Suchergebnisse
Suchergebnisse:
There are various alternative paths and catalysts involved in the CNO cycles, but all these cycles have the same net result: 4 1 1 H + 2 e − → 4 2 He + 2 e + + 2 e − + 2 ν e + 3 γ + 24.7 MeV → 4 2 He + 2 ν e + 7 γ + 26.7 MeV
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, 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
Der Der BETHE-WEIZSÄCKER-Zyklus ist neben der Proton-Proton-I-Kette die zweite Fusionsreaktionen, durch die Sterne Wasserstoff in Helium umwandeln. Abb. 1 Ablauf des BETHE-WEIZSÄCKER-Zyklus. Dabei laufen folgende Kernreaktion ab: 12 C + 1 H → 13 N + γ + 1, 95 M e V 13 N → 13 C + e + + ν e + 1, 37 M e V 13 C + 1 H → 14 N + γ + 7, 54 M ...
Der Bethe-Weizsäcker-Zyklus (auch CN-Zyklus, CNO-Zyklus, CNO-I-Zyklus, Kohlenstoff-Stickstoff-Zyklus) ist eine der acht Fusionsreaktionen des so genannten Wasserstoffbrennens, durch die Sterne Wasserstoff in Helium umwandeln; die anderen sind die Proton-Proton-Reaktion sowie weitere mögliche CNO-Zyklen, die allerdings bei noch ...
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] Under typical conditions found in stars ...
12. Dez. 2022 · Aldo Serenelli. Institute of Space Sciences (ICE-CSIC), Barcelona, Spain. December 12, 2022 • Physics 15, 190. A study of neutrinos from the Sun has measured the signal from the so-called CNO cycle, offering a direct measure of the elemental abundances in the Sun’s core. APS/ Alan Stonebraker. Figure 1: A representation of the CNO cycle.
