two-photon absorption spectroscopy in ytterbium

highly excited levels of ytterbium have been investigated using two-photon absorption spectroscopy and space-charge detection the authors tuned the 0.2 cm/sup -1/ dye laser radiation over the range 3900-4100 aa and observed the even-parity states j=0 and j=2 belonging to the series 4f/sup 14/6s ns /sup 1/s/sub 0/, 4f/sup 14/6s nd /sup 1/d..

non-optical observation of laser-induced zero-field level-crossing effects in an atomic beam

level-crossing effects have been detected non-optically with the use of a rabi-type atomic-beam method. the sodium beam was excited by intense linearly polarised radiation from a cw narrow-band dye laser. several superimposed resonances were observed in the atomic-beam signal when scanning the magnetic field around zero. the two narrower ..

hanle effect in an atomic beam excited by a narrow-band laser

the hanle effect of a hyperfine transition (connecting two levels with a non-zero angular momentum) in a sodium atomic beam, induced by a cw single-mode dye laser, has been investigated for various radiation intensities. a qualitative explanation and a quantitative interpretation of the experimental results are given the features characte..

very high resolution laser spectroscopy of an atomic jet of krypton

the structures of three lines of kr i have been investigated by means of an atomic beam containing metastable krypton atoms and excited by a cw single-mode tunable dye laser. the metastable atoms are produced inside the 'oven' of the atomic beam apparatus by a hollow cathode or by an electrodeless discharge. the isotope shifts of the stab..

laser induced line narrowing in three-level systems' application to the determination of the wavenumber of the 3s/sub 2/-2p/sub 4/ neon line (lamda=6328 aa)

the doppler-free absorption line narrowing technique (aln) is applied to the /sup 20/ne (3s/sub 2/-2p/sub 4/-1s/sub 5/) three-level system, using a /sup 127/i/sub 2/ stabilised he-ne laser (lamda=6328 aa) and a tunable single-frequency cw dye laser (lamda=5945 aa). the relative frequency positions of the /sup 20/ne 3s/sub 2/-2p/sub 4/ lin..

field ionisation study of high lying rydberg states of na

the authors describe the details of an experiment using a sodium atomic beam and two dye lasers. by stepwise excitation they have selectively populated highly excited ns, nd and, using stark mixing, np states fron n=20-50. the excited atoms were detected by field ionisation. the results obtained for the ionisation threshold fields for the..

two-photon spectroscopy of neutral barium' observations of the highly excited even levels and theoretical analysis of the j=0 spectrum

extensive new date on the even parity j=o and j=2 levels of neutral barium have been obtained using two-photon absorption spectroscopy with a nitrogen-pumped dye laser and space-charge detection. members of the rydberg series 6sns/sup 1/s/sub 0/(16 n 61), 6snd/sup 1/d/sub 2/ (15 n 81), and 6snd/sup 3/d/sub 2/ (15 n 30) and perturbing leve..

level crossing measurement of the 3/sup 2/d fine structure of lithium

the fine structure splitting of the 3/sup 2/d-state of lithium was measured using the level crossing technique with delayed observation. two nitrogen laser pumped dye lasers were used for a stepwise excitation. the linewidth observed was 40percent smaller than the natural width. the result derived for the splitting is (1080.1 +or- 1.0)mhz

very high resolution study of high rydberg levels of the configurations 4f/sup 14/ 6snd of yb i

high rydberg levels of ytterbium were studied in a beam of metastable atoms. levels of the series 4f/sup 14/ 6snd were populated from the metastable 4f/sup 14/ 6s 6p /sup 3/p/sub 0/ level by means of the uv light of a frequency-doubled single-mode dye laser and detected using the field ionization technique. the critical ionization fields ..

effects of zeeman degeneracy on optical dynamic stark splitting

in a double resonance experiment with a strong pump beam and a weak probe beam multiplet structures due to the ac stark effect can be observed. the authors report the first observation of such a multiplet in a three-level experiment. the linearly polarised beams from a cw dye laser and a i/sub 2/ stabilised he-ne laser were counter-propag..