McKenna P, Ledingham K W D, Yang J M, Robson L, McCanny T, Shimizu S, Clarke R J, Neely D, Spohr K, Chapman R, Singhal R P, Krushelnick K, Wei M S, Norreys P A
Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Sep;70(3 Pt 2):036405. doi: 10.1103/PhysRevE.70.036405. Epub 2004 Sep 21.
Proton and heavy ion acceleration in ultrahigh intensity ( approximately 2 x 10(20) W cm(-2) ) laser plasma interactions has been investigated using the new petawatt arm of the VULCAN laser. Nuclear activation techniques have been applied to make the first spatially integrated measurements of both proton and heavy ion acceleration from the same laser shots with heated and unheated Fe foil targets. Fe ions with energies greater than 10 MeV per nucleon have been observed. Effects of target heating on the accelerated ion energy spectra and the laser-to-ion energy conversion efficiencies are discussed. The laser-driven production of the long-lived isotope (57 )Co (271 days) via a heavy ion induced reaction is demonstrated.
利用VULCAN激光的新型拍瓦级装置，研究了超高强度（约2×10²⁰W/cm²）激光与等离子体相互作用中的质子和重离子加速。已应用核活化技术首次对加热和未加热的铁箔靶在同一激光脉冲下的质子和重离子加速进行空间积分测量。观测到了每核子能量大于10 MeV的铁离子。讨论了靶加热对加速离子能谱和激光到离子的能量转换效率的影响。展示了通过重离子诱导反应由激光驱动产生长寿命同位素⁵⁷Co（半衰期271天）的过程。
