Heavy‐ion excitation of rare‐gas excimers

Beams of high‐energy heavy ions (Ar and U) from the UNILAC accelerator have been used to excite rare gases at pressures near 1 bar. The dominant spectroscopic feature observed in Ar, Kr, and Xe gases was molecular excimer emission at the second excimer continuum at 130, 150, and 170 nm, respectively. The excimer radiation was studied as a function of time (with respect to the excitation pulse), ion‐beam current, pressure, and excitation density. The efficiency of excimer production from heavy‐ion‐beam energy was found to be several percent. Details of spectral shape, especially the ratio of first‐to‐second continuum emission, were found to depend on pressure and exciting beam type.

[1]  M. Hutchinson.  Excimers and excimer lasers , 1980 .

[2]  E. George,et al.  Radiative and kinetic mechanisms in bound-free excimer lasers , 1977 .

[3]  R. Deyoung,et al.  Nuclear‐pumped 3He‐Ar laser modeling , 1979 .

[4]  E. Arakawa,et al.  Optical Emission from Argon Excited by Alpha Particles: Quenching Studies , 1964 .

[5]  A. Szöke,et al.  Electronic Energy Transfer Phenomena in Rare Gases , 1972 .

[6]  G. K. Walters,et al.  Production mechanisms and radiative lifetimes of argon and xenon molecules emitting in the ultraviolet , 1974 .

[7]  Rosen,et al.  Exploding foil technique for achieving a soft x-ray laser. , 1985, Physical review letters.

[8]  H. Kleinpoppen,et al.  Progress in Atomic Spectroscopy Part C , 1978 .

[9]  A. Ulrich,et al.  Heavy ion beam pumped lasers , 1985 .

[10]  C. Duzy,et al.  A study of VUV fluorescence and lasing in electron beam excited xenon , 1980, IEEE Journal of Quantum Electronics.

[11]  C A Tobias,et al.  Radial cutoff LET and radial cutoff dose calculations for heavy charged particles in water. , 1973, Radiation research.

[12]  M. J. Carvalho,et al.  Argon luminescence bands between 1600 and 2900 Å , 1981 .

[13]  J. Galy,et al.  Spectroscopic and kinetic analysis of the VUV emissions of argon and argon-xenon mixtures. II. Energy transfer in Ar-Xe mixtures , 1982 .

[14]  Robert Katz,et al.  Energy Deposition by Electron Beams and δ Rays , 1968 .

[15]  Weaver,et al.  Demonstration of a soft x-ray amplifier. , 1985, Physical review letters.

[16]  H. Bohn,et al.  Heavy ion beam pumped He‐Ar laser , 1983 .

[17]  J. Galy,et al.  Continuous emissions of argon and krypton in the near ultraviolet , 1975 .