78 mm (3") photomultiplier
9265B series data sheet
1 description

6 characteristics

The 9265B is a 78mm (3”) diameter, end window
photomultiplier with blue-green sensitive bialkali
photocathode and 9 high gain, high stability, SbCs dynodes oflinear focused design for good linearity and timing.

2 applications
x-ray and gamma-ray spectroscopy

3 features••

low operating voltage
good pulse height resolution

4 window characteristics
9265B
borosilicate
spectral range *(nm)refractive index (nd)KThU

295 - 630
1.49(ppm)
(ppb)
(ppb)

300250100* wavelength range over which quantum efficiency exceeds 1 % of peak

photocathode: bialkali
active diametermm
quantum efficiency at peak%luminous sensitivityµA/lmwith CB filter
with CR filter
dynodes: 9LFSbCs
anode sensitivity in divider A:
nominal anode sensitivity
A/lmmax. rated anode sensitivity
A/lm
overall V for nominal A/lm
Voverall V for max. rated A/lm
V6gain at nominal A/lmx 10
dark current at 20 ºC:
dc at nominal A/lmnA
dc at max. rated A/lmnA
pulsed linearity (-5% deviation):
divider A
mA
divider B
mA
rate effect ( Ia for∆ g/g=1%):µA
magnetic field sensitivity:
the field for which the output
decreases by 50 %-4
most sensitive direction
T x 10-1
temperature coefficient:% ºC
timing:single electron rise timenssingle electron fwhm
nstransit timensweight:g
maximum ratings:
anode currentµA
cathode currentnA
6gainx 10sensitivity
A/lm
temperature°C(1)
V (k-a)VV (k-d1)
V(2)
V (d-d)Vambient pressure (absolute)kPa(1)subject to not exceeding max. rated sensitivity

5 typical spectral response curves

8

typ70
30
75
12250200950
1150
0.7A/ l m

B

1.7
± 0.5
7.5
1540
125
100
200
3200602100
450300
202-30(2)

subject to not exceeding max rated V(k-a)

8

10

7

10200
100
50

610
divider B

divider A

10510

1300

500
wavelength nm

700

530
100
20

1,000

0100

1300

0.5
2

10,00020

10max

7 typical voltage gain characteristics

30
quantum effi ci ency %min

9000.1

4

100.2

0.4

0.6

0.81.01.2Vk-a (kV)

1.4

1.6

1.8

2.0

gai n•unit

8 voltage divider distribution
kA
B

d1 d2

d6RRRR3R3R

d7 d89265B series data sheet
page 211 ordering information

d9aR R 2R R
2R 3R 4R 3R

StandardHigh Pulsed
linearity

Characteristics contained in this data sheet refer to divider A
unless stated otherwise.

The 9265B meets the specification given in this data sheet.
You may order variants by adding a suffix to the type number.
You may also order options by adding a suffix to the typenumber. You may order product with specification options
by discussing your requirements with us. If your selection
option is for one-off order, then the product will be referred toas 9265A. For a repeat order, ET Enterprises will give theproduct a two digit suffix after the letter B, for example B21.
This identifies your specific requirement.

9265

9 external dimensions mmbase options
KKFL

The drawings below show the 9265B in hardpin format, the9265KB with the B14A cap fitted and the 9265FLB in flying
lead format with the temporary B14A cap fitted. The cap is
attached as agreed with the customer.

cappedflying lead base withtemporary B14A cap

options
Eelectrostatic shielding
see drawing below
supplied with spectral
response calibrationM

specification options
BA

as given in data sheet
single order toselected specification
repeat order toselected specification

Bnn

78.8 max
conductive coating(for E option)

insulating sleeve(for E option)

52.3 max

10 base configuration (viewed from below)

d6
d5
d4
d3

d7

654d2

7d8 ic d989 10 11

B19A
3d121ic

19a12 ic
13ic
1415 ic
16 ic
1718 ic

kic

B19A hardpin base(for 9265B)‘ic’ indicates aninternal connection

d6d7d8786d5ic
9105d4 4d3 3d2

B14A
21d1

14d9

11a12ic

13ic

k

B14A cap(for 9265KB)

cld5
7d4 6

cl 5d 43d2

d6 d7 cl d8
9 10 11 12 d9
13 cl
8

3cl

FL
2 1

21 20

1415 a16 cl
17cl
1819 cld1 cl cl

12 voltage dividers
The standard voltage dividers available for these pmts aretabulated below:

k9265
B/XXXB KBflying lead base(for 9265FLB)
after removal oftemporary cap‘cl’ indicates cut lead

Our range of B19A sockets is available to suit the B19B
hardpin base. Our range of B14A sockets is available to suit
the temporary B14A cap when the flying lead base variant isselected. Both socket ranges include versions with our
without a mounting flange, and with contacts for mounting
directly onto printed circuit boards.
ET Enterprises Limited
45 Riverside Way
Uxbridge UB8 2YF
United Kingdom
tel: +44 (0) 1895 200880
fax: +44 (0) 1895 270873
e-mail: sales@et-enterprises.com
web site: www.et-enterprises.com

ADIT Electron Tubes
300 Crane Street
Sweetwater TX 79556 USA
tel: (325) 235 1418
toll free: (800) 399 4557
fax: (325) 235 2872
e-mail: sales@electrontubes.com
web site: www.electrontubes.com

d2d5

3R

R

R

R

C648B C634B C656B

3R

R

R

2R 3R

C648C C634C C656C

450 V

R

R

R

C648D C634D C656D

450 V

R

R

2R 3R

FLB

C648A C634A C656A

d1k

d7d6

d8 d9
R
R

R

aR

4R 3R
R

R

4R 3R

R = 330 k Ω*mumetal is a registered trademark of Magnetic Shield Corporation

choose accessories for this pmt on our website

an ISO 9001 registered company
The company reserves the right to modify these designs and specifications without notice.
Developmental devices are intended for evaluation and no obligation is assumed for future
manufacture. While every effort is made to ensure accuracy of published information thecompany cannot be held responsible for errors or consequences arising therefrom.

© ET Enterprises Ltd, 2010
DS_ 9265B Issue 7 (06/09/10)