Rotational-state-selective field ionization of H2 Rydberg states
| Autor: | Thomas J. Morgan, W. Setzer, Alexander de Magalhaes |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review A. 101 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.101.013425 |
| Popis: | This paper presents rotational-state-selective field-ionization spectra of highly excited triplet $nd\phantom{\rule{4pt}{0ex}}{\text{H}}_{2}$ Rydberg states. A fast $6\phantom{\rule{4pt}{0ex}}\mathrm{keV}$ beam of metastable $c{\phantom{\rule{0.16em}{0ex}}}^{3}{\mathrm{\ensuremath{\Pi}}}_{u}^{\ensuremath{-}}\phantom{\rule{0.16em}{0ex}}2p\ensuremath{\pi}$ molecules is excited to $v=0, {N}^{+}=1$ Rydberg states ($n=17$ to 27) by a frequency-doubled tunable dye laser and ionized by static electric fields. The resulting measured total ionization yields are analyzed using a model that considers a diabatic ionization pathway through the Stark map. A field of up to $\ensuremath{\sim}4\phantom{\rule{4pt}{0ex}}\mathrm{kV}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ mixes Stark manifolds, while a field of up to $\ensuremath{\sim}36\phantom{\rule{4pt}{0ex}}\mathrm{kV}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ ionizes the resulting mixture. Rotational-state population transfer of up to 50% is observed, populating neighboring ${N}^{+}=3$ manifolds ($n=12$ to $n=16$). Control over the rotational quantum state composition of the field-ionized molecules is demonstrated. |
| Databáze: | OpenAIRE |
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