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Alpha-ray

释义 Definition

α射线（阿尔法射线）：由放射性物质发射出的带正电的粒子辐射，本质上主要是氦核（2个质子+2个中子）。穿透力较弱，但电离作用强。（也常写作 alpha ray / alpha rays）

例句 Examples

Alpha rays can be stopped by a sheet of paper.
α射线可以被一张纸挡住。

In early nuclear physics, researchers used alpha rays to study atomic structure and identify new elements.
在早期核物理研究中，研究人员用α射线来探测原子结构并鉴定新元素。

发音 Pronunciation (IPA)

/lf re/

词源 Etymology

alpha- 来自希腊字母 α（alpha），早期用来给不同类型的放射性辐射分类；ray 意为“射线/辐射”。“alpha-ray”因此指“被归类为α类的射线”，后来明确为由α粒子构成的辐射。

相关词 Related Words

文学与著作中的用例 Literary Works

Ernest Rutherford, Radio-Activity（1904）
Marie Curie, Traité de radioactivité（《放射性论》, 1904）
Robert A. Millikan, The Electron and the Light-Quant from the Experimental Point of View（1917，涉及早期辐射与粒子实验语境）

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