Theoretical XANES spectra for C76 isomers

Two isolated pentagon rule satisfying isomers of C76 are optimized. And 1（D2） isomer is reconfirmed to be the relative more stable one. The X-ray absorption near-edge structure （XANES） spectra are theoretically characterized by the hybrid density functional theory （DFT） method in combination with the full core-hole potentials. Isomer identification of XANES spectra for Cr6 is found and XANES spectra dependence on local structure of fullerene is discussed.     

美以“喀秋莎盾”激光武器项目悄然下马

据报道,在经历了长达10年研制过程,花费了3亿多美元后,美国和以色列悄无声息地搁置了“喀秋莎盾”激光武器研究计划。该项激光武器计划被搁置的主要原因是这种武器体积庞大、成本高昂,在战场上的预期效果却不尽如人意。参与启动这项计划的美国前五角大楼官员彭罗斯·奥尔布赖特