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/f ↔ e/f) and magnetic dipole (e/f ↔ f/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.
Field-free, high resolution, LIF spectra in the region of the R(2), Q(3), and P(4) lines of the [17.6]2← X 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.
Observed and calculated frequencies for the X 3Δ1(v = 0) J = 2 ← J = 1 pure rotational transition.a
Observed and calculated line positions of the [17.6]2 ← X 3Δ1(1,0) band system of W13C.a
The [17.6]2(v = 1) W13C hyperfine splittings.a
The rotational and Ω-doubling parameters for X 3Δ1 (υ = 0) state of W12C determined by pure rotational spectrum.
Experimentally determined and predicted B-values the [17.6]2← X 3Δ1 (1,0) band system of W13Ca.
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