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A proof-of-concept experiment was performed to demonstrate the three-dimensional imaging capabilities of an all-germanium Compton camera for near-field sources. Eight high purity germanium (HPGe) coaxial detectors were configured in two planes of four detectors each. The data acquisition system was assembled from available hardware and off-the-shelf electronics using standard NIM and CAMAC modules. Sixteen-parameter data were recorded event-by-event for later analysis and image reconstruction. The energy resolution of the system was 0.3% at 1333 keV. Preliminary analysis indicates the position resolution for a source at one meter and a specific detector geometry was less than a centimeter.

The reaction 7o~e~160, 2p2n) Sr with E~160) 80 MeV was used to study the nucleus Sr. Measurements were made of the excitation functions, angular distributions, and y-y-t coincidences.From these measurements six new levels were placed in the level scheme of ' Sr at 2683.7, 3609.2, 4367.1, 5308.4, 6364.4, and 7827.8 keV. A gamma ray with a very high anisotropy [ A2 ---1.05 (7), Aq --0.12(6)] feeds the (11 ) level at 5914.5 keV; A new band based on the level at 3525.7 keV was identified. The sequence of transitions decaying down the negative parity band was reordered to S22-1005-876-694 keV.