arXiv:1711.04667 · Physical Review A

Spectroscopy of the S1/22→P3/22 transition in Yb ii: Isotope shifts, hyperfine splitting, and branching ratios

Thomas Feldker, Henning A. Fürst, Norman Vincenz Ewald, J. Joger, R. Gerritsma

Published Mar 19, 2018• 15 citations

Abstract

We report on spectroscopic results on the $^{2}S_{1/2}\ensuremath{\rightarrow}\phantom{\rule{0.16em}{0ex}}^{2}P_{3/2}$ transition in single trapped ${\mathrm{Yb}}^{+}$ ions. We measure the isotope shifts for all stable ${\mathrm{Yb}}^{+}$ isotopes except $^{173}\mathrm{Yb}^{+}$, as well as the hyperfine splitting of the $^{2}P_{3/2}$ state in $^{171}\mathrm{Yb}^{+}$. Our results are in agreement with previous measurements but are a factor of 5--9 more precise. For the hyperfine constant $A(^{2}P_{3/2})=875.4(10)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}$ our results also agree with previous measurements but deviate significantly from theoretical predictions. We present experimental results on the branching ratios for the decay of the $^{2}P_{3/2}$ state. We find branching fractions for the decay to the $^{2}D_{3/2}$ state and $^{2}D_{5/2}$ state of 0.17(1)% and 1.08(5)%, respectively, in rough agreement with theoretical predictions. Furthermore, we measured the isotope shifts of the $^{2}F_{7/2}\ensuremath{\rightarrow}^{1}D{[5/2]}_{5/2}$ transition and determine the hyperfine structure constant for the $^{1}D{[5/2]}_{5/2}$ state in $^{171}\mathrm{Yb}^{+}$ to be $A(^{1}D{[5/2]}_{5/2})=\ensuremath{-}107(6)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}$.

DOI: 10.1103/physreva.97.032511

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Single-ion spectroscopy of four metastable-state clear-out transitions in Yb + : Isotope shifts and hyperfine structure

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Measurement of the 2 S 1 / 2 − 2 D 5 / 2 clock transition in a single 171 Yb + ion

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Precision characterization of the D 5 / 2 2 state and the quadratic Zeeman coefficient in Yb + 171

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Precision spectroscopy of a trapped $^{173}$Yb$^+$ ion using a bath of ultracold atoms

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arXiv:1711.04667 · Physical Review A

Spectroscopy of the S1/22→P3/22 transition in Yb ii: Isotope shifts, hyperfine splitting, and branching ratios

Thomas Feldker, Henning A. Fürst, Norman Vincenz Ewald, J. Joger, R. Gerritsma

Published Mar 19, 2018• 15 citations

arXiv HTML PDF

Abstract

We report on spectroscopic results on the

^{2}S_{1/2}\ensuremath{\rightarrow}\phantom{\rule{0.16em}{0ex}}^{2}P_{3/2}

transition in single trapped

{\mathrm{Yb}}^{+}

ions. We measure the isotope shifts for all stable

{\mathrm{Yb}}^{+}

isotopes except

^{173}\mathrm{Yb}^{+}

, as well as the hyperfine splitting of the

^{2}P_{3/2}

state in

^{171}\mathrm{Yb}^{+}

. Our results are in agreement with previous measurements but are a factor of 5--9 more precise. For the hyperfine constant

A(^{2}P_{3/2})=875.4(10)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}

our results also agree with previous measurements but deviate significantly from theoretical predictions. We present experimental results on the branching ratios for the decay of the

^{2}P_{3/2}

state. We find branching fractions for the decay to the

^{2}D_{3/2}

state and

^{2}D_{5/2}

state of 0.17(1)% and 1.08(5)%, respectively, in rough agreement with theoretical predictions. Furthermore, we measured the isotope shifts of the

^{2}F_{7/2}\ensuremath{\rightarrow}^{1}D{[5/2]}_{5/2}

transition and determine the hyperfine structure constant for the

^{1}D{[5/2]}_{5/2}

state in

^{171}\mathrm{Yb}^{+}

to be

A(^{1}D{[5/2]}_{5/2})=\ensuremath{-}107(6)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}

