Electronic gJ Factors, Natural Lifetimes, and Electric Quadrupole Interaction for Rb 87 in the np ^(2)P_(3/2) Series of the Rb I Spectrum

• For Rb 87 the level crossing method was applied to the first four levels ( n = 5, 6, 7, and 8) of the np 2 P 3/2 series in the Rb I spectrum. By using magnetic dipole interaction constants from corresponding zero field optical double resonance experiments, the electronic g J factors of 5, 6, and 7 p 2 P 3/2 were calculated from the level crossing data. For these levels the natural radiative lifetimes were determined from the half-widths of the level crossing signals. For 8 p 2 P 3/2 the a factor was obtained assuming g J = -1.336 (2). From the measured electric quadrupole interaction constants b , decreasing values of the nuclear quadrupole moment Q were obtained in 5, 6, 7, and 8 p 2 P 3/2 . When core polarization effects are taken into account, the different 2 P 3/2 levels yield consistent values for the quadrupole moment. We find ----- -- g J (5 p 2 P 3/2 ) = -1.3362 (6) -- g J (6 p 2 P 3/2 ) = -1.3347 (10) ----- -- Ï (5 p 2 P 3/2 ) = 25.8 (8) ns -- Ï (6 p 2 P 3/2 ) = 111 (3) ns ----- -- b (5 p 2 P 3/2 ) = 12.510 (57) MHz -- b (6 p 2 P 3/2 ) = 3.947 (13) MHz ----- -- Q (5 p 2 P 3/2 ) = 0.131 barn -- Q (6 p 2 P 3/2 ) = 0.133 barn ----- -- g J (7 p 2 P 3/2 ) = -1.3359 (11) -- a (8 p 2 P 3/2 ) = 6.747 (14) MHz ----- -- Ï (7 p 2 P 3/2 ) = 233 (10) ns -- b (8 p 2 P 3/2 ) = 0.933 (20) MHz ----- -- b (7 p 2 P 3/2 ) = 1.768 (8) MHz -- Q (8 p 2 P 3/2 ) = 0.131 barn ----- -- Q (7 p 2 P 3/2 ) = 0.133 barn -- ----- Considering possible sources of error in the evaluation of the quadrupole moment we obtain Q (Rb 87 ) = +0.132 (9) barn.

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NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

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