Far-infrared-laser magnetic-resonance spectroscopy of (4)He S and P states.
A CO(2)-pumped far-infrared (FIR) laser has been used to drive transitions between S and P levels of (4)He Rydberg states with the same principal quantum number (n). The levels are tuned to resonance with the fixed-frequency FIR laser through application of an intense magnetic field. Measurements of such transitions are particularly valuable as they provide high-resolution data for low L states, a previously ill-defined area in the otherwise wellknown energy-level structure of (4)He.
Rosenbluh
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Lax
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Panock
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Miller
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