Publication detail

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

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

Czech title

Interakce velmi pomalých iontů s elektronovým obalem ve zlatě: elektronové brzdění a emise elektronů.

English title

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

Type

journal article - other

Language

en

Original abstract

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.

Czech abstract

Byla studována interakce velmi pomalých iontů H+ a D+ s polykrystalyckým zlatým terčem. V případě elektronového brzdění i emise elektronů způsobené dopadem iontů byla nalezena velmi úzká hranice rychlostí (0.19 a.u.) pro excitaci a emisi 5d elektronů. pod touto hranicí elektronyý interagují pouze s 6s elektrony.

English abstract

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.

Keywords in Czech

zpětný rozptyl elektronů; emise elektronů; dopad elektronů na povrch; zlato; dopad iontů na povrch

Keywords in English

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

RIV year

2008

Released

25.11.2008

ISSN

1098-0121

Journal

PHYSICAL REVIEW B

Volume

78

Number

19

Pages from–to

195122-1–195122-6

Pages count

6

BIBTEX


@article{BUT48056,
  author="S. N. {Markin} and Daniel {Primetzhofer} and Stanislav {Průša} and M. {Brunmayr} and Gregor {Kowarik} and Friedrich {Aumayr} and P. {Bauer},
  title="Electronic interaction of very slow light ions in Au: Electronic stopping and electron emission",
  journal="PHYSICAL REVIEW B",
  year="2008",
  volume="78",
  number="19",
  month="November",
  pages="195122-1--195122-6",
  issn="1098-0121"
}