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α粒子 (アルファりゅうし) Japanese meaning | Kotomora

α粒子あるふぁりゅうし

ア

ル

ファ

りゅ

う

し

Meanings

1

noun

alpha particle

physics

Physics term for a helium-4 nucleus emitted during alpha decay.

α粒りゅう子しはヘリウムの原げん子し核かくである。
An alpha particle is a helium nucleus.
ラジウムはα粒りゅう子しを放ほう出しゅつして崩

ほう

壊かい

する

。

Radium decays by emitting alpha particles.

Written forms

α粒子あるふぁりゅうし
Standard scientific notation using the Greek letter alpha.
アルファ粒りゅう子し
Kana spelling of the alpha part; common in less technical contexts or when Greek letters are unavailable.

Kanji

粒grains, drop, counter for tiny particles
子child, sign of the rat, 11PM-1AM

Similar words

β粒子べーたりゅうし
Beta particle (electron or positron), lighter and more penetrating than an alpha particle.
γ線がんません
Gamma ray, electromagnetic radiation, more penetrating than alpha particles.

Etymology

Compound of α (alpha) + 粒子 (particle). The term is a direct calque from English 'alpha particle'.