| Issue |
A&A
Volume 425, Number 2, October II 2004
|
|
|---|---|---|
| Page(s) | 767 - 772 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361:20040532 | |
| Published online | 21 September 2004 | |
Millimeter-wave spectroscopy of HC5N in vibrationally excited
states below
500 cm
*
1
I. Physikalisches Institut, Universität zu Köln, Zülpicherstraße 77, 50937 Cologne, Germany
2
Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy e-mail: claudio.degliesposti@unibo.it;bizzo@ciam.unibo.it
3
Institut Für Physikalische Chemie, Universität Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
Received:
26
March
2004
Accepted:
3
June
2004
The rotational spectrum of the semistable HC5N molecule has
been investigated in the millimeter-wave region for eight excited bending
states which lie below 500 cm-1, namely 
, and 4,
, 
, (
, 
), and (, 
).
Transitions up to 
were measured, reaching a frequency
as high as 270 GHz.
The set of spectroscopic constants determined in the present work makes it possible
to predict with much improved accuracy the transition frequencies of millimeter-wave
lines produced by vibrationally excited HC5N in hot core molecular sources and
circumstellar shells.
In addition, results of extensive CCSD(T) calculations are presented,
which yield accurate term values for low-lying bending vibrational states.
Key words: molecular data / methods: laboratory / techniques: spectroscopic / radio lines: ISM
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.