Accession Number : AD0163596


Title :   Molecular Frequency Standard.


Descriptive Note : Patent,


Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C


Personal Author(s) : Hellwig,Helmut W.


Report Date : 06 JUN 1972


Pagination or Media Count : 4


Abstract : The patent describes a molecular beam source for a molecular beam tube frequency standard using a barium oxide molecule of the form Ba(138)O(16) having spinless atoms and using electrostatic state selection, which source includes a thin-walled refractory electrically conductive oven tube containing Ba(138)O916). The oven tube, which is chemically inert to barium oxide, is surrounded by a thermionic electron emitter which is made negative with respect to the oven tube. Electrons emitted from the electron emitter bombard the oven tube and heat the barium oxide to a temperature at which Ba(138)O(16) molecules are evaporated. (Modified author abstract)


Descriptors :   (*MOLECULAR BEAMS, *PATENTS), LABORATORY EQUIPMENT, BARIUM COMPOUNDS, OXIDES, FREQUENCY, STANDARDS


Subject Categories : TEST FACILITIES, EQUIPMENT AND METEORS


Distribution Statement : APPROVED FOR PUBLIC RELEASE