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Laser Energy Scaling Law for the Yield of Neutrons Generated by Intense Femtosecond Laser-Cluster Interactions

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Figure

Fig. 1(a) Energy distribution of ions emitted from a cluster, as obtained by using a spherical ion cluster model, (b) energy distribution ofions emitted from clusters irradiated with 100 fs pulses with intensity of 1.6×1016 W/cm2 for different levels of the back pressurefor generating clusters (higher pressure produces larger clusters) [6].
Fig. 3The configuration of the clusters in the focal volume of the laser. The clusters are displaced with the interspace of the laserwavelength to neighbor clusters, therefore the coupling efficiency of a laser pulse to the cluster gas is assumed to be 1.
Fig. 4Comparison between the present scaling law and the ex-perimental results reported in [10] (open squares (35 fslaser pulses)) and [11] (circles (100 fs) and close squares(1 ps)) with regard to the dependence of the neutron yieldon the laser energy
Fig. 5Laser energy scaling laws for the yield of neutrons.

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