Abstract.
X-ray spectra from nitrogen clusters irradiated with ultrashort laser pulses are reported. The line spectra of H-like and He-like nitrogen ions have been observed by irradiation with 100 fs, 800 nm pulses at 7×1017 W/cm2 irradiance. The generation of highly charged ions of N6+ and N7+ is explained by the optical field-induced ionization and the subsequent collisional ionizations in the clusters. The He-δline has anomalously high brightness compared to other He-like lines. It is ascribed to charge exchange, which preferentially populates the n=5 level of N5+.
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Received: 7 October 1999 / Published online: 23 February 2000
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Sagisaka, A., Honda, H., Kondo, K. et al. Observation of X-ray spectra from nitrogen clusters irradiated with high-intensity ultrashort laser pulses. Appl Phys B 70, 549–554 (2000). https://doi.org/10.1007/s003400050860
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DOI: https://doi.org/10.1007/s003400050860