Abstract: A method and an apparatus for generating X-rays in which continuous X-rays can be generated by irradiating a focused laser in the air using a liquid as a target, thereby generating plasma. A high concentration electrolyte aqueous solution, such as CsCl and RbCl, is circulated by means of a pump (2) and the surface of a jet of high concentration electrolyte aqueous solution injected from a glass nozzle (3) is exposed to an irradiation of focused femtosecond laser pulse (6) via an objective lens (7), thereby generating X-ray pulses.

Abstract: A method and an apparatus for generating X-rays in which continuous X-rays can be generated by irradiating a focused laser in the air using a liquid as a target, thereby generating plasma. A high concentration electrolyte aqueous solution, such as CsCl and RbCl, is circulated by means of a pump (2) and the surface of a jet of high concentration electrolyte aqueous solution injected from a glass nozzle (3) is exposed to an irradiation of focused femtosecond laser pulse (6) via an objective lens (7), thereby generating X-ray pulses.

Abstract: An organic electroluminescence device material having emission centers is formed by bringing a source (1) containing an emission center-forming compound absorptive of laser beams into contact with a target (2) having at least one function selected from an electron-transporting function and a hole-transporting function, and irradiating a laser beam at an intensity of or below the ablation threshold value of the source (1) from the source (1) side (or the target (2) side) thereby to implant the emission center-forming compound (3) of the source (1) into the target (2). Thus, it is possible to make a fine and minute pattern on the organic electroluminescence device material.