No abstract

Emission spectra from a King's furnace containing mixtures of Cu-Te and Au-Te respectively have been recorded. New bands appear with the Cu-Te mixture at about 1800 OC in the region hA6965-6110, and with the Au-Te mixture they appear at about 2100 OC in the range M6940-6155. In both cases the bands are degraded to the red. They are attributed to diatomic CuTe and AuTe respectively. Vibrational analyses which include all the observed bands give the following constants:

No abstract

No abstract

The objective of this work is to investigate the density of negative hydrogen ions in high-density, low-temperature recombining hydrogen plasmas. The recombining hydrogen plasmas were obtained in a compact divertor simulator excited by helicon-wave discharges. The electron density and the electron temperature of the recombining plasmas were (1-4) × 10 12 cm −3 and 0.1-0.2 eV, respectively, which were evaluated by comparing the population distribution of the excited states of atomic hydrogen with the Saha-Boltzmann equation. The ratio of the negative ion to electron density ranged between 0 and 0.02 in the recombining plasmas, which was one order of magnitude lower than that observed in a plasma with an electron density on the order of 10 11 cm −3 . The less efficient production of negative hydrogen ions may be attributed to significant dissociation of molecular hydrogen in high-density plasmas.