Search for Black Holes : New Approach to MeV Gamma-Ray All Sky Survey(Session 8 : Key Physical Evidence for BHs)

概要

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Gamma-ray astronomy has become a very promising field in astronomy. In the MeV region, there still remain many unobserved interesting celestial objects such as black holes and quantum effects objects predicted from quantum cosmology, which emit MeV gamma rays presumably. Thus MeV gamma-ray astronomy is expected to reveal the new universe in near future, although the progress of it seems relatively slow. The delay of MeV gamma-ray astronomy is mostly due to the nonexistence of a reliable imaging method of MeV gamma rays. For gamma rays imaging, optical methods such as a reflector are hardly available, and hence only the full reconstruction of the scattering process is a possible and promising approach. Here we report on a new method and instrument, which provide not only a complete reconstruction of Compton process for the first time but also a strong background-rejection power by obtaining a 3-D image of the recoil electron, and have successfully obtained the first gamma-ray image by the full reconstruction of the direction of gamma rays event by event.
理論物理学刊行会の論文
2004-11-15