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aalfa raspad

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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Kapcsolódó kifejezések

raspad
Chemistry; General chemistry

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

polu-raspad
Chemistry; General chemistry

The amount of time it takes for half an initial amount to disintegrate.

radioaktivni raspad
Physics; General physics

The natural spontaneous disintegration or decomposition of a nucleus.

radioaktivni raspad
Anthropology; Cultural anthropology

The regular process by which radioactive isotopes break down into their decay products with a half-life which is specific to the isotope in question (see also radiocarbon dating).

aktinoidi
Astronomy; General astronomy

Elementi sa atomskim brojevima od 89 (Aktinij) i 103

aktinijum
Astronomy; General astronomy

Mekan, srebrno-beli radioaktivni metal koji sija u mraku

akivna optika
Astronomy; General astronomy

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

adaptivna optika
Astronomy; General astronomy

Compensating for atmospheric distortions in a wavefront by high-speed changes in the shape of a small, thin mirror.

americijum
Astronomy; General astronomy

radioactive silvery metal which does not occur naturally

jedinica ubrzanja
Astronomy; General astronomy

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

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