25MgCCH
Magnesium monoacetylide, X 2Σ+, 25Mg isotopolog
Species tag 050520
Version1*
Date of EntryMay 2024
ContributorH. S. P. Müller

The lines were reported by
(1) P. B. Changala, N. Genossar-Dan, E. Brudner, T. Gur, J. H. Baraban, and M. C. McCarthy, 2023, Proc. Natl. Acad. Sci. USA 120, Art. No. e2303586120.
Several parameters were evaluated from the main isotopolog.
The calculation may be sufficiently accurate up to 50 GHz; some caution may be advisable at higher frequencies.
The dipole moment of the main isotopolog was taken from a quantum-chemical calculation by
(2) D. E. Woon, 1996, Astrophys. J. 456, 602.

Lines Listed488
Frequency / GHz< 120
Max. J12
log STR0-8.3
log STR1-5.0
Isotope Corr. 
Egy / cm–10.0
 µa / D1.68
 µb / D 
 µc / D 
 A / MHz 
 B / MHz4875.31
 C / MHz 
 Q(300.0)30813.2718
 Q(225.0)23104.9918
 Q(150.0)15401.0753
 Q(75.00)7701.5206
 Q(37.50)3853.3804
 Q(18.75)1929.7243
 Q(9.375)968.0095
 Q(5.000)519.2518
 Q(2.725)285.9373
detected in ISM/CSMno


Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schlöder