LUMINESCENCE OF SELF-TRAPPED EXCITONS INDUCED BY SINGLE KEV ION-BOMBARDMENT Conference Paper uri icon

abstract

  • We have studied the light emission from CsI and NH4Cl films that were bombarded simultaneously with H-, low mass organic, and (CsI)nI- (n = 0-2) ions in the keV energy range (25-45 keV) at room temperature. Photons were detected from the impact of individual primary ions with a single photon counting photomultiplier, and were analyzed using time resolved and wavelength analysis. For CsI, fast ( 12 ns) and slow ( 650 ns) component decays were observed for all projectiles used. The fast component's emission was 300 nm while the slow component's emission was in the visible. Only a fast component ( < 3 ns) was observed in the UV region for NH4Cl. Our data suggest that the light emission from both samples is due to the radiative relaxation of self-trapped excitons which are produced by electronic interactions between the primary ions and the target atoms. 1995.

published proceedings

  • NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

author list (cited authors)

  • KAERCHER, R. G., DASILVEIRA, E. F., BLANKENSHIP, J. F., & SCHWEIKERT, E. A.

citation count

  • 3

complete list of authors

  • KAERCHER, RG||DASILVEIRA, EF||BLANKENSHIP, JF||SCHWEIKERT, EA

publication date

  • June 1995