ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Using the atomic beam magnetic resonance method and using the technique of separated oscillatory fields in combination with the triple resonance method the ratiosg I /g J of the stable alkali isotopes Li, Na and K in the2S1/2-ground state have been measured at magnetic fields of about 3 kOe. Frequency shifts analogous to the Bloch-Siegert-shift, expected from theory, were observed and eliminated by extrapolation to vanishing rf-field strength. The results, uncorrected for atomic diamagnetism, are:6Li:g I /g J =−0.22356978(10)·10−3 7Li:g I /g J =−0.59042719(10)·10−3 23Na:g I /g J =−0.40184406(40)·10−3 39K:g I /g J =−0.07088613 (6)·10−3 41K:g I /g J =−0.03890837 (4)·10−3 Furthermore, the hyperfine structure splitting constants in the2 S 1/2-ground states have been determined. Using the most precise absoluteg J -values available so far one can calculate absolute values for the uncorrectedg I - factors. The results are:Δν/MHz −g I·103 6Li: 228.2052590(30) 0.4476540 (3)7Li: 803.5040866(10) 1.1822130 (6)23Na: 1771.6261288(10) 0.8046108 (8)39K: 461.7197202(14) 0.14193489(12)41K: 254.0138720(20) 0.07790600 (8) By comparing the absoluteg I - factors with measurements received by the NMR-method, the chemical shifts of the NMR-frequencies caused by the hydrate surrounding of the alkali ions in the NMR-probe are determined.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01680407
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