DOI: 10.1103/physreva.97.032511

Related papers

High-Resolution Spectroscopy of $^{173}$ Yb $^{+}$ IonsHigh-Resolution Spectroscopy of $^{173}$Yb$^{+}$ Ions

J. Jiang, A. V. Viatkina, Saaswath JK +7 more

Compared to other stable isotopes of $\rm{Yb}^+$ , $^{173}\rm{Yb}^+$ has a richer hyperfine structure, which leads to more favorable clock transitions, spectroscopic techniques for probing new physics, and more sophisticated quantum computing architectures. However, to date, its electronic spectrum remains poorly characterized. Here, we report on efficient laser cooling, state preparation, and detection of a single trapped $^{173}\rm{Yb}^+$ ion. The previously unobserved $^2\!S_{1/2} \rightarrow {}^2\!D_{3/2}$ electric quadrupole transition at 436 nm is coherently excited, and the isotope shift between $^{171}\rm{Yb}^+$ and $^{173}\rm{Yb}^+$ on this transition is determined with an uncertainty of 1.4 Hz. Using microwave spectroscopy, we resolve the hyperfine structure (HFS) of the ${}^2\!D_{3/2}$ state with a relative uncertainty below $10^{-8}$ . From the HFS measurement data, we infer for ${}^{173}$ Yb a nuclear magnetic octupole moment $Ω= -0.062(8)\,({\rm b} \times μ_N)$ with uncertainty reduced by more than 2 orders of magnitude compared to previous studies. The data also allow us to determine hyperfine anomalies for the ${}^2\!S_{1/2}$ and ${}^2\!D_{3/2}$ states.Compared to other stable isotopes of $\rm{Yb}^+$, $^{173}\rm{Yb}^+$ has a richer hyperfine structure, which leads to more favorable clock transitions, spectroscopic techniques for probing new physics, and more sophisticated quantum computing architectures. However, to date, its electronic spectrum remains poorly characterized. Here, we report on efficient laser cooling, state preparation, and detection of a single trapped $^{173}\rm{Yb}^+$ ion. The previously unobserved $^2\!S_{1/2} \rightarrow {}^2\!D_{3/2}$ electric quadrupole transition at 436 nm is coherently excited, and the isotope shift between $^{171}\rm{Yb}^+$ and $^{173}\rm{Yb}^+$ on this transition is determined with an uncertainty of 1.4 Hz. Using microwave spectroscopy, we resolve the hyperfine structure (HFS) of the ${}^2\!D_{3/2}$ state with a relative uncertainty below $10^{-8}$. From the HFS measurement data, we infer for ${}^{173}$Yb a nuclear magnetic octupole moment $Ω= -0.062(8)\,({\rm b} \times μ_N)$ with uncertainty reduced by more than 2 orders of magnitude compared to previous studies. The data also allow us to determine hyperfine anomalies for the ${}^2\!S_{1/2}$ and ${}^2\!D_{3/2}$ states.

physics.atom-phCross-listedarXiv:2601.09585Physical Review LettersJan 15, 20261 citation

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N. A. Diepeveen, Clara Robalo Pereira, M. Mazzanti +5 more

We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of Yb $^+$ as well as their hyperfine structure in $^{171}$ Yb $^+$ . The strong $^2 \rm{D}_{3/2} \rightarrow {}^1[1/2]_{1/2}$ transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the $^3[3/2]_{3/2}$ state at 411 nm clears out the $^2 $F$ _{7/2}$ state, for which typically 638 nm or 760 nm are used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate Yb $^+$ and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^2 $D$ _{3/2} \rightarrow {}^3[1/2]_{3/2}$ at 399 nm, and $^2 $D$ _{3/2} \rightarrow {}^1[5/2]_{5/2}$ at 410 nm including decay branching ratios of the excited states.We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of Yb$^+$ as well as their hyperfine structure in $^{171}$Yb$^+$. The strong $^2 \rm{D}_{3/2} \rightarrow {}^1[1/2]_{1/2}$ transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the $^3[3/2]_{3/2}$ state at 411 nm clears out the $^2 $F$_{7/2}$ state, for which typically 638 nm or 760 nm are used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate Yb$^+$ and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^2 $D$_{3/2} \rightarrow {}^3[1/2]_{3/2}$ at 399 nm, and $^2 $D$_{3/2} \rightarrow {}^1[5/2]_{5/2}$ at 410 nm including decay branching ratios of the excited states.

