Abstract
Pankhurst has described a band spectrum believed by him to belong to an oxide of silicon, possibly Si. A better excitation of the same bands has been obtained from a similar source (a high voltage uncondensed discharge through a constriction in a quartz tube), but in helium gas instead of hydrogen. These bands have been photographed on the 30-foot, 30,000 lines per inch Chicago grating spectrograph. A band near has been resolved in the first and second orders and found to be a (0,0) transition, overlapped by a weak (1,1) transition, of the type , having the constants The coefficients of the spin doubling for the two states are , or , the value of not certainly fixed as between these two alternatives. The doublet structure and the values prove that the emitter is Si. Other bands at have been resolved with weak intensity and tentatively ascribed to Si.
- Received 9 March 1943
DOI:https://doi.org/10.1103/PhysRev.63.426
©1943 American Physical Society