Observation of high-energy electrons from a metal target irradiated by protons with a mean energy of 25 keV

• Published in: JETP letters 2009-07, Vol.89 (10), p.492-495
• Main Authors: Golovin, G. V., Savel’ev, A. B., Uryupina, D. S., Volkov, R. V., Mar’in, B. V.
• Format: Article
• Language: English
• Subjects: Atomic; Biological and Medical Physics; Biophysics; Gases; Molecular; Optical and Plasma Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Plasma; Quantum Information Technology; Solid State Physics; Spintronics
• ISSN: 0021-3640; 1090-6487
• DOI: 10.1134/S002136400910004X

Electrons with abnormally high energies of up to 16 keV are detected from an iron target irradiated by ions (H + , Fe + , Fe 2+ , Fe 3+ ) with energies ranging from 20 to 100 keV from the plasma of a high-power femtosecond laser pulse with an intensity of 10 16 J/(s cm 2 ). These electrons indicate that the energy of an incident ion is almost completely transferred to an electron knocked out of the target. In a range of 6–16 keV, the spectrum of electrons knocked out of the K shell of iron atoms by protons with an energy of 22 ± 2 keV is quasi-exponential with an exponent of 4 keV. For 8-keV electrons, the double differential cross section for ionization by such protons is estimated as 10 −7 b/(eV sr).