Absorption Spectrum of the ``Pink'' Afterglow of Nitrogen in the Vacuum Ultraviolet

摘要

The absorption spectrum of the shorthyphen;lived ``pink'' afterglow in nitrogen was photographed in the vacuum ultraviolet from 1600 to 1150 Aring;. A large number of relatively intense absorption bands were observed. It is suggested that these may result from transitions between the ground state (X1Sgr;g+) and several excited electronic states (b1IIu,bprime;1Sgr;u+, and others) in which groundhyphen;state vibrational levels of the ground electronic state are populated to very high levels (up to aboutvPrime;=20). It appears that more than 10 of the nitrogen molecules are excited to vibrational levels greater thanvPrime;=8.