FLOW THRU SCINTILLATION SYSTEM
Model # SSS-13
- COMPLETELY SHIELDED WELL COUNTER.
- UNIVERSALLY USEFUL WITH STANDARD
SCALERS, RATEMETERS, AND SPECTROMETERS
- ACCEPTS BEAKERS, FLASKS, PLANCHETS, ETC.,
IN ADDITION TO TEST TUBES
When the SSS-13 is used
with a suitable readout system such as FS-5T or
a member of the FM-7 modular ratemeter recorder series with alarm
capability (e.g. FIL-7WE), it functions as an automatic column fraction
separator. The output relay of the alarm may be set to operate a fraction
cutter or a stepping solenoid valve whenever an active component passes
through the detector.
Figure 1: SSS-13
Thus for extremely long slow elutions, the apparatus
may be left unattended with assurance that each active component will
be separately collected.
Liquid being monitored passes through a cell packed
with carefully graded anthracene or CaF2 (Eu) scintillator.
The cell is optically coupled to a selected photomultipler tube and
gives counting efficiencies for H-3 of up to 20%, for C-14 of 25%
to 40% where the liquid passing through the cell is essentially colorless.
Both CaF2(Eu) and anthracene scintillator are completely
insoluble in most organic solvents and is essentially insoluble in
aqueous solutions in which the pH is not too low, so sample liquid
Optional metering pump and mixing chamber
mixes controlled amount of liquid scintillator with sample to give
higher sensitivity for C-14 and S-35. (Please use Model SSS-33 for
The probe operates at approximately 1150 Volts from well regulated
DC supply. ``O'' ring seal on cell simplifies cleaning and/or
replacement of crystals. Cell liquid capacities are available down
to 0.05cc for analytic runs and 1cc for preparative runs (or 1/2,
2, 5 or 10cc).
Background is 50cpm per 1ml capacity detector, shielded in
Replacement cells are available.
Selected graded CaF2(Eu) and anthracene are available
in 100 gram lots.
The SSS-13 scintillation counting
system is fully compatible with all scalers and ratemeters of the
FS and FM series, allowing (with use of single channel analyzer module
MGA-5) accurate determination of many nuclides at or below background
counting rate and in the presence of appreciable amounts of radioimpurities.
Schematic of SSS-13
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