PORTABLE LIQUID SCINTILLATION

COUNTING SYSTEM

Model # SSS-12P([fig] ([fig] ([fig] ([fig] PRS-5 electronics, Detector box,
Inside view Model DET-S12P) FEATURES:

* MEASURES ALL BETA EMITTERS AND
  LOW ENERGY GAMMA EMITTERS

* SINGLE PM TUBE DESIGN

* SETTABLE WINDOW CAN BE SET FOR ANY ISOTOPE

GAMMA BACKGROUND RADIATION
REJECTION FEATURES:

* Energy analyzer window rejects pulses
  with energies outside the window setting

* Optional Lead shielding around detector

COUNTING ASSEMBLY FEATURES:

* Excellent repeatability

* Fully light tight system

* Fail safe interlock to protect PM tubes

* High transmission optical coupling to PM tube

MOST PM TUBE AND PRE-AMP NOISE IS
ELIMINATED BY THESE FEATURES:

* High quality PM tubes and preamps

* Fully adjustable energy analyzer window
  rejects low energy pulses 

APPLICATION: The SSS-12P Manual Liquid Scintillation Counting
System accurately quantitatively measures Carbon-14, Tritium
and most other radioactive materials. But for measuring
low levels of Tritium and C-14, Model # SSS-22P is recommended.
Optionally, gamma ray counting is achieved by inserting
and optically coupling an Nal(Tl) scintillation well crystal
on the PM tube.

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.2 $

PORTABLE LIQUID SCINTILLATION

COUNTING SYSTEM

Model # SSS-12P

SYSTEM DESCRIPTION

Measuring Principal: The most sensitive method of detecting
and quantitating beta emitting isotopes is to intimately
mix the sample with liquid scintillation fluor and count
each individual scintillation event with a photomultplier
counter. Followed by an energy analyzer which further selects
the pulses and delivers the true signal. PC interface and
hard copy printer are optional. Detection cell optically
coupled to selected photomultiplier tube.

DATA ANALYSIS AND PRESENTATION

Scintillation counts which are detected by PM tubes are processed
by a fully adjustable single channel analyzer which is centered
on the energy peak of the isotope being measured. This deletes
both higher energy pulses from background radiation and
lower energy counts from the PM tube or circuit noise. The
pulses are then fed to a digital scaler and optional digital
printer. (Thus allowing long count times for measurement
of very minute samples as well as completely eliminating
artifacts caused by ratemeter time constants.) Optional
interface to parallel/or serial printers or most scientific
or personal computers or data stations.


SPECIFICATIONS:

C-14 Efficiency: Typical 90%.

Count Times: 1 sec. thru 99 sec. (1 sec. increments),
and 1 min. thru 99 min. (in 1 min. increments).

Voltage: 0-2000 Volts - fully user settable.

Readout: Digital - 6 digit LCD, (LED optional).

Outputs: Standard: Serial pulse output.
Optional: RS-232 serial or pcmcia DAQ-2 card for portable
pc.

Power: 3 D Cells + AC adapter

Physical Spec: +-------------------+---------------------------------------+-----------------------+
|      Model:       |                PRS-5                  |       DT-S-12P        |
+-------------------+---------------------------------------+-----------------------+
+-------------------+---------------------------------------+-----------------------+
|   Dimensions:     |       (9" L x 4.1" W x 5.7" H)        | (18" L x 6" W x 6" H) |
+-------------------+---------------------------------------+-----------------------+
|     Weight:       | 1.7  Kg (6 lbs) including batteries.  |    6.8 Kg (15 lbs)    |
+-------------------+---------------------------------------+-----------------------+
| Shipping Weight:  |                2.5 Kg                 |         9 Kg          |
+-------------------+---------------------------------------+-----------------------+


Sample Size: Accepts standard Liquid Scintillation
vials up to 1.1" diam. x 2-1/2"
H.

Scintillation Fluors: Accepts most scintillation
fluors.

OPTIONS

A. Digital Printer Model MPM-40DT - Battery operated printer
with date & time stamp.

B. Calibrated Sources: Set of 3 calibrated standards, C-14,
H-3 and background, all unquenched in sealed vials.

Optional Interfaces and Outputs: Clear instructions with
all interfaces.

C. Serial RS-232 output. Model # MCC-23.

D. Data logging software, Model # WIN-W

E. Data aquisition card with driver, Model # DAQ-2

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.2 $