How to Make Raman-Inactive Helium Visible in Raman Spectra of Tritium-Helium Gas Mixtures

2015 ◽  
Vol 67 (3) ◽  
pp. 559-562 ◽  
Author(s):  
Magnus Schlösser ◽  
Oskari Pakari ◽  
Simone Rupp ◽  
Sebastian Mirz ◽  
Sebastian Fischer
Keyword(s):  
Raman Spectra ◽  
Gas Mixtures ◽  
Helium Gas

scholarly journals Arsenic and Antimony Doping: An Attempt to Deposit n-type CVD Diamond

2007 ◽  
Vol 1039 ◽  
Author(s):  
Paul William May ◽  
Martin Davey ◽  
Keith N Rosser ◽  
Peter J Heard
Keyword(s):  
Electrical Conductivity ◽  
Gas Phase ◽  
Raman Spectra ◽  
Diamond Film ◽  
Cvd Diamond ◽  
Gas Mixtures ◽  
Antimony Doping ◽  
Hot Filament ◽  
Incorporation Efficiency

AbstractWe report the results of experiments that attempt to deposit n-type CVD diamond in a standard hot filament reactor using 1%CH4/H2 gas mixtures, using (i) AsH3 as a gas phase source of arsenic, and (ii) evaporated Sb or Sb(Ph)3 as a source of antimony. SIMS measurements revealed that under these conditions, neither Sb nor As is incorporated into the diamond film, and the Raman spectra, electrical conductivity and crystallite morphology remain unchanged from that of undoped diamond. These experiments confirm the predicted low incorporation efficiency for As and Sb, and we conclude that doping CVD diamond with these elements cannot readily be achieved in this manner.

scholarly journals Investigation of lubricant transfer and distribution at head/disk interface in air-helium gas mixtures

Friction ◽  
2018 ◽  
Vol 7 (6) ◽  
pp. 564-571
Author(s):  
Zhengqiang Tang ◽  
Dongdong Zhou ◽  
Tong Jia ◽  
Deng Pan ◽  
Chuanwei Zhang
Keyword(s):  
Gas Mixtures ◽  
Head Disk Interface ◽  
Lubricant Transfer ◽  
Disk Interface ◽  
Helium Gas

Oxygen and helium gas mixtures for dyspnoea

2007 ◽  
Vol 1 (2) ◽  
pp. 91-95 ◽  
Author(s):  
Elizabeth A Laude ◽  
Sam H Ahmedzai
Keyword(s):  
Gas Mixtures ◽  
Helium Gas
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