Features: ·Tritium efficiency in tritium window................................ 60% Typ.·Background noise in tritium window...............16cpm Typ. (R331)·18cpm Typ. (R331-05)·Tritium end point (T.E.P.) voltage.................................. 1700V Typ.·Dark pulse summation at T.E.P. voltage......
R331-05: Features: ·Tritium efficiency in tritium window................................ 60% Typ.·Background noise in tritium window...............16cpm Typ. (R331)·18cpm Typ. (R331-05)·Tritium end point (T....
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Parameter | Value | Unit | |
Supply Voltage | Between Anode and Cathode | 2500 | Vdc |
Between Anode and Last Dynode | 500 | Vdc | |
Average Anode Current | 0.2 | mA | |
Ambient Temperature | -80 to +50 |
The R331 and the R331-05 are 51mm (2 Inch) diameter series photomultiplier tubes specifically developed for the liquid scintillation counting. They feature low background noise, high tritium efficiency, good linearity and high gain. The R331 uses a synthetic silica input window and the R331-05 uses a low K content borosilicate glass input window, both with a frosted surface and convex-concave shape. They offer minimized glass scintillations and high collection efficiency.