منابع مشابه
Discovery of the astatine, radon, francium, and radium isotopes
Currently, thirty-nine astatine, thirty-nine radon,??? isotopes have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented. ∗Corresponding author. Email address: [email protected] (M. Thoennessen) Preprint submitted to Atomic Data and Nuclear ...
متن کاملCondensed astatine: monatomic and metallic.
The condensed matter properties of the nominal terminating element of the halogen group with atomic number 85, astatine, are as yet unknown. In the intervening more than 70 years since its discovery significant advances have been made in substrate cooling and the other techniques necessary for the production of the element to the point where we might now enquire about the key properties astatin...
متن کاملCluster radioactivity of Th isotopes in the mean-field HFB theory.
L. M. ROBLEDO, M. WARDA a Departamento de F́ısica Teórica C-XI, Universidad Autónoma de Madrid, 28-049 Madrid, Spain b Departament d’Estructura i Constituents de la Matèria and Institut de Ciències del Cosmos, Facultat de F́ısica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain c Katedra Fizyki Teoretycznej, Uniwersytet Marii Curie–Sk lodowskiej, ul. Radziszewskiego 10, 20-031 Lubl...
متن کاملAstatine standard redox potentials and speciation in acidic medium.
A combined experimental and theoretical approach is used to define astatine (At) speciation in acidic aqueous solution and to answer the two main questions raised from literature data: does At(0) exist in aqueous solution and what is the chemical form of At(+III), if it exists. The experimental approach considers that a given species is characterized by its distribution coefficient (D) experime...
متن کاملTwo-proton radioactivity of 45Fe.
In an experiment at the SISSI-LISE3 facility of GANIL, the decay of the proton drip line nucleus 45Fe has been studied. Fragment-implantation events have been correlated with radioactive decay events in a 16x16 pixel silicon-strip detector. The decay-energy spectrum of 45Fe implants shows a distinct peak at (1.14+/-0.04) MeV with a half-life of T(1/2)=(4.7(+3.4)(-1.4)) ms. None of the events in...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1951
ISSN: 0031-899X
DOI: 10.1103/physrev.82.13