a Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; b College of Physical Science, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
Abstract Absolute optical oscillator strength density and double differential cross section spectra of CO below 120 eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the momentum transfer square $K^2$ increases. The doubly excited Rydberg states converging to $C~^2\Sigma^+$, $D~^2\Pi$, and $F~^2\Pi$ states of CO$^+$, respectively, are confirmed in our spectra. Another peak at around 32 eV is assigned to the transition of $(3\sigma)^{-1}(2\pi)^1~^1\Pi\leftarrow~X^1\Sigma^+ $.
Received: 22 April 2005
Revised: 08 August 2005
Accepted manuscript online:
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
