Results 181 to 190 of about 2,261,840 (225)
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Space Science Reviews, 1983
Recent gamma-ray line observations and their interpretations are reviewed and prospects for future line detections are discussed.
R. Ramaty, R.E. Lingenfelter
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Recent gamma-ray line observations and their interpretations are reviewed and prospects for future line detections are discussed.
R. Ramaty, R.E. Lingenfelter
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Physics Bulletin, 1978
Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
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Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1988
Abstract The observational status of gamma-ray astronomy in the TeV energy range is rapidly changing and is reviewed (1987) with emphasis on the limitations of the present observations. It is apparent that gamma-ray detection techniques must be improved and some methods by which this can be achieved are outlined.
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Abstract The observational status of gamma-ray astronomy in the TeV energy range is rapidly changing and is reviewed (1987) with emphasis on the limitations of the present observations. It is apparent that gamma-ray detection techniques must be improved and some methods by which this can be achieved are outlined.
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European Journal of Physics, 1988
The study of celestial gamma -rays represents the opening of one of the last observational windows in high-energy astrophysics. Gamma rays provide a unique method for observing the energetic processes which exist within many of the most unusual celestial objects.
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The study of celestial gamma -rays represents the opening of one of the last observational windows in high-energy astrophysics. Gamma rays provide a unique method for observing the energetic processes which exist within many of the most unusual celestial objects.
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IEEE Transactions on Nuclear Science, 1975
Recent observations have marked the transition of gamma ray astronomy from a discovery phase to an exploratory one. This has been the result of the development of a number of very sophisticated sensitive telescopes and the opportunity to place them on space platforms.
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Recent observations have marked the transition of gamma ray astronomy from a discovery phase to an exploratory one. This has been the result of the development of a number of very sophisticated sensitive telescopes and the opportunity to place them on space platforms.
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Il Nuovo Cimento, 1958
Photons in the visible range form the basis of astronomy. They move in straight lines, which preserves source information, but they arise only very indirectly from nuclear or high-energy processes. Cosmic-ray particles, on the other hand, arise directly from high-energy processes in astronomical objects of various classes, but carry no information ...
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Photons in the visible range form the basis of astronomy. They move in straight lines, which preserves source information, but they arise only very indirectly from nuclear or high-energy processes. Cosmic-ray particles, on the other hand, arise directly from high-energy processes in astronomical objects of various classes, but carry no information ...
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Contemporary Physics, 1992
Abstract Gamma-rays are located in the hard electromagnetic wave band. The range of measured energies is restricted to the interval between about 105 eV and 1016 eV (the latter is the highest energy of detected particles which are supposed to be gamma-ray photons). Gamma-ray astronomy is relatively young—approximately 25 years old.
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Abstract Gamma-rays are located in the hard electromagnetic wave band. The range of measured energies is restricted to the interval between about 105 eV and 1016 eV (the latter is the highest energy of detected particles which are supposed to be gamma-ray photons). Gamma-ray astronomy is relatively young—approximately 25 years old.
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Canadian Journal of Physics, 1968
A brief review is presented of the predicted intensities of gamma radiation from celestial objects. This is followed by a discussion of the use of a balloon-borne spark chamber to measure these intensities and to study the background gamma-ray intensity at 2.8 atmospheric pressure over Texas.
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A brief review is presented of the predicted intensities of gamma radiation from celestial objects. This is followed by a discussion of the use of a balloon-borne spark chamber to measure these intensities and to study the background gamma-ray intensity at 2.8 atmospheric pressure over Texas.
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AIP Conference Proceedings, 2000
This paper summarizes recent results in X-ray and γ-ray astronomy including measurements of galactic and extragalactic sources from 0.1 keV to 20 GeV from space, measurements of γ-rays at energies above 70 GeV from the ground as well as theoretical models for the emission of γ-rays and X-rays in galactic and extragalactic sources.
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This paper summarizes recent results in X-ray and γ-ray astronomy including measurements of galactic and extragalactic sources from 0.1 keV to 20 GeV from space, measurements of γ-rays at energies above 70 GeV from the ground as well as theoretical models for the emission of γ-rays and X-rays in galactic and extragalactic sources.
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Physics Today, 1998
Our understanding of the gamma-ray sky is being revolutionized. Seven years ago, gamma-ray astronomers knew of only a scattering of very bright sources. Now, thanks to two international observatories, the gamma-ray sky appears to be teeming with variety—unstable sources that change violently on short time scales, steady sources that glow radioactively ...
Neil Gehrels, Jacques Paul
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Our understanding of the gamma-ray sky is being revolutionized. Seven years ago, gamma-ray astronomers knew of only a scattering of very bright sources. Now, thanks to two international observatories, the gamma-ray sky appears to be teeming with variety—unstable sources that change violently on short time scales, steady sources that glow radioactively ...
Neil Gehrels, Jacques Paul
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