Nuclear structure and galactic gamma-ray activity
نویسندگان
چکیده
منابع مشابه
Nuclear Structure and Galactic γ-Ray Activity
The observation of galactic γ lines following the decay of radioactive nuclei provides a direct link between nuclear physics experiments in earth-based laboratories and astrophysical observations with space-based observatories. Two examples are presented to illustrate this interplay: the measurement of the lifetime of (44)Ti to allow an improved determination of the (44)Ti mass of the supernova...
متن کاملGalactic Arm Structure and Gamma Ray Astronomy
In an attempt to explain the observed unexpectedly high energy gamma radiation over a broad region of the galactic plane in the general direction of the galactic center, a model is proposed wherein the galactic cosmic rays are preferentially located in the high matter density regions of galactic arm segments, as a result of the weight of the matter in these arms tieing the magnetic fields and h...
متن کاملNuclear Interaction Gamma-Ray Lines from the Galactic Center Region
Aims. The accretion of stars onto the central supermassive black hole at the center of the Milky Way is predicted to generate large fluxes of subrelativistic ions in the Galactic center region. We analyze the intensity, shape and spatial distribution of de-excitation gamma-ray lines produced by nuclear interactions of these energetic particles with the ambient medium. Methods. We first estimate...
متن کاملDiffuse gamma-ray emission: Galactic and extra- galactic
Here is reviewed our current understanding of Galactic and extragalactic diffuse γ-ray emission. The spectrum of the extragalactic γ-ray background above 30 MeV can be well described by a power law with photon index α=2.1. In the 2-10 MeV range a preliminary analysis of COMPTEL data indicates a lower intensity than previously found, with no evidence for an MeV bump. Most of the models of a trul...
متن کاملDiffuse Galactic Soft Gamma-Ray Emission
The Galactic diffuse soft gamma-ray (30-800 keV) emission has been measured from the Galactic Center by the HIREGS balloon-borne germanium spectrometer to determine the spectral characteristics and origin of the emission. The resulting Galactic diffuse continuum is found to agree well with a single power-law (plus positronium) over the entire energy range, consistent with RXTE and COMPTEL/CGRO ...
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ژورنال
عنوان ژورنال: Journal of Research of the National Institute of Standards and Technology
سال: 2000
ISSN: 1044-677X
DOI: 10.6028/jres.105.013