arXiv:2408.07380Aug 14, 20240 citations

Single-ion spectroscopy of four metastable-state clear-out transitions in Yb + : Isotope shifts and hyperfine structure

N. A. Diepeveen, Clara Robalo Pereira, M. Mazzanti +5 more

We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of ${\mathrm{Yb}}^{+}$ as well as their hyperfine structure in $^{171}\mathrm{Yb}^{+}$ . The strong ${}^{2}{D}_{3/2}\ensuremath{\rightarrow}{}^{1}{[1/2]}_{1/2}$ transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the ${}^{3}{[3/2]}_{3/2}$ state at 411 nm clears out the $^{2}F_{7/2}$ state, for which typically 638 nm or 760 nm is used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate ${\mathrm{Yb}}^{+}$ and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{3}{[1/2]}_{3/2}$ at 399 nm and $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{1}{[5/2]}_{5/2}$ at 410 nm including decay branching ratios of the excited states.We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of ${\mathrm{Yb}}^{+}$ as well as their hyperfine structure in $^{171}\mathrm{Yb}^{+}$. The strong ${}^{2}{D}_{3/2}\ensuremath{\rightarrow}{}^{1}{[1/2]}_{1/2}$ transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the ${}^{3}{[3/2]}_{3/2}$ state at 411 nm clears out the $^{2}F_{7/2}$ state, for which typically 638 nm or 760 nm is used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate ${\mathrm{Yb}}^{+}$ and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{3}{[1/2]}_{3/2}$ at 399 nm and $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{1}{[5/2]}_{5/2}$ at 410 nm including decay branching ratios of the excited states.

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Measurement of the 2 S 1 / 2 − 2 D 5 / 2 clock transition in a single 171 Yb + ion

M. Roberts, P. Taylor, S. Gateva +3 more

Spectroscopy of the 411-nm transition in ${}^{171}{\mathrm{Yb}}^{+}$ has been performed and the feasibility of its use as an optical frequency standard has been demonstrated. The ${}^{2}{S}_{1/2}(F=0, {m}_{F}=0){--}^{2}{D}_{5/2}(F=2, {m}_{F}=0)$ frequency, at zero-magnetic field, has been measured to be 729 487 779 566(153) kHz. This transition is free from the first-order Zeeman shift and has a measured second-order shift of +0.38(8) Hz/(\ensuremath{\mu} ${\mathrm{T})}^{2}$ . In addition, the hyperfine structure of the ${}^{2}{D}_{5/2}$ level has been deduced by driving the other hyperfine components of the 411-nm transition, showing it to be inverted. The ${}^{2}{D}_{5/2}$ hyperfine splitting, measured to be -191(2) MHz, implies an A factor of -63.6(7) MHz. These data taken in conjunction with previous work yield an isotope shift of ${\ensuremath{\nu}}_{171}\ensuremath{-}{\ensuremath{\nu}}_{172}=+1317.1(1.3)\mathrm{MHz}$ for this transition between the 171 and 172 isotopes.Spectroscopy of the 411-nm transition in ${}^{171}{\mathrm{Yb}}^{+}$ has been performed and the feasibility of its use as an optical frequency standard has been demonstrated. The ${}^{2}{S}_{1/2}(F=0, {m}_{F}=0){--}^{2}{D}_{5/2}(F=2, {m}_{F}=0)$ frequency, at zero-magnetic field, has been measured to be 729 487 779 566(153) kHz. This transition is free from the first-order Zeeman shift and has a measured second-order shift of +0.38(8) Hz/(\ensuremath{\mu}${\mathrm{T})}^{2}$. In addition, the hyperfine structure of the ${}^{2}{D}_{5/2}$ level has been deduced by driving the other hyperfine components of the 411-nm transition, showing it to be inverted. The ${}^{2}{D}_{5/2}$ hyperfine splitting, measured to be -191(2) MHz, implies an A factor of -63.6(7) MHz. These data taken in conjunction with previous work yield an isotope shift of ${\ensuremath{\nu}}_{171}\ensuremath{-}{\ensuremath{\nu}}_{172}=+1317.1(1.3)\mathrm{MHz}$ for this transition between the 171 and 172 isotopes.

