Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..conferc09m&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Physics
Microwave (Rotational)
Scientific paper
By means of Fourier transform microwave spectroscopy of a supersonic beam, the fundamental rotational transition of isotopic and vibrationally-excited iminosilicon HNSi has been detected. In addition to seven isotopic species, vibrational satellite transitions from more than 30 vibrationally-excited states, including the three fundamental modes, have been detected. Those from v_2 are particularly intense, enabling detection of transitions from as high as (0,22^0,0) (i.e. ˜10,000 cm-1 above ground). At high spectral resolution, well-resolved nitrogen quadrupole structure has been observed in nearly every transition. Excitation of v_1 or v_3 changes eQq(N) little, but eQq(N) systematically decreases with increasing excitation of the v_2 bend, from a value of 0.376(5) MHz for (0,0^0,0) to -2.249(5) MHz for (0,20^0,0). With the large amount of new data in hand, it has been possible to determine more precise vibration-rotation constants and an improved semi-empirical structure for this triatomic molecule. An unsuccessful search for HSiN, a highly polar isomer calculated to lie nearly 3 eV above HNSi, is also reported.
McCarthy Mary C.
Tamassia Filippo
Thaddeus Patrick
Thorwirth Sven
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