G - Physics – 01 – N
Patent
G - Physics
01
N
358/7, 358/8
G01N 23/08 (2006.01) G01F 1/00 (2006.01) G01F 1/76 (2006.01) G01N 23/12 (2006.01)
Patent
CA 1299300
ABSTRACT A device for monitoring the bulk density and/or mass flow rate of a material within a vessel using positron scattering and annihilation radiometry techniques. The positron source is disposed on one side of the vessel having walls while an annihilation region preferably forming a portion of the vessel walls is disposed on the other side of the vessel. A gamma ray detector disposed externally of the vessel and collimated from the positron source detects the absorption of the positrons within the annihilation region. Monitoring the number of positrons absorbed within the annihilation region facilitates estimating bulk density and mass flow rates.
580408
Blatchley Charles C.
Leyse Robert H.
Scheibel John R.
Sioshansi Piran
Electric Power Research Institute
Smart & Biggar
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