POSITRON EMISSION PARTICLE TRACKING - A TECHNIQUE FOR STUDYING FLOW WITHIN ENGINEERING EQUIPMENT

被引:300
作者
PARKER, DJ
BROADBENT, CJ
FOWLES, P
HAWKESWORTH, MR
MCNEIL, P
机构
[1] UNIV BIRMINGHAM,SCH CHEM ENGN,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
[2] UNIV BIRMINGHAM,SCH CHEM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
关键词
D O I
10.1016/0168-9002(93)90864-E
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The use of the Birmingham positron camera for tracking positron-emitting particles within engineering structures has been investigated, using particles containing typically 4 MBq (100 muCi) F-18 or Na-22. An algorithm for discarding gamma-ray trajectories corrupted by scattering, etc., and using the remaining trajectories to compute the particle's location in three dimensions has been developed, and its performance explained. A slowly moving particle can be located to within 1 mm several times per second, while a particle moving at 1 ms-1 can be located to within 5 mm 50 times per second, through a considerable thickness of surrounding material. An example of results obtained from tracking a particle in a rotating drum of powder illustrates the potential value of the technique.
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页码:592 / 607
页数:16
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