Hyperfine structures of the nd /sup 1/D(n = 3 - 8) states of /sup 3/He I

Technical Report · Thu Jan 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6427786· OSTI ID:6427786

Brooks, R L; Streif, V F; Berry, H G

We have used the beam-foil quantum beat method to measure the hyperfine structure separations F = 3/2 - 5/2 of the 1snd /sup 1/D states (n = 3 - 8) of /sup 3/He I. We observed the single frequency modulated decay curves of the 1s2p /sup 1/P - 1snd /sup 1/D transitions for times after excitation up to 50 ns, corresponding to 4 to 5 modulation periods. The frequencies obtained (with a precision of 2 to 5%) are compared with other experiments and theory. The frequencies are determined mainly by the singlet-triplet energy separations and mixing factors for the He I D-states. The results agree with the same parameters obtained from other recent level-crossing measurements in strong magnetic field mixing of the singlet-triplet states.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6427786
• Report Number(s): CONF-810868-6; ON: DE83007931
• Country of Publication: United States
• Language: English

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74 ATOMIC AND MOLECULAR PHYSICS
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ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FINE STRUCTURE
HELIUM 3
HELIUM ISOTOPES
HYPERFINE STRUCTURE
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ION SPECTROSCOPY
ISOTOPES
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NUCLEI
NUMERICAL DATA
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