X-ray spectra induced by 129Xe q+ impacting the metal surface

Abstract

Using the slow highly charged ions 129 Xe q+ (q = 25, 26, 27; initial kinetic T 0 ≤4.65 keV/a.u.) to impact Au surface, the Au atomic Mα characteristic X-ray spectrum is induced. The result shows that as long as the charge state of projectile is high enough, the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak (nA magnitude), and the X-ray yield per ion is in the order of 10 −8 and increases with the kinetic energy and potential energy of projectile. By measuring the Au Mα-X-ray spectra, Au atomic N-level lifetime is estimated at about 1.33×10 −18 s based on Heisenberg uncertainty relation.slow highly charged ions, characteristic X-ray, level lifetimeThe intensity and excitation condition of atomic characteristic X-rays become very important as the studies on simulation laboratory astrophysics and plasma progress [1][2][3] . Atomic characteristic X-ray spectra play key roles in the study of element abundance, electron density, plasma physics and astrophysics. The X-rays of plasma emission are found in the activity of late-type and supernova and the process of celestial bodies motion, such as nucleons interaction of active galaxy and collapsed stellar [4,5] . By measuring X-ray spectrum, such physical processes as the temperature, density, component element and ionic state of plasmas can be determined, and then the law of plasma physics and astrophysics can be studied. At the same time, so important is the study on atomic construction and X-ray spectra that can be used to develop high density matter, electron function material and X-ray laser material.Based on Bohr's theory, atomic characteristic X-rays derive from the filling of the holes produced after the inner-shell electrons are excitated. At present, there are various means that can be

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