Influence of distances between the lens and the target on the characteristic of laser induced lead plasmaC.Y. Diao, C.S. Chen, B.Y. Man, C. Wang and H.B. FuEur. Phys. J. D, 63 1 (2011) 123-128DOI: https://doi.org/10.1140/epjd/e2011-10394-y