title: High velocity proton collision with liquid lithium: a time dependent density functional theory study.
abstract: Liquid lithium is often used as a coating material in fusion reaction chambers, where it is under constant bombardment from high speed neutrons and protons. However, numerous fundamental questions are unanswered, for example whether a single proton impact can cause Li atom sputtering, and what is the electron excitation energy profile after a collision particularly for extremely high energy projectiles. Herein, we use a real-time dependent density functional method to study these questions for proton energies in the range of 30 eV to 1 MeV. The calculated stopping power agrees well with experiment, and it is found that the stopping power cannot be described by the single electron exciting spectrum based on the adiabatic eigen energies, and Li atom sputtering is not observed within our simulation time.
authors.affiliation: School of Information and Electrical Engineering, Zhejiang University City College, Hangzhou 310015, China and Material Science Diversion, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. lwwang@lbl.gov.
authors.forename: Gang
authors.identifier: http://orcid.org/0000-0002-8089-7983
authors.initials: G
authors.lastname: Bi
authors.affiliation: Material Science Diversion, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. lwwang@lbl.gov.
authors.forename: Jun
authors.initials: J
authors.lastname: Kang
authors.affiliation: Material Science Diversion, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. lwwang@lbl.gov.
authors.forename: Lin-Wang
authors.initials: LW
authors.lastname: Wang