partícula alfa

partícula alfa

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.

0 0

完善词条

添加图像

词性：名词
同义词：
词汇：
行业/领域：天文学
类别普通天文学
Company: Caltech
产品：
取首字母的缩写词：

添加至 My Glossary

其他语言：

类似词条

partícula

化学; 普通化学

Small portion of matter, actually the msallest one after molecule. Molecule is divided to particles.

alfa

设计; 设计

A 'color component' which represents the opacity of an object.

alfa

动物; 狗

Term used to describe the highest ranked or most dominant individual of one's sex. Used of social animals: the alpha female of the wolf pack..

alfa

软件; 计算机; 操作系统

The graphics state parameter that Quartz uses to determine how to composite newly painted objects to the existing page. At full intensity (alpha =1.0 ), newly painted objects are ...

Sistema de Procesado de imágenes astronómicas

天文学; 普通天文学

Developed by the National Radio Astronomy Observatory.

órbita

天文学; 普通天文学

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

meteoros

天文学; 普通天文学

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 ...

equinoccio

天文学; 普通天文学

Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

cometa

天文学; 普通天文学

A celestial body orbiting the sun (though some may be ejected from the solar system by planetary perturbations) that displays (at least during a portion of its orbit) some ...