Caesium Iodide CsI
Download Caesium Iodide (Cesium Iodide) is the material with the deepest known IR transmission, and is sometimes used for components in the widest range spectrophotometers. An extremely soft material, Cesium Iodide is extremely difficult to polish, and so performance is compromised for range. Doped with Thallium, CsI(Tl) is a useful scintillator which emits at a wavelength that is a good match for Silicon photodiodes. Arrays of Cesium Iodide are used in security imaging systems.
| µm | No |
|---|---|
| 0.5 | 1.8064 |
| 1.0 | 1.7572 |
| 2.0 | 1.7466 |
| 3.0 | 1.7440 |
| 4.0 | 1.7431 |
| 5.0 | 1.7424 |
| 6.0 | 1.7418 |
| 7.0 | 1.7412 |
| 8.0 | 1.7406 |
| 9.0 | 1.7399 |
| 10.0 | 1.7392 |
| 11.0 | 1.7384 |
| 12.0 | 1.7375 |
| 13.0 | 1.7365 |
| 14.0 | 1.7355 |
| µm | No |
|---|---|
| 15.0 | 1.7344 |
| 16.0 | 1.7332 |
| 17.0 | 1.7319 |
| 18.0 | 1.7306 |
| 19.0 | 1.7291 |
| 20.0 | 1.7276 |
| 21.0 | 1.7260 |
| 22.0 | 1.7244 |
| 23.0 | 1.7226 |
| 24.0 | 1.7207 |
| 25.0 | 1.7188 |
| 26.0 | 1.7168 |
| 27.0 | 1.7147 |
| 28.0 | 1.7125 |
| µm | No |
|---|---|
| 29.0 | 1.7101 |
| 30.0 | 1.7077 |
| 31.0 | 1.7052 |
| 32.0 | 1.7027 |
| 33.0 | 1.7000 |
| 34.0 | 1.6972 |
| 35.0 | 1.6943 |
| 36.0 | 1.6913 |
| 37.0 | 1.6882 |
| 38.0 | 1.6849 |
| 39.0 | 1.6816 |
| 40.0 | 1.6781 |
| 41.0 | 1.6746 |
| 42.0 | 1.6709 |
| µm | No |
|---|---|
| 43.0 | 1.6671 |
| 44.0 | 1.6631 |
| 45.0 | 1.6591 |
| 46.0 | 1.6549 |
| 47.0 | 1.6505 |
| 48.0 | 1.6460 |
| 49.0 | 1.6414 |
| 50.0 | 1.6366 |
Caesium Iodide is grown by sealed ampoule Stockbarger techniques with ingots of approximately 70mm diameter. CsI is very soft and pliable.
IUPAC International Union of Pure and applied Chemistry recommends the spelling as Cesium. UK Useage is Caesium.
REFERENCES:
(1) Handbook Optical Constants, ed Palik, V2, ISBN 0-12-544422-2
(2) Rodney, J.Opt.Soc.Am. V45, p987, 1955
(3) Combes et al, J.Opt.Soc.Am. V41, p215, 1951
(4) Kelly, Bureau of Mines Bulletin, No371, p51, 1934