Beam maser measurements of HDO hyperfine structure

摘要

The 431larr;432, 532larr;533, and 321larr;414transition in HDO were measured in a beam maser spectrometer. Accurate values for rotational transiton frequencies, the deuterium quadrupole coupling tensor, and hydrogen spinhyphen;rotation tensor were obtained from the present data combined with previous results on other transitions. Resonance line widths of 2thinsp;kHz were obtained for most of the data. Measured quadrupole coupling tensor elementseqQ(D)ggand spinhyphen;rotation tensor elementsC(X)ggin kHz are as follows:eqQ(D)aa= 276.45plusmn;0.88,eqQ(D)bb= minus;110.97plusmn;1.46,eqQ(D)cc= minus;165.77plusmn;1.10,C(D)aa= minus;1.33plusmn;0.20,C(D)bb= minus;4.38plusmn;0.36,C(D)cc= minus;2.99plusmn;0.24,C(H)aa= minus;58.42plusmn;0.47,C(H)bb= minus;5.46plusmn;0.83,C(H)cc= minus;24.11plusmn;0.55.