Electronic interaction of very slow light ions in Au: Electronic stopping and electron emission

Electronic interaction of very slow light ions in Au: Electronic stopping and electron emission

Článek recenzovaný mimo WoS a Scopus

Electronic stopping and ion-induced electron emission during the interaction of slow (v<0.1 a.u.) H+ and D+ ions with polycrystalline Au targets have been investigated. Electronic stopping is deduced from time-of-flight low-energy ion scattering measurements in backscattering geometry using polycrystalline films of several nanometers thick. Current measurements are performed to determine the ion-induced electron emission yield. Both in electronic stopping and in ion-induced electron emission we find a rather sharp, distinctive threshold velocity of ~0.19 a.u. for specific excitation and emission of 5d electrons. Below this threshold the projectiles interact exclusively with the 6s electrons.

Electronic stopping and ion-induced electron emission during the interaction of slow (v<0.1 a.u.) H+ and D+ ions with polycrystalline Au targets have been investigated. Electronic stopping is deduced from time-of-flight low-energy ion scattering measurements in backscattering geometry using polycrystalline films of several nanometers thick. Current measurements are performed to determine the ion-induced electron emission yield. Both in electronic stopping and in ion-induced electron emission we find a rather sharp, distinctive threshold velocity of ~0.19 a.u. for specific excitation and emission of 5d electrons. Below this threshold the projectiles interact exclusively with the 6s electrons.

electron backscattering; electron emission; electron-surface impact; gold, ion-surface impact

electron backscattering; electron emission; electron-surface impact; gold, ion-surface impact

MARKIN, S.; PRIMETZHOFER, D.; PRŮŠA, S.; BRUNMAYR, M.; KOWARIK, G.; AUMAYR, F.; BAUER, P.

2010

25.11.2008

1098-0121

PHYSICAL REVIEW B

78

19

Spojené státy americké

195122-1

195122-6

6