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proceso triple alfa

A nuclear reaction (3 4He → 12C + γ + 7 MeV) by which helium is transformed into carbon. The process is dominant in red giants. At a temperature of about 2 × 108 K and a density of 105 g cm-3, after core hydrogen is exhausted, three α-particles can fuse to form an excited nucleus of carbon 12, which occasionally decays into a stable carbon 12 nucleus. The overall process can be looked upon as an equilibrium between three helium nuclei and the excited 12C*, with occasional irreversible leakage out of the equilibrium into the ground state of carbon 12. Further capture of α-particles by carbon 12 nuclei produces oxygen 16 and neon 20. (also called the triple-α process.)

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Saistītie termini

proceso
Miscellaneous; Nouns

Una serie de acciones o pasos a tomar a fin de lograr una meta en particular.

proceso
Software; CRM applications

Un a definición para un flujo de trabajo automatizado que consiste en pasos, incluyendo las acciones que el flujo laboral deba tomar a cada paso y las reglas que deban usar para ...

triple
Education; SAT vocabulary

Threefold.

triple
Beverages; Coffee

La adición de un tercer shot de espresso a un café.

alfa
Design; Design

A 'color component' which represents the opacity of an object.

Sistema de Procesado de imágenes astronómicas
Astronomy; General astronomy

Developed by the National Radio Astronomy Observatory.

órbita
Astronomy; General astronomy

The path of one object about another (used here for an object orbiting the sun).

meteoros
Astronomy; General astronomy

Small rocky and/or icy particles that are swept up by the earth in its orbit about the sun. Also called "shooting stars", they travel across the sky in a very short time, from ...

equinoccio
Astronomy; General astronomy

Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

cometa
Astronomy; General astronomy

A celestial body orbiting the sun (though some may be ejected from the solar system by planetary perturbations) that displays (at least during a portion of its orbit) some ...

cenit
Astronomy; General astronomy

The point directly overhead in the sky.

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