Procedures to minimize the orientation dependency of automatic drift compensation of a scintillation counter
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United States of America Patent
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Nov 26, 2013
Grant Date -
May 17, 2012
app pub date -
Nov 14, 2011
filing date -
Nov 15, 2010
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Abstract
A method of minimizing the orientation dependence of an automatic drift compensation of a scintillation counter having a rod-shaped scintillator is provided. The cosmic radiation energy spectrum is analyzed above a predefined energy threshold value for the automatic drift compensation. A counting rate of particles having an energy deposition in the scintillator greater than an energy threshold value is controlled to a constant desired counting rate value. The method determines a first integral energy spectrum of the cosmic radiation while the scintillator is upright, and a second integral energy spectrum while the scintillator is in a horizontal position. An intersection point of the first and second integral energy spectrums is detected, and the energy threshold value of the drift compensation is set to the energy threshold value pertaining to the intersection point and the desired counting rate value is set to the counting rate pertaining to the intersection point.
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