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алфа распаѓање

1) Spontaneous emission by a heavier element (such as uranium) of positively charged helium nuclei - alpha particles - comprising 2 protons and 2 neutrons. The result of this radioactive decay is that the original element is very gradually converted into another element, with a decreased atomic number and mass. Alpha particle emission may be simultaneous with beta particle decay. 2) The disintegration of an atomic nucleus, in which the final products are an alpha particle and a nucleus with two fewer protons and two fewer neutrons than the original.

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분야/도메인: 천문학
카테고리: 일반 천문학
Company: Caltech
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распаѓање

화학; 일반 화학

Change of an element into a different element, usually with some other particle(s) and energy emitted.

распаѓање

고고학; 인간 진화

In physics, the breaking apart of nuclei into smaller constituent nuclei, releasing energetic particles in the process as there is less total energy.

распаѓање

개인 생명; 이혼

Meaning to end or dissolve. Often used interchangeably with the word “divorce” as in “dissolution of marriage”.

ахроматска леќа

천문학; 일반 천문학

Lens (or combination of lenses) that brings different wavelenghts within a ray of light to a single focus, thus overcoming chromatic aberration. It was first successfully made by ...

активна галаксија

천문학; 일반 천문학

1) Active galactic nuclei are very luminous. Their energy output is in two forms: nonthermal continuum and thermal emission line. 2) Any galaxy which is emitting large quantities ...

активна оптика

천문학; 일반 천문학

Controlling the shape of a telescope mirror at a relatively slow rate.

единица на забрзување

천문학; 일반 천문학

A unit for measuring acceleration, which is metre per second squared.

зголемување

천문학; 일반 천문학

1) A process by which a star accumulates matter as it moves through a dense cloud of interstellar gas; or, more generally, whereby matter surrounding a star flows toward it (as in ...