Physical Review Letters

Hyperfine structure of the metastable 5 S2 state of O17 using an AlGaAs diode laser at 777 nm

Guglielmo Maria Tino, Leo W. Hollberg, Antonio Sasso, M. Inguscio, Michele Barsanti

Published Jun 18, 1990• 21 citations

Abstract

By exploiting a narrow-linewidth dipole-laser source we measure the hyperfine structure of the $^{5}$${\mathit{S}}_{2}$ state of $^{17}\mathrm{O}$. Nuclear parameters can be calculated from the measured hyperfine structure. Recorded collision-free linewidths allow an estimate of the lifetime of levels involved in a new scheme proposed for the cooling of atomic oxygen.

DOI: 10.1103/physrevlett.64.2999

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Physical Review Letters

Hyperfine structure of the metastable 5 S2 state of O17 using an AlGaAs diode laser at 777 nm

Guglielmo Maria Tino, Leo W. Hollberg, Antonio Sasso, M. Inguscio, Michele Barsanti

Published Jun 18, 1990• 21 citations

Publisher

Abstract

By exploiting a narrow-linewidth dipole-laser source we measure the hyperfine structure of the

^{5}$${\mathit{S}}_{2}

state of

^{17}\mathrm{O}

. Nuclear parameters can be calculated from the measured hyperfine structure. Recorded collision-free linewidths allow an estimate of the lifetime of levels involved in a new scheme proposed for the cooling of atomic oxygen.

DOI: 10.1103/physrevlett.64.2999

Related papers

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Albert Frisch, K. Aikawa, Michael F. Mark +3 more

We have measured and analyzed the hyperfine structure of two lines, one at 583 nm and one at 401 nm, of the only stable fermionic isotope of atomic erbium as well as determined its isotope shift relative to the four most-abundant bosonic isotopes. Our work focuses on the $J\ensuremath{\rightarrow}J+1$ laser cooling transitions from the $[\text{Xe}]4{f}^{12}6{s}^{2}{(}^{3}{H}_{6})$ ground state to two levels of the excited $[\text{Xe}]4{f}^{12}6s6p$ configuration, which are of major interest for experiments on quantum degenerate dipolar Fermi gases. From a fit to the observed spectra of the strong optical transition at 401 nm we find that the magnetic dipole and electric quadrupole hyperfine constants for the excited state are ${A}_{e}/h=\ensuremath{-}100.1(3)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$ and ${B}_{e}/h=\ensuremath{-}3079(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$, respectively. The hyperfine spectrum of the narrow transition at 583 nm, was previously observed and accurate ${A}_{e}$ and ${B}_{e}$ coefficients are available. A simulated spectrum based on these coefficients agrees well with our measurements. We have also determined the hyperfine constants using relativistic configuration-interaction ab initio calculations. The agreement between the ab initio and fitted data for the ground state is better than 0.1%, while for the two excited states the agreement is 1% and 11% for the ${A}_{e}$ and ${B}_{e}$ constants, respectively.We have measured and analyzed the hyperfine structure of two lines, one at 583 nm and one at 401 nm, of the only stable fermionic isotope of atomic erbium as well as determined its isotope shift relative to the four most-abundant bosonic isotopes. Our work focuses on the $J\ensuremath{\rightarrow}J+1$ laser cooling transitions from the $[\text{Xe}]4{f}^{12}6{s}^{2}{(}^{3}{H}_{6})$ ground state to two levels of the excited $[\text{Xe}]4{f}^{12}6s6p$ configuration, which are of major interest for experiments on quantum degenerate dipolar Fermi gases. From a fit to the observed spectra of the strong optical transition at 401 nm we find that the magnetic dipole and electric quadrupole hyperfine constants for the excited state are ${A}_{e}/h=\ensuremath{-}100.1(3)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$ and ${B}_{e}/h=\ensuremath{-}3079(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$, respectively. The hyperfine spectrum of the narrow transition at 583 nm, was previously observed and accurate ${A}_{e}$ and ${B}_{e}$ coefficients are available. A simulated spectrum based on these coefficients agrees well with our measurements. We have also determined the hyperfine constants using relativistic configuration-interaction ab initio calculations. The agreement between the ab initio and fitted data for the ground state is better than 0.1%, while for the two excited states the agreement is 1% and 11% for the ${A}_{e}$ and ${B}_{e}$ constants, respectively.

