alfa-čestica

alfa-čestica

1) Nucleus formed by the α-process (q.v.) (see even-even nuclei.)

2) Particle first discovered in radioactive α decay, and later identified as helium nuclei (two protons and two neutrons bound together.)

3) The nucleus of a 4He atom, consisting of two protons and two neutrons. Mass of α-particle 4.00260 amu.

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품사: 명사
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분야/도메인: 천문학
카테고리: 일반 천문학
Company: Caltech
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alfa čestica

의료기기; 방사선 장비

(image) the nucleus of a helium atom, made up of two neutrons and two protons with a charge of +2. Certain radioactive nuclei emit alpha particles. Alpha particles generally carry ...

alfa čestica

반도체; 반도체 품질

Helium nuclei emitted as a result of the radioactive decay of trace amounts of naturally occurring uranium and thorium found in semiconductor packaging materials. Alpha particles, ...

čestica

의약품; 의료기기;

a tiny mass of material.

čestica

전기 장비; 연료 전지

Particulates, alternatively referred to as particulate matter (PM) or fine particles, are tiny particles of solid or liquid suspended in a gas.

aktinijum

천문학; 일반 천문학

soft, silvery-white, radioactive metal which glows in the dark

nuklearna veličina

천문학; 일반 천문학

See definition for m 2 , above.

orbitalni elementi

천문학; 일반 천문학

Parameters (numbers) that determine an object's location and motion in its orbit about another object. In the case of solar-system objects such as comets and planets, one must ...

orbita

천문학; 일반 천문학

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

meteori

천문학; 일반 천문학

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 ...

m2

천문학; 일반 천문학

The magnitude value measured (or predicted) for a comet's nuclear condensation. Note that the true comet nucleus is rarely, if ever, directly observed from the earth because of ...

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Černobil

A disaster which occurred in the Chernobyl power plant in 1986, where one out of four nuclear reactors in the plant exploded, resulting in at least 5% ...