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 ...
Actinium-228 - isotopic data and properties - ChemLin
网页Actinium-228 is a radioisotope of the chemical element actinium discovered by Otto Hahn in 1906, which has 139 neutrons in the atomic nucleus in addition to element-specific 89 protons, resulting in the mass number 228 .
Actinium - Wikipedia
网页Actinium is found only in traces in uranium and thorium ores as the isotope 227 Ac, which decays with a half-life of 21.772 years, predominantly emitting beta and sometimes alpha particles, and 228 Ac, which is beta active with a half-life of 6.15 hours.
Preparation of an Actinium-228 Generator | Inorganic Chemistry
网页2020年2月16日 · To address these issues, we developed a method for isolating an actinium isotope (228 Ac) whose nuclear properties are well-suited for γ-spectroscopy. This four-step procedure isolates 228 Ra from naturally occurring 232 Th.
网页Actinium-228 is a member of the thorium series (4n) which is of terrestrial origin and nearly constant with weather condition^'^'. The complicated decay scheme of zzEAc and the large number of y-lines emitted, make it a candidate for continuous research to establish the most accurate energy levels and other character- isticsC6).
Isotope data for actinium-228 in the Periodic Table
网页Detailed decay information for the isotope actinium-228 including decay chains and daughter products.
网页In terms of nuclear spectroscopy, many actinium isotopes (225Ac and 227Ac) are equally “unfriendly” because the actinium α-, β-, and γ-emissions are difficult to resolve from the actinium daughters. To address these issues, we developed a method for isolating an actinium isotope (228Ac) whose nuclear properties are well-suited for γ-
Generator of Actinium-228 and a Study of the Sorption of Actinium …
网页2020年10月26日 · The resulting 228 Ac was used in the study to examine its sorption on commercial and modified carbon nanomaterials (CNMs) instead of the difficultly accessible 225 Ac. It is shown that the application of CNMs as carriers of actinium isotopes for nuclear medicine purposes is promising.
Preparation of an Actinium-228 Generator - PubMed
网页2020年3月2日 · To address these issues, we developed a method for isolating an actinium isotope (228 Ac) whose nuclear properties are well-suited for γ-spectroscopy. This four-step procedure isolates 228 Ra from naturally occurring 232 Th. The relatively long-lived 228 Ra (t 1/2 = 5.75(3) years) radioisotope subsequently decays to 228 Ac.
Preparation of an Actinium-228 Generator - ACS Publications
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