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In 1927, Ira Sprague Bowen published the current explanation identifying their source as doubly ionized oxygen. [1] Other transitions include the forbidden 88.4 μm and 51.8 μm transitions in the far infrared region. [2] Permitted lines of O III lie in the middle ultraviolet band and are hence inaccessible to terrestrial astronomy.
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 ...
Doubly ionized oxygen (O 2+), an ion; O(2), the 2-dimensional orthogonal group in group theory; O2, an EEG electrode site according to the 10–20 system;
Physicists showed in the 1920s that in gas at extremely low density, electrons can populate excited metastable energy levels in atoms and ions, which at higher densities are rapidly de-excited by collisions. [11] Electron transitions from these levels in doubly ionized oxygen give rise to the 500.7 nm line. [12]
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
Unless you've already gone electric, you don't need a news report to tell you about just how quickly gas prices are rising. The national average is a record $4.316 per gallon, according to AAA, and...
A plasma lamp, illustrating a low degree of ionization (i.e. a partially ionized gas) . The degree of ionization (also known as ionization yield in the literature) refers to the proportion of neutral particles, such as those in a gas or aqueous solution, that are ionized.
Tesla knocked roughly a third off the price of its “Full Self Driving” system — which can’t drive itself and so drivers must remain alert and be ready to intervene — to $8,000 from ...