A pulsed Ti:sapphire laser (TSL) is applied for what is, to our knowledge, the first time to laser isotope separation. A collimated beam of a rubidium atom with a natural isotope composition ((85)Rb, 72%; (87)Rb, 28%) is excited selectively from the ground state to the 5(2)P(3/2) state by irradiation of the single-longitudinalmode TSL, and is photoionized by successive UV radiation. Ion spectra of each isotope indicate that each isotope is selectively photoionized.

Applied OpticsFeb 20, 19934 citations

Photoionization from the 5p 2P3/2 state of rubidium

Ali Nadeem, Sami Ul Haq

Physical Review AJun 8, 201120 citations

Optics Communications

New innershell photoionization lasers in the rubidium ion

Andreas Tünnermann, H. Eichmann, Carsten Momma, H. Welling, B. Wellegehausen

Published Jul 1, 1993• 0 citations

Publisher

DOI: 10.1016/0030-4018(93)90567-o

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We report two-step photoionization studies from the 5 $p$ ${}^{2}$ ${P}_{3/2}$ excited state of rubidium using two dye lasers simultaneously pumped by a common Nd:YAG laser in conjunction with a thermionic diode ion detector. The photoionization cross section at the first ionization threshold is measured as 18.8 \ifmmode\pm\else\textpm\fi{} 3 Mb and at excess energies of 0.013, 0.106, 0.229, and 0.329 eV is measured as 15, 13.6, 12.6, and 12.5 Mb, respectively. The measured value of the photoionization cross section at the threshold is used to calibrate the oscillator strengths of the 5 $p$ ${}^{2}$ ${P}_{3/2}$ \ensuremath{\rightarrow} $n$ d ${}^{2}$ ${D}_{5/2}$ (22 \ensuremath{\leqslant} $n$ \ensuremath{\leqslant} 52) Rydberg transitions.We report two-step photoionization studies from the 5$p$ ${}^{2}$${P}_{3/2}$ excited state of rubidium using two dye lasers simultaneously pumped by a common Nd:YAG laser in conjunction with a thermionic diode ion detector. The photoionization cross section at the first ionization threshold is measured as 18.8 \ifmmode\pm\else\textpm\fi{} 3 Mb and at excess energies of 0.013, 0.106, 0.229, and 0.329 eV is measured as 15, 13.6, 12.6, and 12.5 Mb, respectively. The measured value of the photoionization cross section at the threshold is used to calibrate the oscillator strengths of the 5$p$ ${}^{2}$${P}_{3/2}$ \ensuremath{\rightarrow} $n$d ${}^{2}$${D}_{5/2}$ (22 \ensuremath{\leqslant} $n$ \ensuremath{\leqslant} 52) Rydberg transitions.

Physical Review AJun 8, 201120 citations

Photoionization Cross-Section Measurements of the 5P

_{3/2}

Excited State of Laser-Cooled Rubidium

We report two-step photoionization studies from the 5

p

{}^{2}

{P}_{3/2}

excited state of rubidium using two dye lasers simultaneously pumped by a common Nd:YAG laser in conjunction with a thermionic diode ion detector. The photoionization cross section at the first ionization threshold is measured as 18.8 \ifmmode\pm\else\textpm\fi{} 3 Mb and at excess energies of 0.013, 0.106, 0.229, and 0.329 eV is measured as 15, 13.6, 12.6, and 12.5 Mb, respectively. The measured value of the photoionization cross section at the threshold is used to calibrate the oscillator strengths of the 5

p

{}^{2}

{P}_{3/2}

\ensuremath{\rightarrow}

n

{}^{2}

{D}_{5/2}

(22 \ensuremath{\leqslant}

n

\ensuremath{\leqslant} 52) Rydberg transitions.