Descendant of the X-ogen carrier and a "mass of 69": Infrared action spectroscopic detection of HC${}_3$O${}^{+}$ and HC${}_3$S${}^{+}$

S. Thorwirth, M. E. Harding, O. Asvany +6

The carbon chain ions HC${}_3$O${}^{+}$ and HC${}_3$S${}^{+}$ - longer variants of the famous "X-ogen" line carrier HCO${}^{+}$ - have been observed for the first time using two cryogenic 22-pole…