Abstract: A slow neutron detection device is disclosed, comprising: a first slow neutron converter and a second slow neutron converter, and a readout electrode wire set and cathode wire sets arranged between the first slow neutron converter and the second slow neutron converter. By arranging a readout circuit between the two slow neutron converters, an electron drift distance is reduced by half without changing a dimension of the detection device, and an average over-threshold probability of a signal is increased.

Abstract: A method of creating holographic image on printed surface including the following steps: A. selecting a basis material; B. printing conventional printing pattern layer upon thed basis material layer; C. coating a transparent medium of holographic coating layer used to create holographic pattern upon the surface of printed pattern layer, wherein the medium is transparent thermoplastic material containing solvent type copolymerised resin; the holographic coating layer is produced by the holographic coated medium heated and dried by the infrared; and D. embossing the material with holographic coating layer by heating installing dolographic form on the outer surface of the form roller of the embossing machine; when the material with holographic coating layer is conveyed to the embossing machine, the holographic coating layer is embossed and the holographic image is produced under the pressure of the holographic form while the holographic coating layer is softened by heat.