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1.
The 0-0, 1-1, 2-2, and 3-3 bands of the A2Π-X2Σ+ transition of the tritiated beryllium monohydride molecule have been observed at 5000 Å in emission using a beryllium hollow-cathode discharge in a He + T2 mixture. The rotational analysis of these bands yields the following principal molecular constants. From the pure electronic energy difference (EΠ - EΣ)BeT = 20 037.91 ± 1.5 cm?1 and the corresponding previously known values for BeH and BeD, the following electronic isotope shifts are derived and related to the theoretical approach given by Bunker to the problem of the breakdown of the Born-Oppenheimer approximation. 相似文献
2.
Two new systems of emission bands near 2100 and 3100 Å have been produced by a microwave discharge in B2S3 vapor. From the known X2Σ+ and A2Πi states of BS, these systems have been assigned as E2Σ+ → X2Σ+ and E2Σ+ → A2Πi. Constants in cm?1 for the new state are , 相似文献
3.
The reactions of mixtures of halogen atoms (F + (Cl or Br)) with molecular azides produce banded emissions in the visible and near-infrared regions of the spectrum. The observed features correspond to b1Σ+ → X3Σ? and a1Δ → X3Σ? transitions, respectively, in NCl and NBr. The data obtained represent the first spectroscopic observation of the a1Δ states of these molecules. The molecular constants of the a1Δ states were determined to have the following values:
NCl | NBr | |||
9260 ± 10 cm?1 | 9226 ± 10 cm?1 | |||
904 ± 6 cm?1 | 763 ± 4 cm?1 | |||
4.7 ± 1.2 cm?1 | 2.4 ± 1.6 cm?1 |
13 517.2 (1.3) | 0.1434 (0.0027) | |||
153.6 (1.1) | 9×10?5 (4×10?4) | |||
0.47 (0.09) | 3.20 (0.03) Å | |||
7.85 (0.60) | 0.19 (0.16) |
20195.23 | 29.10 | 0.00891 | 5.340733 | |
(1) | 13913.42 | 18.44 | 0.00781 | 5.697722 |
0 | 15 958.41 (10) | 16 383.137 (6) | |
285.732 (9) | 288.56 (20) | 285.747 (9) | |
0.840 (4) | — | 0.954 (4) | |
0.094466141 (30) | 0.0957343 (20) | 0.0965151 (20) | |
0.000403551 (40) | 0.0004327 (20) | 0.0004483 (15) | |
(spin-rot.) | 0.00301484 (50) | — | 0.068767 (79) |
— | ?0.066834 (64) | — | |
— | 59.175 (1) | — |
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