X-Ray and Inner-Shell Processes
Vol. 1

J. Phys. Colloques 48 (1987) C9-301-C9-306
DOI: 10.1051/jphyscol:1987954

PRODUCTION OF DOUBLY CORE EXCITED CONFIGURATIONS IN C⁴⁺ PROJECTILES THROUGH RESONANT TRANSFER EXCITATION

J .M. ANTHONY¹, S .M. SHAFROTH², M. BENHENNI², E . N. STRAIT³, T.J.M. ZOUROS⁴, L.D. HENDRICK⁵ and D.M. PETERSON<sup>5

1</sup>  Also North Carolina State University. Raleigh, NC 27695. U.S.A.
²  University of North Carolina, Chape1 Hill, NC 27514, Triangle Universities Nuclear Laboratory, Durham, NC 27706, U.S.A.
³  Macalester College, St. Paul, MN 55105, U.S.A.
⁴  Kansas State University, Manhattan, KS 66506, U.S.A.
⁵  Francis Marion College, Florence, SC 29501, U.S.A.

Abstract
Projectile K-Auger electron production cross sections have been measured for C⁴⁺ ions in 3 to 8 MeV collisions with atomic He, Ne, and molecular Hydrogen targets at lab observation angles of 9.6° to 10.6°. The K-Auger electron spectra predominantly result from decays of Li-like excited states and are interpreted as single electron capture to the metastable ls2s ³S component of the incident beam. High resolution K-LL Auger spectra show that capture into 2s is suppressed by the presence of the 2s spectator electron. The formation of single and double core excited Li-like ²D configurations are interpreted in part as resonant transfer and excitation with the ground state and metastable components respectively. Also, the data shows a much stronger production of the 2s²2p ²P configuration through NTE for Ne than for the He target.