Isotopes of actinium - Wikipedia
网页Actinium (89 Ac) has no stable isotopes and no characteristic terrestrial isotopic composition, thus a standard atomic weight cannot be given. There are 34 known isotopes, from 203 Ac to 236 Ac, and 7 isomers. Three isotopes are found in nature, 225 Ac, 227 Ac and 228 Ac, as intermediate decay products of, respectively, 237 Np, 235 U, and 232 ...
Decay chain - Wikipedia
网页This diagram illustrates the four decay chains discussed in the text: thorium (4n, in blue), neptunium (4n+1, in pink), radium (4n+2, in red) and actinium (4n+3, in green). The four most common modes of radioactive decay are: alpha decay, beta decay, inverse beta decay (considered as both positron emission and electron capture), and isomeric ...
Actinium Series - Actinium Cascade - Nuclear Power for Everybody
网页The actinium series, also known as the actinium cascade, is one of three classical radioactive series beginning with naturally occurring uranium-235. This radioactive decay chain consists of unstable heavy atomic nuclei that decay through a sequence of alpha and beta decays until a stable nucleus is achieved. In the case of the actinium series ...
Isotope data for actinium-227 in the Periodic Table
网页Detailed decay information for the isotope actinium-227 including decay chains and daughter products.
Actinium-227 - isotopic data and properties - ChemLin
网页Properties and data of the isotope 227 Ac. Contents. General Data. Radioactive Decay. Parent Nuclides. NMR Data. Isotones und Isobares. Actinium-227 is the radioisotope of the element actinium, whose atomic nucleus has 138 neutrons in addition to the element-specific 89 protons, from which the mass number 227 Ac results.
A study of decay chains of radioactive actinium isotopes
网页2024年1月18日 · In this paper, we systematically studied half-lives of the different decay modes using various theoretical models such as the unified fission model (UFM) and the effective liquid drop model. Beta-decay half-lives were evaluated using semi-empirical formulae available in the literature.
Radioactive Decay Chains - SpringerLink
网页2016年6月3日 · The chapter describes the first observations of radioactivity and the subsequent classifications into decay chains leading to Soddy’s periodic law of the radio-elements. The discovery of all isotopes of the three naturally occurring decay chains are described. Download chapter PDF.
Chemistry of Actinium - Chemistry LibreTexts
网页2023年6月30日 · Samples of actinium quickly decay to thorium and francium. The longest-lived isotope (Ac-227) has a half-life of 21.8 years. The element is obtained as an impurity in pitchblende, an ore mined for its uranium content.
C&EN: IT'S ELEMENTAL: THE PERIODIC TABLE - ACTINIUM
网页Actinium comes into equilibrium with its decay products in about 185 days and then decays, having a half-life of 21.8 years. It is about as dangerous as plutonium. Currently, actinium has no significant commercial applications.
4.2.1: Chemistry of Actinium - Chemistry LibreTexts
网页2023年1月14日 · Samples of actinium quickly decay to thorium and francium. The longest-lived isotope (Ac-227) has a half-life of 21.8 years. The element is obtained as an impurity in pitchblende, an ore mined for its uranium content. One-tenth of one gram of actinium can be recovered from 1 ton of pitchblende!