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Rydberg states of HD
Sander Kim
Ph.D. Thesis, Harvard University, 1993, 106 pages export citation
The triplet nf Rydberg states of HD with n = 9-17, L = 3, v = 1, and
R = 1,3
have been observed and identified with the laser-molecular beam
method. A
20 eV electron beam excites a collimated HD beam to the
metastable 2p3PI
state. Two counterpropagating cw single-frequency laser beams
excite the
metastable molecule first to the intermediate 3d3PI state, then to a
triplet nf
Rydberg state. The transition frequencies between the 3d and nf
states have
been measureed to an accuracy of 0.02 cm-1. The
long range model gives
the transition frequencies to an accuracy of approximately 0.1 cm
-1. Using
these energy level measurements, the ionization potential of the
metastable
state has been determined to be 27 460.98(30) cm-1
and the energy
difference between the triplet metastable and singlet ground state
has been
determined to be 97 105.50(30) cm-1. In addition, the
linewidths of the
triplet Rydberg states have been measured, giving the
autoionization rates.
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