Emission spectra from pulsed discharges in liquid helium

The time-resolved emission spectra from high-voltage pulsed discharges in liquid helium below 4.2 K, 1 atm, and cryogenic helium gas near 4.2 K, 1 atm, have been measured in the visible spectral range. In addition to the well known atomic lines, which exhibit strong and broadened profiles with conti...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Japanese Journal of Applied Physics 1997-07, Vol.36 (7A), p.4474-4480
Hauptverfasser: QIN, W, MINAMI, K, DESILVA, A. W, TOMIMOTO, F, SATO, K
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The time-resolved emission spectra from high-voltage pulsed discharges in liquid helium below 4.2 K, 1 atm, and cryogenic helium gas near 4.2 K, 1 atm, have been measured in the visible spectral range. In addition to the well known atomic lines, which exhibit strong and broadened profiles with continua at an early stage, some strong spectral features are observed near 23300 cm -1 ( ∼430 nm) and 25300 cm -1 ( ∼395 nm). The former can be assigned to He 2 transition ( g 3 Σ g + – a 3 Σ u + ), and the latter is not observed in previously reported works. These features disappear in 77 K and 300 K, 1 atm, He gas under the same experimental conditions.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.36.4474