نتایج جستجو برای: gamma ray

تعداد نتایج: 405822  

ژورنال: سنجش و ایمنی پرتو 2020
Davoodmaghami, Tayebeh, Mohebian, Monire, Pourimani, Reza,

In this study, 34 soil samples were collected from the east of the Shazand power plant to the  Arak city, with a length of 25 km. The specific activities of radionuclides of 226Ra, 232Th, 40K, and 137Cs were determined using gamma-ray spectrometry method. Gamma-ray spectra registered to employ high purity germanium (HPGe) detector with 30% relative efficiency. Specific activities of correspondi...

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Journal: :Physics Procedia 2015

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1999
W. Thomas Vestrand

We present x-ray observations of the nearby BL Lac PKS 2155-304 taken when it was undergoing a GeV/TeV gamma-ray outburst. During the outburst we measured xray fluxes in the 2-10 keV band that are the largest ever observed for PKS 2155-304. Comparison of these November 1997 measurements and other x-ray observations made contemporaneously with GeV or TeV gamma-ray observations indicate that x-ra...

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Journal: :The Astrophysical Journal 2005

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Journal: :The Astrophysical Journal 2016

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Journal: :Astronomy & Astrophysics 2013

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Journal: :EPJ Web of Conferences 2019

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Journal: :Advances in Space Research 2022

The currently developing space-based gamma-ray telescope GAMMA-400 will measure the and electron + positron fluxes using main top-down aperture in energy range from ? 20 MeV to several TeV a highly elliptic orbit (without shading by Earth outside radiation belts) continuously for long time. instrument provide fundamentally new data on discrete sources, bursts (GRBs), sources propagation of Gala...

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Journal: :Journal of Physics: Conference Series 2012

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Journal: :Research in Astronomy and Astrophysics 2009

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