LUDLUM 26-1 User Manual

Model 26-1 Frisker User’s Manual Section 4
Ludlum Measurements, Inc. Page 4-1 April 2017
Gamma Energy Compensation
The GM pancake detector has a significant over-response at lower energies
between approximately 20 to 160 keV (see red line on graph below). Any
exposure or dose measurements taken with an unfiltered GM pancake detector
would have unacceptable errors at these lower energies.
Ludlum Measurements offers two energy compensation filters that flatten the
energy response of the Model 26-1 to facilitate measuring either the exposure rate
or ambient dose equivalent rate.
The filters developed by Ludlum Measurements flatten the response to within
±20% referenced to
137
Cs (662 keV) over an energy range of 33 keV to 1.2 MeV
for exposure and down to 20 keV for ambient dose equivalent.
Sectio
n
4

LUDLUM 26-1 Specifications

General

Brand	LUDLUM
Model	26-1
Category	Measuring Instruments
Language	English