IONIZATION DETECTION OF LASER DRIVEN TRANSITIONS TO HIGH RYDBERG STATES OF $He_{2}$

R. L. Panock, Richard R. Freeman, Terry A. Miller, Storz, R. H.

Published Jan 1, 1980• 0 citations

Abstract

We have observed transitions from the metastable state to high rydberg states (=10-25) of $He_{2}$. These transitions are detected by collisional ionization the efficiency of which is roughly $constant^{(1)}$ with increasing principle quantum number. This technique is thus well suited for the study of highly excited states states which connot be examined with classical optical $methods^{(2)}$.

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IONIZATION DETECTION OF LASER DRIVEN TRANSITIONS TO HIGH RYDBERG STATES OF $He_{2}$ IONIZATION DETECTION OF LASER DRIVEN TRANSITIONS TO HIGH RYDBERG STATES OF $He_{2}$

R. L. Panock, Richard R. Freeman, Terry A. Miller, Storz, R. H.

Published Jan 1, 1980• 0 citations

OpenAlex

Abstract

We have observed transitions from the metastable state to high rydberg states (=10-25) of

He_{2}

. These transitions are detected by collisional ionization the efficiency of which is roughly

constant^{(1)}

with increasing principle quantum number. This technique is thus well suited for the study of highly excited states states which connot be examined with classical optical

methods^{(2)}

Related papers

Rydberg atom spectroscopy enabled by blackbody radiation ionization

Xiaoxu Lu, Yuan Sun, Harold J. Metcalf

We have excited helium atoms from their metastable 2 ${}^{3}\phantom{\rule{-0.16em}{0ex}}S$ state to Rydberg states in the range $13<n<50$ in a two-step process via the 3 ${}^{3}\phantom{\rule{-0.16em}{0ex}}P$ state using light at $\ensuremath{\lambda}=389$ nm and 785--815 nm. Atoms in a thermal beam (100 K) cross partially overlapping laser beams of the appropriate frequencies in the counterintuitive order to exploit the high efficiency of stimulated rapid adiabatic passage. The interaction region is between two plates that can be used for Stark tuning in a few V/cm field or for field ionization. At fields much too low for field ionization, we observe signals attributed to ionization by blackbody radiation. Multiple tests confirm this attribution as the cause of ionization. For example, by heating the plates we observe the expected signal increases. Our experiments reinforce previous work where the interaction between Rydberg atoms and room temperature blackbody radiation is important for experiments.We have excited helium atoms from their metastable 2 ${}^{3}\phantom{\rule{-0.16em}{0ex}}S$ state to Rydberg states in the range $13<n<50$ in a two-step process via the 3 ${}^{3}\phantom{\rule{-0.16em}{0ex}}P$ state using light at $\ensuremath{\lambda}=389$ nm and 785--815 nm. Atoms in a thermal beam (100 K) cross partially overlapping laser beams of the appropriate frequencies in the counterintuitive order to exploit the high efficiency of stimulated rapid adiabatic passage. The interaction region is between two plates that can be used for Stark tuning in a few V/cm field or for field ionization. At fields much too low for field ionization, we observe signals attributed to ionization by blackbody radiation. Multiple tests confirm this attribution as the cause of ionization. For example, by heating the plates we observe the expected signal increases. Our experiments reinforce previous work where the interaction between Rydberg atoms and room temperature blackbody radiation is important for experiments.

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IONIZATION DETECTION OF LASER DRIVEN TRANSITIONS TO HIGH RYDBERG STATES OF

He_{2}

We have observed transitions from the metastable state to high rydberg states (=10-25) of

He_{2}

. These transitions are detected by collisional ionization the efficiency of which is roughly

constant^{(1)}

with increasing principle quantum number. This technique is thus well suited for the study of highly excited states states which connot be examined with classical optical

methods^{(2)}

We have excited helium atoms from their metastable 2

{}^{3}\phantom{\rule{-0.16em}{0ex}}S

state to Rydberg states in the range

13<n<50

in a two-step process via the 3

{}^{3}\phantom{\rule{-0.16em}{0ex}}P

state using light at $\ensuremath{\lambda}=389$ nm and 785--815 nm. Atoms in a thermal beam (100 K) cross partially overlapping laser beams of the appropriate frequencies in the counterintuitive order to exploit the high efficiency of stimulated rapid adiabatic passage. The interaction region is between two plates that can be used for Stark tuning in a few V/cm field or for field ionization. At fields much too low for field ionization, we observe signals attributed to ionization by blackbody radiation. Multiple tests confirm this attribution as the cause of ionization. For example, by heating the plates we observe the expected signal increases. Our experiments reinforce previous work where the interaction between Rydberg atoms and room temperature blackbody radiation is important for experiments.