GAMMA RAY LINE RADIATION

1994 ◽  
pp. 32-68 ◽  
Author(s):  
REUVEN RAMATY ◽  
RICHARD E. LINGENFELTER
Keyword(s):  
Gamma Ray ◽  
Line Radiation

scholarly journals Gamma-ray signatures from pair cascades in recombination-line radiation fields

2021 ◽  
Author(s):  
Christoph Wendel ◽  
Josefa Becerra Gonzalez ◽  
Amit Shukla ◽  
David Paneque ◽  
Karl Mannheim
Keyword(s):  
Gamma Ray ◽  
Recombination Line ◽  
Line Radiation ◽  
Radiation Fields

scholarly journals Annihilation Radiation and Gamma-Ray Continuum from the Galactic Center Region

1989 ◽  
Vol 136 ◽  
pp. 587-605 ◽  
Author(s):  
Richard E. Lingenfelter ◽  
Reuven Ramaty
Keyword(s):  
Gamma Ray ◽  
Galactic Center ◽  
Line Emission ◽  
Continuum Emission ◽  
Annihilation Radiation ◽  
Line Radiation ◽  
Annihilation Line ◽  
Compact Source ◽  
Electron Positron Annihilation ◽  
Electron Positron

Observations of the time-dependent, electron-positron annihilation line radiation and gamma-ray continuum emission from the region of the Galactic Center show that there are two components to the annihilation line emission: a variable, compact source at or near the Galactic Center, and a steady, diffuse interstellar distribution. We suggest that the annihilating positrons in the compact source, observed from 1977 through 1979, result from photon-photon pair production, most likely around an accreting black hole, and that the annihilating, interstellar positrons result from the decay of radionuclei produced by thermonuclear burning in supernovae.

On the possible gamma-ray source in Cygnus

1967 ◽  
Vol 31 ◽  
pp. 469-471
Author(s):  
J. G. Duthie ◽  
M. P. Savedoff ◽  
R. Cobb
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Right Ascension

A source of gamma rays has been found at right ascension 20h15m, declination +35°, with an uncertainty of 6° in each coordinate. Its flux is (1·5 ± 0·8) x 10-4photons cm-2sec-1at 100 MeV. Possible identifications are reviewed, but no conclusion is reached. The mechanism producing the radiation is also uncertain.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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