Physical Review AOct 1, 199959 citations

Precision characterization of the D 5 / 2 2 state and the quadratic Zeeman coefficient in Yb + 171

Ting Rei Tan, Claire Edmunds, Alistair R. Milne +2 more

We report measurements of the branching fraction, hyperfine constant, and second-order Zeeman coefficient of the ${D}_{5/2}$ level in $^{171}\mathrm{Yb}^{+}$ with up to a two-orders-of-magnitude reduction in uncertainty compared to previously reported values. We estimate the electric quadrupole reduced matrix element of the ${S}_{1/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}\phantom{\rule{4pt}{0ex}}{D}_{5/2}$ transition to be 12.5(4) $e{a}_{0}^{2}$ . Furthermore, we determine the transition frequency of the ${F}_{7/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}{\phantom{\rule{4pt}{0ex}}}^{1}D{[3/2]}_{3/2}$ at 760 nm with a $\ensuremath{\sim}$25-fold improvement in uncertainty. These measurements provide benchmarks for quantum-many-body atomic-physics calculations and provide valuable data for efforts to improve quantum information processors based on ${}^{171}{\text{Yb}}^{+}$ .We report measurements of the branching fraction, hyperfine constant, and second-order Zeeman coefficient of the ${D}_{5/2}$ level in $^{171}\mathrm{Yb}^{+}$ with up to a two-orders-of-magnitude reduction in uncertainty compared to previously reported values. We estimate the electric quadrupole reduced matrix element of the ${S}_{1/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}\phantom{\rule{4pt}{0ex}}{D}_{5/2}$ transition to be 12.5(4) $e{a}_{0}^{2}$. Furthermore, we determine the transition frequency of the ${F}_{7/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}{\phantom{\rule{4pt}{0ex}}}^{1}D{[3/2]}_{3/2}$ at 760 nm with a $\ensuremath{\sim}$25-fold improvement in uncertainty. These measurements provide benchmarks for quantum-many-body atomic-physics calculations and provide valuable data for efforts to improve quantum information processors based on ${}^{171}{\text{Yb}}^{+}$.

arXiv:2012.14187Physical Review AJul 30, 202118 citations

Precision spectroscopy of a trapped $^{173}$ Yb $^+$ ion using a bath of ultracold atomsPrecision spectroscopy of a trapped $^{173}$Yb$^+$ ion using a bath of ultracold atoms

Egor Kovlakov, Rene Gerritsma

We demonstrate precision laser spectroscopy of a trapped $^{173}$ Yb $^+$ ion that is not directly laser cooled by coupling it to ultracold atoms. The atomic bath continuously cools the internal degrees of freedom of the ion to its hyperfine ground state via spin-exchange collisions. Successful laser excitation is detected via state-selective charge transfer and subsequent ion loss. We probe the $6^2S_{1/2}\rightarrow 6^2P_{3/2}$ transition at 329 nm and measure the magnetic and electric hyperfine interaction constants for the $6^2P_{3/2}$ state to be $A=-241(1)$ MHz and $B=1460(8)$ MHz, respectively. Our results are in agreement with a previous measurement obtained in a hollow-cathode discharge experiment but are a factor of 6-9 more precise. The techniques demonstrated in this work may be extended to perform precision spectroscopy on other ions with complex level structures.We demonstrate precision laser spectroscopy of a trapped $^{173}$Yb$^+$ ion that is not directly laser cooled by coupling it to ultracold atoms. The atomic bath continuously cools the internal degrees of freedom of the ion to its hyperfine ground state via spin-exchange collisions. Successful laser excitation is detected via state-selective charge transfer and subsequent ion loss. We probe the $6^2S_{1/2}\rightarrow 6^2P_{3/2}$ transition at 329 nm and measure the magnetic and electric hyperfine interaction constants for the $6^2P_{3/2}$ state to be $A=-241(1)$ MHz and $B=1460(8)$ MHz, respectively. Our results are in agreement with a previous measurement obtained in a hollow-cathode discharge experiment but are a factor of 6-9 more precise. The techniques demonstrated in this work may be extended to perform precision spectroscopy on other ions with complex level structures.

