Abstract In this paper, the dependence of the photoionization cross section $\sigma$2, total ion number Ni and the FWHM of photoionization spectral line in resonant multiphoton ionization processes (RMPI) upon the parameter C of the laser transverse spatial distribution has been studied. Considering the effects of spatial coordinate on the resonant multiphoton absorption cross section $\sigma$1, the limited dimension of the laser-molecular interaction volume and threshold of laser intensity for RMPI, we deduce the expression of $\sigma$2 vs the parameter C. We calculated the value of $\sigma$2 for (2+2)PI of benzene by numerical method, and com-pared the result with that obtained by Bruzzeste et al. In additon, we also present the total ion number of photoionization and the FWHM of photoionization spectral line as a function of the parameter C.
Received: 11 August 1992
Accepted manuscript online:
PACS:
33.80.Rv
(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
LIN MEI-RONG (林美荣), CHEN WEN-JU (陈文驹), ZHANG BAO-ZHENG (张包铮), LIU YAO-MING (刘耀明), LI LIN-FENG (李林枫) EFFECT OF THE LASER TRANSVERSE SPATIAL DISTRIBUTION ON MULTIPHOTON IONIZATION PROCESSES 1993 Acta Physica Sinica (Overseas Edition) 2 345
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.