Blazars are among the largest and most energetic objects in the universe. Jets of matter (“jets”) shoot from the cores of these active galaxies shoot, which are accompanied by huge bursts of gamma rays. An international team led by Lars Fuhrmann from Bonn’s Max Planck Institute for Radio...
not available for EP0174671of corresponding document: US4682033 A gamma camera (1), has a scintillation block with an entrance window (10) constituted by a mechanically stiff supporting structure which very slightly absorbs X and gamma rays. The entrance window (10) supporting the scintillation ...
However, experimental procedures are not evenly distributed among different types of organic support: among the most extensively tested materials there are paper and wood supports (Fig.2). It should be noted that cellulose-based supports (such for books and archival documents) are often characterized...
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A source of gamma rays is glued onto a non-magnetic tube (7) located in a ring gap provided by the coils, and tube (7) is fixed to a non-magnetic disk keyed onto the shaft of a small electric motor, so the tube can be rotated in the ring gap. The pref. generator consists of...
gamma camera (1) which has a block counting input window (10) comprising a support structure mechanically rigid and extremely low radiation absorbent for x and y.the input window (10), which has the scintillator block (3) is formed of a honeycomb cellular structure made of lightweight ...
gamma camera (1) which has a block counting input window (10) comprising a support structure mechanically rigid and extremely low radiation absorbent for x and y.the input window (10), which has the scintillator block (3) is formed of a honeycomb cellular structure made of lightweight ...
The carbon matrix is mounted between two dense materials (3) such as Densimet(RTM: tungsten alloy), so as to stop beta rays, X rays and gamma rays. The materials with good heat conductivity enclose the carbon matrix and the paraffin matrix for stopping the neutron radiation. The dense ...
Let us imagine that we are emitting a spherical wavefront of light rays from a given position r > rs. Then light rays pointing outwards will move outwards, meaning that the radius of the corresponding sphere of light will grow in time, while light rays pointing inwards will move inwards, ...