evgeniy Konovalov ◽  
Sergey Pribilev
Keyword(s):  
Gamma Radiation ◽  
Radioactive Contamination ◽  
Point Sources ◽  
Hardware Complex ◽  
Software And Hardware

The article presents the advantages of using the SimRad software and hardware complex for teaching how to respond to nuclear and radiation emergencies. Complex allows to simulate point sources of gamma radiation and radioactive contamination of the area. Its functions and main features are described.

Sign in / Sign up

Export Citation Format

Share Document