New ion desorption mechanism from rare gas solids by multiply charged ion impacts
K. Ban1, M. Akiwa1, H. Ueta1,2, T. Tachibana1,2*, and T. Hirayama1,2
1Department of Physics, Rikkyo University, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
2Research Center for Measurement in Advanced Science (RCMAS), Rikkyo University Nishi-Ikebukuro, Toshimaku, Tokyo 171-8501, Japan pos Анотація:
Received January 17, 2019, published online May 28, 2019
This study measured the absolute ion desorption yield from the surface of solid Ne and Ar by low-energy Neq+ (q = 1–4), Arq+ (q = 1–6), and Krq+ (q = 2–6) ion impacts. Results revealed the dependence of ion desorption yield on the potential and the kinetic energies of the incident ions, as well as its linear proportionality with the former. Present results could not be explained by existing models for ion desorption from insulator surfaces. We proposed a new mechanism of ion desorption that considers the contribution of both energy types to ion desorption.
Key words: potential sputtering, ion desorption, rare gas solids.