Electronic sputtering produced by fission fragments on condensed CO and CO2

Abstract:

Condensed CO and CO2 are bombarded by ∼65 MeV 252Cf fission fragments and the desorbed ions are analyzed by time-of-flight mass spectrometry as a function of target temperature, in the ranges 25–33 K and 75–91 K, respectively. Absolute desorption yields are measured up to complete ice sublimation. The mass spectra of both ice targets reveal the emission of: (1) low mass ions, produced by direct Coulomb interaction of the highly charged projectiles and δ-electrons with CO and CO2, and (2) pronounced series of cluster ions. The basic ice cluster structures (CO)n and (CO2)n are present in the emitted cluster series such as (CO)nCO+, (CO2)nCO 2 + , or (CO2)nCO 3 − . In the case of CO ice, however, the intense production of the series C n + , Cn/−, and (CO)mC n + shows that Cn …

Año de publicación:

2006

Keywords:

Fuente:

google