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A Grotrian diagram of doubly ionized oxygen: forbidden transitions in the visible spectrum are shown in green. In astronomy and atomic physics, doubly ionized oxygen is the ion O 2+ (O III in spectroscopic notation).
Oxygen gas is the second most common component of the Earth's atmosphere, taking up 20.8% of its volume and 23.1% of its mass (some 10 15 tonnes). [19] [70] [d] Earth is unusual among the planets of the Solar System in having such a high concentration of oxygen gas in its atmosphere: Mars (with 0.1% O 2 by volume) and Venus have much less. The O
Doubly ionized oxygen (O 2+ This page was last edited on 27 November 2021, at 11:27 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
It is a cascade reaction involving electrons in a region with a sufficiently high electric field in a gaseous medium that can be ionized, such as air. Following an original ionization event, due to such as ionizing radiation, the positive ion drifts towards the cathode , while the free electron drifts towards the anode of the device.
Electron transitions from these levels in doubly ionized oxygen give rise to the 500.7 nm line. [12] These spectral lines, which can only be seen in very low density gases, are called forbidden lines. Spectroscopic observations thus showed that planetary nebulae consisted largely of extremely rarefied ionised oxygen gas (OIII).
Double ionization is a process of formation of doubly charged ions when laser radiation or charged particles like electrons, [1] positrons [2] or heavy ions [3] are exerted on neutral atoms or molecules. Double ionization is usually less probable than single-electron ionization. Two types of double ionization are distinguished: sequential and ...
Triatomic oxygen (ozone, O 3) is a very reactive allotrope of oxygen that is a pale blue gas at standard temperature and pressure. Liquid and solid O 3 have a deeper blue color than ordinary O 2, and they are unstable and explosive. [5] [6] In its gas phase, ozone is destructive to materials like rubber and fabric and is damaging to lung tissue ...
These can be made by reacting H + 2 or H + 3 with gaseous helium. [70] HeH 2+ is unstable in its ground state. But when it is excited to the 2pσ state the molecule is bound with an energy of 20 kcal/mol. This doubly charged ion has been made by accelerating the helium hydride ion to 900 keV, and firing it into argon. It only has a short life ...