REXON
Components, Inc.
NaI(TL) Technical Specifications
www.rexon.com
1 of 3 pages
NaI(Tl) SCINTILLATION CRYSTAL SPECIFICATIONS
Physio-Chemical Properties
Chemical Name:
Chemical Formula:
Type / Form:
Structure
3
Sodium Iodide (Thallium Activated)
NaI(Tl)
Solid, Single Crystal
Cubic, Face Centered (FCC)
Density (g/cm )
Molecular Weight AMU
Effective Atomic No. “Z”
3.671 (X-ray); 3.6714 (Weight-Experimental)
149.849
50.8
Cleavage
(100)
Hardness (Mho)
Melting Point (0C)
2.0
651
Hygroscopic
Solubility in H2O (g/100g @ 25°C )
Solubility in Alcohol (g/100g @ 25°C)
Solubility in Acetone (g/100g @ 25°C)
Yes
184
42.57
39.9
Radiation-Scintillation Properties
Relative light yield, PH (%)-PMT
Photon Yield/Mev (PMT Sensor)
SCINT. Quantum Efficiency with PMT
100%*(Other scintillators are measured relative to NaI(Tl)
45,200
13.5%
Photon Yield/Mev (Si-PD Sensor)
SCINT. Quantum Efficiency with PD
43,000
12.85%
Is/Id(amps)PMT Norm. to NaI(Tl)
100% *
∆E/E-% FWHM for Dia. = Ø2.0” x 2.0” L ≤ 5.8 BEST MEASURED for 662 kev g-rays
∆E/E-% FWHM for Most Sizes
Typical 6.5%-8.5%
Radiation Length (cm)
Radiation Hardness To g Ray (rad)
2.59
>1000
Linear Attenuation Coeff. (cm-1)
Thickness to Attenuate 90% g-Rays
0.3505 (for 500 Kev)
6.5 cm
a/b Ratio Cleaved Surface
241
a/b Ratio ( Am-Tl) Doping
0.6-0.7
0.82
Rexon Components,Inc.
24500 Highpoint Road
Beachwood, Ohio 44122-6022 USA
E-mail: sales@rexon.com
Visit us at www.rexon.com
Phone: (216) 292-7373
Fax: (216) 292-7714
Phone (24/7): 440) 585-7086
REXON
Components, Inc.
NaI(Tl) Technical Specifications
www.rexon.com
2 of 3 pages
Optical Quality
Appearance
Clear, Water White
Index of Refraction @ 589.3 nm Na-D 1.7745
Index of Refraction @ 415 nm
1.85 @ lMAX
Bar-Geometry, Entrapped Light
52.4% in air surrounding
Emission Peak Wavelength (nm)
Decay Constant At Room Temp. (ns)
Percent Intensity in Mode
413/White
230/(>150ms)
91% / 9%
Risetimes-ns (10%-90%)
8
Afterglow at 6 msec (%)
0.3—0.5
Temp. Coeff. of Scint. Light
(-0.2 to -0.95)%/0C @200C-400C
Thermal Coeff. Of Linear Expansion
47.4 X10 % /0C
Thermal Conductivity
83 x 10 Cal/sec cm2 0C
-6
-4
Mechanical Properties
Youngʼs Modulus 1010 N/m2
2.02 Average Calculated from Elastic constants Flexure
2.2 Tension/Compression
Shear Modulus 109 N/m2
7.67
Bulk Modulus 1010 N/m2
1.8
Poissonʼs Ratio
0.314
Yield Strength (psi) Flexure
254-344 Single Crystal
585-900 Polycrystalline Measured
Mechanical Behavior at Room Temp.
Plastic flow considerable in Single Crystal
Polycrystalline form is almost brittle
Rexon Components,Inc.
24500 Highpoint Road
Beachwood, Ohio 44122-6022 USA
E-mail: sales@rexon.com
Visit us at www.rexon.com
Phone: (216) 292-7373
Fax: (216) 292-7714
Phone (24/7): 440) 585-7086
REXON
NaI(TL) Technical Specifications
Components, Inc.
www.rexon.com
3 of 3 pages
NaI(TL) CRYSTAL BLANK SPECIFICATIONS
Dimensions:
OR
OR
Length_________ Width_________Height______________
Diameter________ Length___________
For Other Geometries Attach a Drawing or Sketch
Tolerances:
All dimensions +.25/-.00mm (+.010"/-.000")
Resolution:
For Dia. = Ø2.0” x 2.0” Length ≤ to 7.6% FWHM @ 662Kev for Cs137*
Appearance:
Crystal blanks are to be water white with NO visual imperfections. Such
imperfections typically include flock & inclusions, striae, edge cracks due to
heat fractures, etc. - The crystal blank should be free from these defects.
*As measured with a catalog spec. Hamamatsu R-1306 2" PMT or equivalent
It is not necessary to measure each and every blank. A representative sample
cut from the same boule or ingot-section should meet this performance criteria.
All surfaces supplied should be at minimum industry-standard scintillation
polish, unless otherwise specified.
Rexon Components,Inc.
24500 Highpoint Road
Beachwood, Ohio 44122-6022 USA
E-mail: sales@rexon.com
Visit us at www.rexon.com
Phone: (216) 292-7373
Fax: (216) 292-7714
Phone (24/7): 440) 585-7086