Temperature and pressure control of cold helium gas above liquid helium for laser spectroscopy of atoms and molecules at 3-30 K

Yukari Matsuo*, Yoshimitsu Fukuyama, Yoshiki Moriwaki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We have developed a novel and simple technique to control the temperature and pressure of cold helium gas independently in a designated space above liquid helium. The technique functions through adjustment of both the pumping speed of helium gas and the evaporation of liquid helium using a heater immersed in the liquid helium. This technique enables us to investigate the peculiar temperature dependence of collision cross sections of Ba+* and He, or Ba+*-He and He at temperatures of 3-30 K through observation of laser-induced fluorescence spectra of Ba+*-He, or exciplexes.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages392-393
Number of pages2
DOIs
StatePublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006/08/102006/10/17

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL
Period2006/08/102006/10/17

Keywords

  • Barium
  • Cold helium gas
  • Laser spectroscopy

ASJC Scopus subject areas

  • General Physics and Astronomy

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