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high-resolution gamma-ray imaging measurements using externally segmented germanium detectorsFully two-dimensional gamma-ray imaging with simultaneous high-resolution spectroscopy has been demonstrated using an externally segmented germanium sensor. The system employs a single high-purity coaxial detector with its outer electrode segmented into 5 distinct charge collection regions and a lead coded aperture with a uniformly redundant array (URA) pattern. A series of one-dimensional responses was collected around 511 keV while the system was rotated in steps through 180 degrees. A non-negative, linear least-squares algorithm was then employed to reconstruct a 2-dimensional image. Corrections for multiple scattering in the detector, and the finite distance of source and detector are made in the reconstruction process.
Document ID
20060042172
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Callas, J.
Mahoney, W.
Skelton, R.
Varnell, L.
Wheaton, W.
Date Acquired
August 23, 2013
Publication Date
January 1, 1994
Distribution Limits
Public
Copyright
Other
Keywords
spectroscopy gamma ray germanium sensor nucleosynthesis solar flare physics