GRBs are immensely energetic explosions that have been observed in distant galaxies. They are the most energetic and luminous electromagnetic events since the Big Bang. The first GRB was discovered in 1967. Since 2019, three GRBs with high energy emissions have been detected and photons up to o...
1.A photon of electromagnetic radiation of very short wavelength, less than about 0.01 nanometer, and very high energy, greater than about 100,000 electron volts. Gamma rays are emitted in the decay of certain radioactive nuclei and in electron-positron annihilation. ...
For maximum and average γ-ray data,there are correlations for the 22 BL Lac objects.In addition,there is a correlation between the γ-ray and radio spectral index.According to our analysis,we have proposed that the γ-rays are likely from the synchrotron self-compton process in this case....
thunderstorms can be so large that bright bursts of these x-rays are observed from space, 600 km above the storms, as terrestrial gamma-ray flashes (... JR Dwyer - Springer Netherlands 被引量: 13发表: 2009年 BALLOON-BASED HIGH-TIME RESOLUTION MEASUREMENTS OF X-RAY EMISSIONS FROM LIGHTNING ...
we find that γ-ray flux densities correlate better with the near-IR flux densities than those with the optical or x-ray flux densities.There is no correlation between γ-ray and radio flux densities.Possible constraints on the γ-ray emission mechanism are discussed.We suggest that the main ...
2.2 The Physics of TGFs and How They Are Related to Lightning Another outstanding question is to understand how TGFs are produced. We know that X- and γ-rays in a TGF are produced through the bremsstrahlung process by high energy electrons interacting with the atmosphere, but there is no ...
Thunderstorms emit fluxes of gamma rays known as gamma-ray glows1,2, sporadically observed by aircraft1,3,4,5,6,7, balloons8,9,10,11 and from the ground12,13,14,15,16,17,18. Observations report increased gamma-ray emissions by tens of percent up to two orders of magnitude above the...
The X-ray and gamma-ray emissions expected from SN 1987A have been calculated, taking into account mixing of material in the ejecta. Nuclear gamma rays emi... T Ebisuzaki,N Shibazaki - 《Astrophysical Journal》 被引量: 86发表: 1988年 ...
GRBs are immensely energetic explosions that have been observed in distant galaxies. They are the most energetic and luminous electromagnetic events since the Big Bang. The first GRB was discovered in 1967. Since 2019, three GRBs with high energy emissions have been detected and photons up to ...
Imaging of nuclear gamma-ray lines in the 1–10 MeV range is far from being established in both medical and physical applications. In proton therapy, 4.4 MeV gamma rays are emitted from the excited nucleus of either 12C* or 11B* and are considered