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Isotope shifts and hyperfine structure of the laser-cooling Fe I 358-nm line

Nicolas Huet, Manon Pettens, Thierry Bastin

We report on the measurement of the isotope shifts of the $3{d}^{7}4s\phantom{\rule{0.28em}{0ex}}a\phantom{\rule{0.28em}{0ex}}{}^{5}{F}_{5}\text{--}3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o}$ Fe i line at 358 nm between all four stable isotopes $^{54}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{56}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{57}\text{Fe}$ , and $^{58}\text{Fe}$ , as well as the hyperfine structure of that line for $^{57}\text{Fe}$ , the only stable isotope having a nonzero nuclear spin. This line is of primary importance for laser-cooling applications. In addition, an experimental value of the field and specific mass shift coefficients of the transition is reported as well as the hyperfine structure magnetic dipole coupling constant $A$ of the transition excited state in $^{57}\text{Fe}$ , namely $A(3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o})=31.241(48)$ MHz. The measurements were carried out by means of laser-induced fluorescence spectroscopy performed on an isotope-enriched iron atomic beam. All measured frequency shifts are reported with relative uncertainties below one third percent.We report on the measurement of the isotope shifts of the $3{d}^{7}4s\phantom{\rule{0.28em}{0ex}}a\phantom{\rule{0.28em}{0ex}}{}^{5}{F}_{5}\text{--}3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o}$ Fe i line at 358 nm between all four stable isotopes $^{54}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{56}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{57}\text{Fe}$, and $^{58}\text{Fe}$, as well as the hyperfine structure of that line for $^{57}\text{Fe}$, the only stable isotope having a nonzero nuclear spin. This line is of primary importance for laser-cooling applications. In addition, an experimental value of the field and specific mass shift coefficients of the transition is reported as well as the hyperfine structure magnetic dipole coupling constant $A$ of the transition excited state in $^{57}\text{Fe}$, namely $A(3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o})=31.241(48)$ MHz. The measurements were carried out by means of laser-induced fluorescence spectroscopy performed on an isotope-enriched iron atomic beam. All measured frequency shifts are reported with relative uncertainties below one third percent.

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By exploiting a narrow-linewidth dipole-laser source we measure the hyperfine structure of the

^{5}$${\mathit{S}}_{2}

state of

^{17}\mathrm{O}

[\text{Xe}]4{f}^{12}6{s}^{2}{(}^{3}{H}_{6})

ground state to two levels of the excited

[\text{Xe}]4{f}^{12}6s6p

configuration, which are of major interest for experiments on quantum degenerate dipolar Fermi gases. From a fit to the observed spectra of the strong optical transition at 401 nm we find that the magnetic dipole and electric quadrupole hyperfine constants for the excited state are ${A}_{e}/h=\ensuremath{-}100.1(3)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$ and ${B}_{e}/h=\ensuremath{-}3079(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$, respectively. The hyperfine spectrum of the narrow transition at 583 nm, was previously observed and accurate

{A}_{e}

and

{B}_{e}

coefficients are available. A simulated spectrum based on these coefficients agrees well with our measurements. We have also determined the hyperfine constants using relativistic configuration-interaction ab initio calculations. The agreement between the ab initio and fitted data for the ground state is better than 0.1%, while for the two excited states the agreement is 1% and 11% for the

{A}_{e}

and

{B}_{e}

constants, respectively.

We report on the measurement of the isotope shifts of the

3{d}^{7}4s\phantom{\rule{0.28em}{0ex}}a\phantom{\rule{0.28em}{0ex}}{}^{5}{F}_{5}\text{--}3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o}

Fe i line at 358 nm between all four stable isotopes

^{54}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{56}\text{Fe},\phantom{\rule{0.16em}{0ex}}^{57}\text{Fe}

, and

^{58}\text{Fe}

, as well as the hyperfine structure of that line for

^{57}\text{Fe}

, the only stable isotope having a nonzero nuclear spin. This line is of primary importance for laser-cooling applications. In addition, an experimental value of the field and specific mass shift coefficients of the transition is reported as well as the hyperfine structure magnetic dipole coupling constant

A

of the transition excited state in

^{57}\text{Fe}

, namely

A(3{d}^{7}4p\phantom{\rule{0.28em}{0ex}}z\phantom{\rule{0.28em}{0ex}}{}^{5}{G}_{6}^{o})=31.241(48)

MHz. The measurements were carried out by means of laser-induced fluorescence spectroscopy performed on an isotope-enriched iron atomic beam. All measured frequency shifts are reported with relative uncertainties below one third percent.