title: [A measurement of optical emission from the rear surface with solid targets irradiated by ultrashort pulse laser].
abstract: The integrated image spectrum and scattering light spectrum of optical emission at normal direction from rear-side of a metallic foil were measured, employing optical CCD camera and OMA optical multi-channel spectrometer. The integrated image spectrum shows that it presents a ring-shape, and in the near margin of the ring-shape a bright localized signal is shown, which is optical transition radiation (OTR) generated by hot electrons transport through solid targets. The scattering spectrum shows that it presents a series of nonperiodic sharp spikes between 300-500 nm, and the sharp spike is ascribed to the coherent transition radiation (CTR) generated by bunches of hot electron beams generated in v x B acceleration mechanism near 400 nm (2 omega). The intensity of transition radiation decreases with the increase of the target thickness.
authors.affiliation: Teaching and Research Section of Physics, Chengdu Medical College, Chengdu 610081, China.
authors.forename: Guang-Chang
authors.initials: GC
authors.lastname: Wang
authors.forename: Zhi-Jian
authors.initials: ZJ
authors.lastname: Zheng
authors.forename: Xiang-Dong
authors.initials: XD
authors.lastname: Yang
authors.forename: Yu-Qiu
authors.initials: YQ
authors.lastname: Gu
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Liu
authors.forename: Tian-Shu
authors.initials: TS
authors.lastname: Wen
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Ge
authors.forename: Chun-Ye
authors.initials: CY
authors.lastname: Jiao
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Zhou
authors.forename: Shuang-Gen
authors.initials: SG
authors.lastname: Zhang
authors.forename: Xiang-Xian
authors.initials: XX
authors.lastname: Wang