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Alpha Spectra Inc

Scintillation Detectors since 1986

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Nomenclature

ASI Model Numbers Explained

  1. First characters, the model number prefix, indicate the scintillation detector material:
Prefix Scintillator Material
Blank NaI(Tl)
NI NaI(Tl)
CT CsI(Tl)
CN CsI(Na)
B BGO
NI NaI(Pure)
BF BaF2
CB CeBr3
CF CaF2(Eu)
LC LaCl3(Ce)
LG Li-glass
LI 6LiI(Eu)
CD CdWO4
LY LYSO
SI SrI2(Eu)
P Plastic
L Liquid
  1. For cylindrical units this is the diameter of the detector in inches times four. (All dimensional values are rounded off to the nearest whole number.) For rectilinear units this is the length of the detector in inches times four.
  2. Detector Type (X, I, D, EW, SW, T etc.), refer to the table below:
Type Name Type
Open Face X
Integral I
Demountable PMT D
End Well EW
Side Well SW
Thin T
Integral End Well IEW
Demountable Side Well DSW
Thin Open Face TX
Thin Integral TI
Demountable Thin DT
Environmental E
Environmental Integral EI
Environmental Open Face EX
Environmental Demountable ED
Ruggedized R
Ruggedized Open Face RX
Ruggedized Integral RI
Annular A
Annular Demountable End Well ADEW

 

  1. For cylindrical units this is the length of the detector in inches times four. For rectilinear units this is the width of the detector in inches times four. For thin units this is the thickness of the crystal in thousands of an inch.
  2. For rectilinear units an “X” is placed here as a spacer.
  3. Rectilinear units this is the height of the detector in inches times four.
  4. One or more of these code letters or numbers may be in this position.
Blank Aluminum housing
Q Quartz light pipe
B1 0.005” Be energy entrance window
B2 0.010” Be energy entrance window
A1 0.005” Al energy entrance window
A2 0.010” Al energy entrance window
A5 Aluminum housing
SS Stainless Steel housing
OFHC Oxygen Free High Conductivity Copper
OFE Oxygen Free Electrolytic Copper

 

  1. Following the forward slash, the PMT diameter is given in inches. It may be followed by an abbreviated PMT vendor model number in parenthesis. A SiPM manufacturer’s number may also follow the forward slash.
  2. And 9. The PMT information may be followed by any one or several of the following suffix modifiers.
B Voltage divider
N Negative High Voltage
P Preamp or Premium material depending on context
S# Special unit-variant of a standard model
G Gross counter
(XxX) Dimensional values (Dia. X Depth) of an end well unit)

 

Examples of Several Different ASI Model Numbers

CN12I12SS/3BP – CsI(Na), 3.0” diameter x 3” thick, integrally mounted 3” PMT in a stainless steel housing configured with a voltage divider and a preamp.

7IEW8Q/2 – NaI(Tl), 1.75” x 2”, quartz light pipe, aluminum housing with a 2” PMT configured with a 14 pin base.

20DT063QB2/5B (F.I.D.L.E.R.) – NaI(Tl) 5” diameter x 0.063” thick, demountable PMT, quartz light pipe, 0.010” thick Beryllium entrance window with a 5” PMT and voltage divider.

 

ASI Serial Numbers Explained

ASI serial numbers are the six-digit date followed by letters. The numbers have the format mmddyy. The letters follow the English alphabet. The ASI warranty is in effect from the date indicated by the serial number.

It is nearly impossible to include every possible configuration variable in the detector model number. You will notice, for example, that we do not track the type of connector(s) used in the model number. Our manufacturing process records and archives this information. Be reassured that if you have model number and a serial number for a detector that you previously purchased, we can let you know exactly what you purchased.

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Alpha Spectra, Inc.
715 Arrowest Court
Grand Junction, CO 81505
970-243-4477
800-231-2545

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Alpha Spectra, Inc. is the largest American-owned Scintillation Detector Manufacturer.

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