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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 4, Iss. 4 — Apr. 1, 2006
  • pp: 189–191

Size dependence of the maximum energy of protons from Coulomb explosion of methane clusters under intense femtosecond laser irradiation

Li Zheng, Cheng Wang, Shaohui Li, Bingchen Liu, Guoquan Ni, Ruxin Li, and Zhizhan Xu  »View Author Affiliations


Chinese Optics Letters, Vol. 4, Issue 4, pp. 189-191 (2006)


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Abstract

An investigation of the cluster size dependence of the maximum energy of protons ejected from explosion of methane clusters in an intense femtosecond laser field has been conducted on the basis of the cluster size estimation by Rayleigh scattering measurements. The interaction of a 2*10^(16)-W/cm2 intense laser pulse (790 nm, 60 fs) with the methane clusters revealed that the clusters were Coulomb exploded and the maximum energy (E_(max)) of the protons produced was linearly proportional to the square of the cluster radius (r_(c)^(2)). In a cluster size range, with the methane cluster radii up to about 3 nm, the established relation of E_(max) and r_(c)^(2) was found to be E_(max) (keV) = 3.3+0.75r_(c)^(2) (nm2), in good agreement with the simulation results. This demonstrated that Coulomb explosion of ionic clusters (C^(+4)H^(+)_(4))_(n) took place following the cluster vertical ionization in the laser-cluster interaction.

© 2005 Chinese Optics Letters

OCIS Codes
(020.2070) Atomic and molecular physics : Effects of collisions
(320.2250) Ultrafast optics : Femtosecond phenomena
(350.5400) Other areas of optics : Plasmas

Citation
Li Zheng, Cheng Wang, Shaohui Li, Bingchen Liu, Guoquan Ni, Ruxin Li, and Zhizhan Xu, "Size dependence of the maximum energy of protons from Coulomb explosion of methane clusters under intense femtosecond laser irradiation," Chin. Opt. Lett. 4, 189-191 (2006)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-4-4-189


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