Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive .

2024年4月22日 · Radioactive decay is the emission of energy in the form of ionizing radiation. Example decay chains illustrate how radioactive atoms can go through many transformations as they become stable and no longer radioactive.

Radioactive decay is the process in which an unstable nucleus spontaneously loses energy by emitting ionizing particles and radiation. This decay, or loss of energy, results in an atom of one type, called the parent nuclide, transforming

2024年8月12日 · Radioactive decay, also known as nuclear decay, radioactivity, or radioactive disintegration, is a fundamental process in nuclear physics. It is a process in which an unstable atomic nucleus loses energy to become stable.

When an individual nucleus transforms into another with the emission of radiation, the nucleus is said to decay. Radioactive decay occurs for all nuclei with Z> 82, and also for some unstable isotopes with Z <83. The decay rate is proportional to the number of …

Radioactive decay, also known as nuclear decay or radioactivity, is a random process by which an unstable atomic nucleus loses its energy by emission of radiation or particle. A material containing unstable nuclei is considered radioactive.

2023年9月25日 · Radioactive decay is a physical phenomenon that involves the spontaneous transformation of unstable atomic nuclei into more stable ones. This nuclear process plays a crucial role in nuclear physics and has significant implications in fields such as medicine and geological dating.

2021年5月30日 · Radioactivity is the spontaneous emission of ionizing radiation from nuclear decay and reactions. The three main types of radioactive decay are alpha, beta, and gamma decay, but there are other nuclear reactions responsible for radioactivity.

半衰期是放射性同位素衰变的一个主要特征常数，它不随外界条件、元素状态或质量变化而变，放射性同位素的半衰期的长短差别很大，短的仅千万分之一秒，长的可达数百亿年，半衰期愈短的同位素， 放射性 愈强。 原子核 自发地放射出 α粒子 而转变成另一种核的过程叫做α衰变。 对于天然放射性同位素而言，只有 质量数 A大于140的重原子核才能产生α衰变，特别是 原子序数 Z大于82和质量数A大于209的放射性同位素，都以α衰变为主。 α衰变的通式为： β粒子 有正、负电 …

In a nuclear decay reaction, also called radioactive decay, an unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements. The resulting daughter nuclei have a lower mass and are lower in energy (more stable) than the parent nucleus that decayed.