home en fr de <-- ^ -->

Ophthos Electrodeless Thorium Iodide Discharge Lamp
Lampe à excitation haute fréquence (Iodure de thorium)
Hochfrequenz Elektrodenlose Lampe (Thoriumjodid)

Ophthos Instrument Co., Rockville, Maryland, USA.

Application: microwave spectroscopy.

For many purposes, especially the measurement of the very rich rare-earth spectra, a source is needed which gives a large number of standards, evenly distributed throughout the spectrum. W.F. Meggers suggested in 1955 that thorium was eminently suited to this purpose. In addition to having a very large number of lines well-distributed between 2700 and 7000 Å, thorium occurs naturally as a single, even-even isotope (Z=90, A=232) so that its lines are entirely free from hyperfine structure and isotope shifts.

The tube contains a few milligrams of thorium iodide and pure helium gas at a pressure of 5 mm of Hg or less. The discharge is initiated by a Tesla coil, and maintained by coupling with a 2450 MHz microwave power generator (up to 125 W).

 

Ophthos Electrodeless Thorium Iodide Discharge Lamp

Longueur • Length • Länge : 123 mm • 1/2"
Diamètre • Diameter • Durchmesser : 12 mm • 1/2"

Ophthos Electrodeless Thorium Iodide Discharge Lamp

Ophthos Electrodeless Thorium Iodide Discharge Lamp

Ophthos Electrodeless Thorium Iodide Discharge Lamp

Ophthos Electrodeless Thorium Iodide Discharge Lamp

 


Le contenu de ce site est sous copyleft - The content of this site is under copyleft - Der Inhalt dieser Website steht unter Copyleft