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PDF R331 Data sheet ( Hoja de datos )
| Número de pieza | R331 | |
| Descripción | PHOTOMULTIPLIER TUBES | |
| Fabricantes | Hamamatsu Corporation | |
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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 pho-
tomultiplier tubes specifically developed for the liquid scintillation count-
ing. 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 min-
imized glass scintillations and high collection efficiency.
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.............. 3 × 104cpm Max.
Figure of merit (E2/B).......................................................... 200 Typ.
GENERAL
Parameter
R331
R331-05 Unit
Spectral Response
160 to 650 300 to 650 nm
Wavelength of Maximum Response
420
nm
Photo-
Material
Bialkali
—
cathode Minimum Useful Area 46 mm dia.
Window
Material
Material
Shape
Synthetic silica Low K content
borosilicate
(Frosted) glass (Frosted)
Concave-Convex
—
—
Dynode
Structure
Number of Stages
Linear focused
12
—
—
Direct
Anode to Last Dynode
2
pF
Interelectrode Anode to All Other
2.5 pF
Capacitances Electrodes
Base
21-pin glass base
—
Weight
151 g
Suitable Socket
E678-21A (Supplied)
—
Figure 1: Typical Spectral Response
TPMHB0505EA
100
R331
CATHODE
RADIANT
SENSITIVITY
10
R331-05
QUANTUM
1 EFFICIENCY
0.1
0.01
200 400 600
WAVELENGTH (nm)
800
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
Information furnished by HAMAMATS U is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. © 1998 Hamamatsu Photonics K.K.
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