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- W31354179 abstract "This chapter describes a –laser-atomic-beam experiment in which the 4 He fine structure and 3 He hyperfine structure as well as the isotope shift between 3 He and 4 He in the ls2s 3 S 1 → lsnp were measured. The isotope shift in some ls2s 1 S 0 → lsnp transitions was also determined and the linear Stark effect in lsnp 1,3 P Rydberg states of 4 He was studied. In an experiment described in the chapter, a beam of metastable helium atoms was produced by DC electric charge in an expanding, isotopically enriched gas mixture of 3 He and 4 He. To reduce Doppler effects, a collimated beam was intersected perpendicularly with the focused light of an intracavity frequency-doubled CW ring dye laser. Tunable, narrow-band UV laser radiation in the wave-length region was produced using various nonlinear crystals and dyes. For n 10 He ions were detected with a quadrupole mass filter. Atomic and laser beams were intersected in a metal-shielding box to ensure field-free excitation for the studies of fine and hyperfine structure and isotope shifts. Two capacitor plates were mounted inside this box for the Stark-effect investigations." @default.
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- W31354179 date "1989-01-01" @default.
- W31354179 modified "2023-09-27" @default.
- W31354179 title "UV Laser Spectroscopy of 3,4He Rydberg Series" @default.
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- W31354179 doi "https://doi.org/10.1016/b978-0-12-251930-7.50099-6" @default.
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