Energy distributions of ions emitted from argon clusters Coulomb-exploded by intense femtosecond laser pulses

Journal Article · Tue Jun 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.063201· OSTI ID:20643778

Hirokane, M; Okada, S; Okihara, S; Sato, F; Iida, T ^[1]; Shimizu, S ^[2]; Hashida, M; Sakabe, S ^[3]

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1. Graduate School of Engineering, Osaka University, Suita Osaka 565-0871 (Japan)
2. Institute of Laser Engineering, Osaka University, Suita Osaka 565-0871 (Japan)
3. Institute for Chemical Research, Kyoto University, Gokasho Uji Kyoto 611-0011 (Japan)

Energy distributions of ions emitted from argon clusters (up to 12 800 atoms/cluster) Coulomb-exploded with an intense femtosecond laser have been experimentally studied. Under the laser intensity of 2x10{sup 16} W/cm{sup 2}, the ions of >15 keV are anisotropically emitted, while those lower than 15 keV tend to be isotropic. The argon ions of charge state up to Ar{sup 14+} were generated, and their high charge state is more than expected by the barrier suppression ionization model. The yield and maximum energy of Ar{sup 8+}-Ar{sup 14+} ions depend on laser polarization direction, while those of Ar{sup +}-Ar{sup 7+} are much less sensitive to the laser polarization. The present results suggests that high-charge-state and anisotropically emitted ions are produced by impact ionization of electrons that are produced by optical field ionization with the intense laser.

• OSTI ID: 20643778
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOMIC CLUSTERS
ATOMS
CHARGE STATES
DISSOCIATION
ELECTRON-ATOM COLLISIONS
ELECTRONS
EMISSION
ENERGY SPECTRA
IONIZATION
KEV RANGE
LASER RADIATION
POLARIZATION
PULSES
VISIBLE RADIATION
YIELDS