physics.atom-phCross-listedarXiv:2603.21297Physical Review LettersMar 24, 20260 citations

We report on spectroscopic results on the

^{2}S_{1/2}\ensuremath{\rightarrow}\phantom{\rule{0.16em}{0ex}}^{2}P_{3/2}

transition in single trapped

{\mathrm{Yb}}^{+}

ions. We measure the isotope shifts for all stable

{\mathrm{Yb}}^{+}

isotopes except

^{173}\mathrm{Yb}^{+}

, as well as the hyperfine splitting of the

^{2}P_{3/2}

state in

^{171}\mathrm{Yb}^{+}

. Our results are in agreement with previous measurements but are a factor of 5--9 more precise. For the hyperfine constant

A(^{2}P_{3/2})=875.4(10)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}

our results also agree with previous measurements but deviate significantly from theoretical predictions. We present experimental results on the branching ratios for the decay of the

^{2}P_{3/2}

state. We find branching fractions for the decay to the

^{2}D_{3/2}

state and

^{2}D_{5/2}

state of 0.17(1)% and 1.08(5)%, respectively, in rough agreement with theoretical predictions. Furthermore, we measured the isotope shifts of the

^{2}F_{7/2}\ensuremath{\rightarrow}^{1}D{[5/2]}_{5/2}

transition and determine the hyperfine structure constant for the

^{1}D{[5/2]}_{5/2}

state in

^{171}\mathrm{Yb}^{+}

to be

A(^{1}D{[5/2]}_{5/2})=\ensuremath{-}107(6)\phantom{\rule{4pt}{0ex}}\mathrm{MHz}

High-Resolution Spectroscopy of

^{173}

^{+}

Ions

Compared to other stable isotopes of

\rm{Yb}^+

^{173}\rm{Yb}^+

has a richer hyperfine structure, which leads to more favorable clock transitions, spectroscopic techniques for probing new physics, and more sophisticated quantum computing architectures. However, to date, its electronic spectrum remains poorly characterized. Here, we report on efficient laser cooling, state preparation, and detection of a single trapped

^{173}\rm{Yb}^+

ion. The previously unobserved

^2\!S_{1/2} \rightarrow {}^2\!D_{3/2}

electric quadrupole transition at 436 nm is coherently excited, and the isotope shift between

^{171}\rm{Yb}^+

and

^{173}\rm{Yb}^+

on this transition is determined with an uncertainty of 1.4 Hz. Using microwave spectroscopy, we resolve the hyperfine structure (HFS) of the

{}^2\!D_{3/2}

state with a relative uncertainty below

10^{-8}

. From the HFS measurement data, we infer for

{}^{173}

Yb a nuclear magnetic octupole moment

Ω= -0.062(8)\,({\rm b} \times μ_N)

with uncertainty reduced by more than 2 orders of magnitude compared to previous studies. The data also allow us to determine hyperfine anomalies for the

{}^2\!S_{1/2}

and

{}^2\!D_{3/2}

states.

We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of Yb

^+

as well as their hyperfine structure in

^{171}

^+

. The strong

^2 \rm{D}_{3/2} \rightarrow {}^1[1/2]_{1/2}

transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the

^3[3/2]_{3/2}

state at 411 nm clears out the $^2

F

_{7/2}$ state, for which typically 638 nm or 760 nm are used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate Yb

^+

and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^2

D

_{3/2} \rightarrow {}^3[1/2]_{3/2}$ at 399 nm, and $^2

D

_{3/2} \rightarrow {}^1[5/2]_{5/2}$ at 410 nm including decay branching ratios of the excited states.

