The Stark shift of the (6s ${)}^{2}$ $^{1}$ ${\mathit{S}}_{0}$ \ensuremath{\rightarrow}(6s6p ${)}^{1}$ ${\mathit{P}}_{1}$ transition in barium was measured using a laser to excite an atomic beam as it traversed a uniform electric field and a field-free region. The laser frequency was scanned across the transition while fluorescence produced by the radiative decay of the excited state was detected. The frequency scan was calibrated using an acousto-optic modulator which frequency shifted the laser by a specified amount. The Stark-shift rate was found to be -28.532\ifmmode\pm\else\textpm\fi{}0.060 kHz/(kV/cm ${)}^{2}$ . The hyperfine splitting of the $^{135,137}\mathrm{Ba}$ F=1/2 level relative to $^{138}\mathrm{Ba}$ of the (6s6p ${)}^{1}$ ${\mathit{P}}_{1}$ state was determined to be -549.47\ifmmode\pm\else\textpm\fi{}0.12 MHz, where the minus sign indicates that the $^{138}\mathrm{Ba}$ transition is at a lower frequency.The Stark shift of the (6s${)}^{2}$ $^{1}$${\mathit{S}}_{0}$\ensuremath{\rightarrow}(6s6p${)}^{1}$${\mathit{P}}_{1}$ transition in barium was measured using a laser to excite an atomic beam as it traversed a uniform electric field and a field-free region. The laser frequency was scanned across the transition while fluorescence produced by the radiative decay of the excited state was detected. The frequency scan was calibrated using an acousto-optic modulator which frequency shifted the laser by a specified amount. The Stark-shift rate was found to be -28.532\ifmmode\pm\else\textpm\fi{}0.060 kHz/(kV/cm${)}^{2}$. The hyperfine splitting of the $^{135,137}\mathrm{Ba}$ F=1/2 level relative to $^{138}\mathrm{Ba}$ of the (6s6p${)}^{1}$${\mathit{P}}_{1}$ state was determined to be -549.47\ifmmode\pm\else\textpm\fi{}0.12 MHz, where the minus sign indicates that the $^{138}\mathrm{Ba}$ transition is at a lower frequency.

Physical Review AMay 1, 199511 citations

The Stark shift of the (6s

{)}^{2}

^{1}

{\mathit{S}}_{0}

\ensuremath{\rightarrow}(6s6p

{)}^{1}

{\mathit{P}}_{1}

transition in barium was measured using a laser to excite an atomic beam as it traversed a uniform electric field and a field-free region. The laser frequency was scanned across the transition while fluorescence produced by the radiative decay of the excited state was detected. The frequency scan was calibrated using an acousto-optic modulator which frequency shifted the laser by a specified amount. The Stark-shift rate was found to be -28.532\ifmmode\pm\else\textpm\fi{}0.060 kHz/(kV/cm

{)}^{2}

. The hyperfine splitting of the

^{135,137}\mathrm{Ba}

F=1/2 level relative to

^{138}\mathrm{Ba}

of the (6s6p

{)}^{1}

{\mathit{P}}_{1}

state was determined to be -549.47\ifmmode\pm\else\textpm\fi{}0.12 MHz, where the minus sign indicates that the

^{138}\mathrm{Ba}

transition is at a lower frequency.