High resolution scintillation crystal
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United States of America Patent
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Jan 20, 1987
Grant Date -
N/A
app pub date -
Oct 17, 1984
filing date -
Oct 17, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For use in downhole logging tools responsive to gamma rays or x-rays, an improved scintillation device is set forth. In the preferred and illustrated embodiment, a scintillation crystal, typically sodium iodide (thallium activated), is utilized. It is an elongated, regular structure having two ends, and separate photomultiplier tubes (PMT) are attached at the separate ends. The two PMT output signals are supplied to a circuit which forms a signal adjusted or modified to compensate for loss of light energy arising during transmission through the scintillation crystal to the PMT's.
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