R331 Overview
PHOTOMULTIPLIER TUBES R331, R331-05 For Liquid Scintillation Counting Bialkali Photocathode, 51mm (2 Inch) Diameter, 12 Stages, Head-On Type The R331 and the R331-05 are 51mm (2 Inch) diameter series photomultiplier tubes specifically developed for the liquid.
R331 Key Features
- 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
- 3 × 104cpm Max. Figure of merit (E2/B)
- 200 Typ
- CATHODE RADIANT SENSITIVITY (mA/W) QUANTUM EFFICIENCY (%)
- borosilicate (Frosted) glass (Frosted)
- 10 R331-05