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    ISSN: 1434-6079
    Keywords: 33.20.Kf ; 33.80.Rv ; 35.20.Sd ; 42.62.Fi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Rotational-vibrational transitions of the triplet system 13Σ g + ← 13Σ u + of the Na2 molecule have been investigated around $$\bar v = 13970 cm^{ - 1} $$ by Doppler-free polarization spectroscopy in a heat pipe and by resonant two-step photoionization in a collimated cold argon beam, seeded with sodium vapor. The fine- and hyperfine structure of the transitions is partly resolved. The analysis of the measured spectra and a theoretical discussion of the expected multiplet structure yields the rotational constantsB′ v (v′=17)=0.0866(4) cm−1 for the upper andB″ v (v″=0)=0.0533(4) cm−1 for the lower state. The difference Δb=b(3Σ u )−b(3Σ g ) of the hyperfine coupling constantsb turns out to be Δb=80 MHz.
    Type of Medium: Electronic Resource
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