ELECTRIC RESONANCE SPECTRUM AND DIPOLE MOMENT OF BaO
Journal Article
·
· Journal of Chemical Physics (U.S.)
The dipole moment of BaO in several vibrational states was determined to be mu 0 = 7.955 D, mu /sub 1/ = 0.997 D, mu /sub 2/ = 8.039 D, mu /sub 3/ = 8.079 D with an error of plus or minus 0.003 D by the molecularbeam electric- resonance technique. The change of the dipole moment of BaO with vibrational state agrees with the change predicted by the Rittner model of classically polar izable ions. Measurement of relative intensities of vibrational lines yields a value of 680 plus or minus 100 cm/sup -1/ for the vibiational frequency of the molecule and fourth-order Stark effect yields a value of 0.304 plus or minus 0.007 cm/sup -1/ for the rotation constant, in agreement with the more accurate spectroscopic determinations. The Ramsey method of separated oscillatory electric fields was used successfully in electric resonance, with the expected narrowing of linewidth. Because BaO is composed of spinless nuclei, it is proposed as the basis of a voltage or electric field standard that could have a precision of 1 part in 10/sup 8/. A table of fourthorder Stark coefficients is appended. (auth)
- Research Organization:
- Harvard Univ., Cambridge, Mass.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-030947
- OSTI ID:
- 4793175
- Journal Information:
- Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 37; ISSN JCPSA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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