RYDBERG ABSORPTION SERIES OF $H_{2}$ CONVERGING TO $v \geq 0$ LEVELS OF $H_{2}^{+}$.
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Date
1969
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Ohio State University
Abstract
The absorption spectrum of $H_{2}$ at liquid nitrogen temperature was further investigated with a 6.5 m vacuum spectrograph in the $600-800{\AA}$ region. Five distinct groups, each consisting of from 11 to 30 lines, were observed at wavelengths corresponding to levels $v = 0, 1, 2, 4,$ and 5 of $H_{2}^{+}$. Apparently, individual groups form Rydberg series. They converge to $124647 (v = 0), 126819 (v = 1), 128864 (v = 2), 132575 (v = 4)$, and $132270 cm^{-1} (v = 5)$. These values are very close to $K = 3$ level in the respective vibrational levels of $H_{2}^{+}$ if the lower level is assumed to be the $K = 1, v = 0$ of the $H_{2}$ ground state. Upon consideration of l-uncoupling these groups may be attributed to appropriate R(1) Rydberg series in np $\pi \leftarrow X$ transitions.
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Author Institution: Air Force Cambridge Research Laboratories, Office of Aerospace Research