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Gamma-Rays Generated from Plasmas in the Interaction of Solid Targets with Femtosecond Laser Pulses |
| HE Jing-tang1;ZHANG Ping1,2;CHEN Duan-bao1;LI Zu-hao1;ZHANG Ying2;WANG Long2;FENG Bao-hua2;ZHANG Xiu-lan2;WEI Zhi-yi2;LI Zan-liang2;TANG Xiao-wei1;ZHANG Jie2,3 |
| 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
2Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
3Department of Physics, University of Oxford, OX1 3PU, UK
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| Cite this article: |
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HE Jing-tang, ZHANG Ping, CHEN Duan-bao et al 1998 Chin. Phys. Lett. 15 816-818 |
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Abstract The γ-rays with energies up to 300keV have been observed from plasmas produced by femtosecond laser pulses at a focused intensity of 5 x 1015 W.cm-2.μm2 irradiating Ta, Mo, and Cu targets. By introducing an 8% prepulse of 70ps before the main pulse, the fraction of high energy γ-ray photons (hv >l00keV) was significantly enhanced relative to low energy photons (hv < 100 keV).
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| Keywords:
52.25.Nr
42.65.Re
52.50.Jm
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Published: 01 November 1998
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52.25.Nr
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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52.50.Jm
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(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
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