Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1991-06-06
1992-07-21
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250262, G01T 1208, G01V 500
Patent
active
051325403
ABSTRACT:
A nuclear spectroscopy method and apparatus for the analysis of a signal comprising pulses representative of random nuclear events, and for the determination of the dead time, including counting and recording, versus time, the accumulated counts of the pile-up events (PU), i.e. events identified as being characteristic of two or more overlapping events, and the counts of non pile-up events (NPU), for each of successive time intervals of a measurement cycle. Particularly the method includes: forming a preliminary reference plot of the PU count rates versus the NPU count rates; forming an actual plot corresponding to the signal under analysis, of PU count rates versus NPU count rates; and deducing the dead time from comparison between actual and reference plots. In an alternative embodiment, the method allows one to maintain constant the dead time, during the signal analysis, by: establishing a preliminary relationship between dead time and different plots of PU count rates versus NPU count rates; establishing a preliminary relationship between the plots and a functioning parameter; establishing a reference plot corresponding to an imposed dead time; establishing an actual plot; comparing the actual and reference plots; and modifying the functioning parameter so as to bring the respective actual and reference plots in compliance.
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"Radiation Detection and Measurement", by: Glenn F. Knoll (1988), pp. 615-525, 659-683, 720-730.
Adolph Robert A.
Roscoe Bradley A.
Bouchard John H.
Garrana Henry N.
Glick Edward J.
Hannaher Constantine
Schlumberger Technology Corporation
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