Suchergebnisse
Suchergebnisse:
The CNO cycle (for carbon – nitrogen – oxygen; sometimes called Bethe–Weizsäcker cycle after Hans Albrecht Bethe and Carl Friedrich von Weizsäcker) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction (p–p cycle), which is more efficient at the Sun 's core te...
CNO cycle, sequence of thermonuclear reactions that provides most of the energy radiated by the hotter stars. It is only a minor source of energy for the Sun and does not operate at all in very cool stars. Four hydrogen nuclei are in effect converted into one helium nucleus, a fraction of the mass.
- The Editors of Encyclopaedia Britannica
CNO cycle. The ‘ CNO cycle’ refers to the Carbon-Nitrogen- Oxygen cycle, a process of stellar nucleosynthesis in which stars on the Main Sequence fuse hydrogen into helium via a six-stage sequence of reactions. This sequence proceeds as follows: A carbon-12 nucleus captures a proton and emits a gamma ray, producing nitrogen-13.
CNO Cycle Reaction. In higher-mass stars, the dominant energy production process is the CNO cycle, which is a catalytic cycle that uses nuclei of carbon, nitrogen and oxygen as intermediaries and in the end produces a helium nucleus as with the proton-proton chain. CNO reaction is a very temperature sensitive process. [3] .
CNO cycle. Triple-α process. Combined energy generation of PP and CNO within a star. The Sun's core temperature, at which PP is more efficient. In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars.
5. Feb. 2018 · The breakout from the hot CNO cycles triggers a reaction chain by which the initial 4 He and CNO material is processed within seconds towards the Ni range by a sequence of alpha and proton capture reactions.
25. Nov. 2020 · In the CNO cycle, the fusion of hydrogen is catalysed by carbon, nitrogen and oxygen, and so its rate—as well as the flux of emitted CNO neutrinos—depends directly on the...
