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Tungsten monocarbide, WC: Pure rotational spectrum and 13C hyperfine interaction
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Image of FIG. 1.
FIG. 1.

The X 3Δ1(v = 0) J = 1 ← J = 2 pure rotational spectra for 186W12C (bottom) and 184W12C (top) and associated energy levels. Both electric (e/fe/f) and magnetic dipole (e/ff/e) transitions are observed with comparable intensity because of the high microwave power (∼10 mW) and long interaction time (∼30 μs) achieved by using a seeded argon beam.

Image of FIG. 2.
FIG. 2.

Field-free, high resolution, LIF spectra in the region of the R(2), Q(3), and P(4) lines of the [17.6]2X 3Δ1(1,0) band for 186W13C and associated energy levels. The three features have a common upper energy rotational terminus. The nearly identical splitting demonstrates that the magnetic hyperfine interaction in the X 3Δ1(v = 0) is negligible.


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Table I.

Observed and calculated frequencies for the X 3Δ1(v = 0) J = 2 ← J = 1 pure rotational transition.a

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Table II.

Observed and calculated line positions of the [17.6]2 ← X 3Δ1(1,0) band system of W13C.a

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Table III.

The [17.6]2(v = 1) W13C hyperfine splittings.a

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Table IV.

The rotational and Ω-doubling parameters for X 3Δ1 (υ = 0) state of W12C determined by pure rotational spectrum.

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Table V.

Experimentally determined and predicted B-values the [17.6]2X 3Δ1 (1,0) band system of W13Ca.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tungsten monocarbide, WC: Pure rotational spectrum and 13C hyperfine interaction