Pronounced small-angle diffraction in the binary encounter peak in collisions of Au11+ with H2

The authors have measured angular distributions of binary encounter electrons resulting from collisions of 0.6 MeV amu-1 Au11+ projectiles with H2 and He between 0' and 45'. For the hydrogen target a splitting of the binary peak into two well resolved components was observed in the large angular interval from 5' to 30'. On the other hand the He target produced cross sections in which the BE peak splitting is essentially confined within the angular range from 20' to 30'. The early onset of the double-peak feature at very forward angles in the H2 case is interpreted as the experimental manifestation of a deep diffraction minimum, located at a laboratory angle of 12.5', in the model cross section for the elastic scattering of 327 eV electrons (i.e. electrons possessing the velocity equivalent of 0.6 MeV amu-1) in the screened field of the Au11+ projectile.

[1]  G. Kraft,et al.  Delta-electron emission in fast heavy ion — atom collisions: observations of new phenomena and breakdown of common scaling laws , 1992, Advances in space research : the official journal of the Committee on Space Research.

[2]  W. Wolff,et al.  Diffraction in the binary encounter electron peak observed in collisions of 0.6 MeV amu-1 I7+ I23+ and Au11+ projectiles with He and Ar , 1992 .

[3]  J. Ullrich,et al.  Quasi-discretization of the electron continuum emitted in collisions of 0.6 MeV u-1 Au11+ with noble gases , 1992 .

[4]  Wang,et al.  Electron loss at backward observation angles. , 1991, Physical review. A, Atomic, molecular, and optical physics.

[5]  D. Schultz,et al.  Binary peak enhancement and structure in partially stripped ion-atom collisions , 1991 .

[6]  Olson,et al.  Quantum interference in clothed-ion-atom binary peak structures. , 1991, Physical review letters.

[7]  C. Lin,et al.  Charge-state dependence of elastic scattering cross sections at large angles between electrons and multiply charged ions , 1990 .

[8]  D. Schultz,et al.  Theoretical description of the binary peak in clothed ion-atom collisions , 1990 .

[9]  D. Lee,et al.  Binary-encounter electrons observed at 0° in collisions of 1-2-MeV/amu H + , C 6+ , N 7+ , O 8+ , and F 9+ ions with H 2 and He targets , 1990 .

[10]  S. Schmidt,et al.  Observation of structures in the binary encounter peak in fast uranium-rare gas collisions , 1989 .

[11]  D. R. Bates.  Case studies in atomic physics , 1975 .

[12]  J. Kessler,et al.  Streuung von Elektronen an Quecksilberatomen im Energiebereich 200 bis 4000 eV , 1965 .