We present spectroscopic data for four metastable state clear-out transitions between 399 nm and 412 nm for all even long-lived isotopes of

{\mathrm{Yb}}^{+}

as well as their hyperfine structure in

^{171}\mathrm{Yb}^{+}

. The strong ${}^{2}{D}_{3/2}\ensuremath{\rightarrow}{}^{1}{[1/2]}_{1/2}$ transition at 412 nm represents an attractive alternative for the standard 935 nm repumper used in cooling and trapping experiments, while the transition to the

{}^{3}{[3/2]}_{3/2}

state at 411 nm clears out the

^{2}F_{7/2}

state, for which typically 638 nm or 760 nm is used. These two alternative transitions simplify the experimental setup by removing the need for infrared optics to cool and manipulate

{\mathrm{Yb}}^{+}

and may be of particular interest when considering integrated photonics solutions. We also present data for the transitions $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{3}{[1/2]}_{3/2}$ at 399 nm and $^{2}D_{3/2}\ensuremath{\rightarrow}{}^{1}{[5/2]}_{5/2}$ at 410 nm including decay branching ratios of the excited states.

Spectroscopy of the 411-nm transition in

{}^{171}{\mathrm{Yb}}^{+}

has been performed and the feasibility of its use as an optical frequency standard has been demonstrated. The

{}^{2}{S}_{1/2}(F=0, {m}_{F}=0){--}^{2}{D}_{5/2}(F=2, {m}_{F}=0)

frequency, at zero-magnetic field, has been measured to be 729 487 779 566(153) kHz. This transition is free from the first-order Zeeman shift and has a measured second-order shift of +0.38(8) Hz/(\ensuremath{\mu}

{\mathrm{T})}^{2}

. In addition, the hyperfine structure of the

{}^{2}{D}_{5/2}

level has been deduced by driving the other hyperfine components of the 411-nm transition, showing it to be inverted. The

{}^{2}{D}_{5/2}

hyperfine splitting, measured to be -191(2) MHz, implies an A factor of -63.6(7) MHz. These data taken in conjunction with previous work yield an isotope shift of ${\ensuremath{\nu}}_{171}\ensuremath{-}{\ensuremath{\nu}}_{172}=+1317.1(1.3)\mathrm{MHz}$ for this transition between the 171 and 172 isotopes.

We report measurements of the branching fraction, hyperfine constant, and second-order Zeeman coefficient of the

{D}_{5/2}

level in

^{171}\mathrm{Yb}^{+}

with up to a two-orders-of-magnitude reduction in uncertainty compared to previously reported values. We estimate the electric quadrupole reduced matrix element of the ${S}_{1/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}\phantom{\rule{4pt}{0ex}}{D}_{5/2}$ transition to be 12.5(4)

e{a}_{0}^{2}

. Furthermore, we determine the transition frequency of the ${F}_{7/2}\phantom{\rule{4pt}{0ex}}\ensuremath{\leftrightarrow}{\phantom{\rule{4pt}{0ex}}}^{1}D{[3/2]}_{3/2}$ at 760 nm with a $\ensuremath{\sim}$25-fold improvement in uncertainty. These measurements provide benchmarks for quantum-many-body atomic-physics calculations and provide valuable data for efforts to improve quantum information processors based on

{}^{171}{\text{Yb}}^{+}

Precision spectroscopy of a trapped

^{173}

^+

ion using a bath of ultracold atoms

We demonstrate precision laser spectroscopy of a trapped

^{173}

^+

ion that is not directly laser cooled by coupling it to ultracold atoms. The atomic bath continuously cools the internal degrees of freedom of the ion to its hyperfine ground state via spin-exchange collisions. Successful laser excitation is detected via state-selective charge transfer and subsequent ion loss. We probe the

6^2S_{1/2}\rightarrow 6^2P_{3/2}

transition at 329 nm and measure the magnetic and electric hyperfine interaction constants for the

6^2P_{3/2}

state to be

A=-241(1)

MHz and

B=1460(8)

MHz, respectively. Our results are in agreement with a previous measurement obtained in a hollow-cathode discharge experiment but are a factor of 6-9 more precise. The techniques demonstrated in this work may be extended to perform precision spectroscopy on other ions with complex level structures.