Details

Autor(en) / Beteiligte

• Zhao, Y T
• Zhang, Y N
• Cheng, R
• He, B
• Liu, C L
• Zhou, X M
• Lei, Y
• Wang, Y Y
• Ren, J R
• Wang, X
• Chen, Y H
• Xiao, G Q
• Savin, S M
• Gavrilin, R
• Golubev, A A
• Hoffmann, D H H

Titel

Benchmark Experiment to Prove the Role of Projectile Excited States Upon the Ion Stopping in Plasmas

Ist Teil von

• Physical review letters, 2021-03, Vol.126 (11), p.115001-115001, Article 115001

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2021

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We report on a precision energy loss measurement and theoretical investigation of 100  keV/u helium ions in a hydrogen-discharge plasma. Collision processes of helium ions with protons, free electrons, and hydrogen atoms are ideally suited for benchmarking plasma stopping-power models. Energy loss results of our experiments are significantly higher than the predictions of traditional effective charge models. We obtained good agreement with our data by solving rate equations, where in addition to the ground state, also excited electronic configurations were considered for the projectile ions. Hence, we demonstrate that excited projectile states, resulting from collisions, leading to capture-, ionization-, and radiative-decay processes, play an important role in the stopping process in plasma.