Journal of the Optical Society of America B

Laser-driven ionization of Cs and absorption spectrum of resultant Cs^+ vapor

Thomas J. Mcilrath, J. Sugar, Victor Kaufman, D. Cooper, W. T. Hill

Published Mar 1, 1986• 16 citations

Abstract

By pumping the 6s–7p line of neutral cesium at 4593 Å with a flash-pumped dye laser we obtained ~80% ionization in a heat-pipe-generated Cs vapor. An absorption spectrum of Cs+ was then obtained, showing the 5p6–5p5nd and ns Rydberg series both below and above the 5p5 2P3/2 threshold. Effects of channel mixing are seen in the broadening of the nd series members above threshold and in the anomolous intensity behavior below. This strong interaction is reflected in the Lu–Fano plot shown for these data.

DOI: 10.1364/josab.3.000398

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Journal of the Optical Society of America B

Laser-driven ionization of Cs and absorption spectrum of resultant Cs^+ vapor

Thomas J. Mcilrath, J. Sugar, Victor Kaufman, D. Cooper, W. T. Hill

Published Mar 1, 1986• 16 citations

Publisher

Abstract

DOI: 10.1364/josab.3.000398

Related papers

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Jan 1, 19850 citations

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D. Popescu, C. B. Collins, B. W. Johnson +1 more

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Optical EngineeringDec 9, 20240 citations

6^{2}S_{\frac{1}{2}}

level to resonant

n^{2}D

and

n^{2}S

intermediate states, and represents, to the authors' knowledge, the first such two-photon absorption spectrum of Cs. Transitions from

n=9\mathrm{to}13

have been recorded for the $6^{2}S_{\frac{1}{2}}\ensuremath{-}n^{2}D_{\frac{5}{2},\frac{3}{2}}$ series and from

n=11\mathrm{to}14

for the $6^{2}S_{\frac{1}{2}}\ensuremath{-}n^{2}S_{\frac{1}{2}}$ series.

We report an experimental investigation of the excitation-transfer collision Cs(5

{D}_{5/2}

)+Cs(6S)\ensuremath{\rightarrow}CS ((5

{D}_{3/2}

)+Cs(6S). The upper 5

{D}_{5/2}

state was excited by a cw dye laser tuned to the one-photon, quadrupole-allowed 6S\ensuremath{\rightarrow}5

{D}_{5/2}

transition. Since the direct 5D\ensuremath{\rightarrow}6P fluorescence could not be detected with our apparatus, we monitored instead the cascade 6P\ensuremath{\rightarrow}6S fluorescence. The ratio of 6

{P}_{1/2}

to 6

{P}_{3/2}

fluorescence contains information on the collisional mixing that takes place in the 5D levels but also includes a significant contribution from mixing in the 6P levels. This latter contribution could effectively be subtracted out using the results of a second experiment in which a tunable cw diode laser was used to pump the 6

{P}_{3/2}

state, and the same fluorescence ratio monitored. The 5D mixing cross section we obtain, 70 A

{\r{}}^{2}

, is significantly larger than previous indirect determinations.