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Universal Scintillation Probe SSU-3-2
General Features
The Universal Scintillation Probe SSU-3-2 is designed for measurement of alpha, beta, X and gamma radiation by means of properly selected scintillators. It is especially useful for measurement of samples emitting ionising radiation. Due to possible optional equipment, the probe enables making of most measurements in nuclear medicine, biological and industrial laboratories. It is adapted for operation with RUM-1 radiometer, manufactured by Zaklad Urzadzen Dozymetrycznych POLON-ALFA. Simple and durable casing, high reliability, good technical characteristics and simple operation enable application of the probe for measurements of samples activity in many different places. It is especially useful in application:
·- for measurements of probes activity of alpha, beta, X and gamma radiation emitters in wide energy range;
·- for checking of contamination of tampons used for decontamination of tables and benches or equipment in radiobiology and other radioisotope laboratories;
·- for measurements of small dose rates of X and gamma radiation;
·- for spectrometry of X and gamma radiation.

Design
The SSU-3-2 Probe is a an element of the unified range of 65.6 mm diameter probes – a scintillation counter, using a high gain and stable 2” photomultiplier placed on a central spring. Such solution helps in installing and changing of different scintillators and ensures good repeatability of the probe parameters. The probe can be connected to the radiometer with one co-axial cable with BNC-2.5 connector. It means, that high voltage for the photomultiplier is fed with the same cable as carrying away of output signal.
The probe design ensures easy changing of scintillators. It is easy to fit of the probe to another supply-counting equipment; necessary input circuit is shown in the Operating Instruction. The probe contains an output pulse pre-amplifier, supplied with current of HV divider.

Technical Data
Supply voltage 750 to 1400 VDC
Current consumption 35 mA (at 1400 V)
Scintillator see table
Background see table
Output pulse:
- amplitude ≥ 100 mV
(depends on used scintillator)
- duration see table
- rise time see table
Efficiency (sensitivity) see table

Ordering
SSU-3-2 probes are equipped with scintillators according to customer requirements. For this reason, each order should contain information concerning requested scintillators. Additionally, a scintillator NaJ/Tl 45 dia. x 50 mm can be ordered.