Nuclear Data Sheets for A=219

doi:10.1016/j.nds.2021.06.002

Nuclear Data Sheets

Volume 175, July–August 2021, Pages 150-268

https://doi.org/10.1016/j.nds.2021.06.002 Get rights and content

Abstract

Evaluated experimental structure and decay data are presented for 12 known nuclides of mass 219 (Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, Np). Recommended values are given for level parameters, γ and α radiations, and other spectroscopic information. No excited states are known in ²¹⁹Bi, ²¹⁹Po, ²¹⁹Pa, ²¹⁹U and ²¹⁹Np. Except for isotopic identification, no information about its half-life or decay characteristics is available for ²¹⁹Pb. For ²¹⁹Po, several γ rays have been reported from the decay of ²¹⁹Bi β⁻ decay, but no level scheme has been proposed. For ²¹⁹At, only four excited states are known from α decay of ²²³Fr. For ²¹⁹Rn and ²¹⁹Fr, only the low-spin states are known from α decays of ²²³Ra and ²²³Ac, respectively. For ²¹⁹Ra, ²¹⁹Ac and ²¹⁹Th, mainly the data for high-spin states are available from in-beam γ-ray studies. For ²¹⁹Ra, high-spin data are available from 2017He15, 1992Wi02 and 1987Co36, but evaluators find significant differences in relative photon branchings between the three studies. Detailed comments are given in the Adopted dataset for this nuclide. Half-lives of excited states are known only for seven levels in ²¹⁹Rn, thus there is a general lack of knowledge about γ-ray transition probabilities. This work supersedes data in the previous evaluations of A=219 published by 2001Br31, 1992Br10 and 1977Ma30.

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Cited by (4)

Half-life determination of <sup>215</sup>At and <sup>221</sup>Ra with high-purity radioactive ion beams
2024, Applied Radiation and Isotopes
At CERN-ISOLDE, high-purity radioactive ion beams of ²¹⁹Fr and ²²¹RaF were investigated with $α$ -decay spectroscopy at the CRIS and ASET experiments in the course of three different experimental campaigns. The half-life of ²¹⁵At, $α$ -decay daughter of ²¹⁹Fr, is measured to be 36.3(3)[9] $μ s$ , and that of ²²¹Ra was determined to be 26.2(1)[6] s, both of which are well in line with the trends in this region of the nuclear landscape but at odds with some of the reported literature.
KATRIN background due to surface radioimpurities
2022, Astroparticle Physics
The goal of the KArlsruhe TRItrium Neutrino (KATRIN) experiment is the determination of the effective electron antineutrino mass with a sensitivity of 0.2 eV/c² at 90 % C.L.¹. This goal can only be achieved with a very low background level in the order of 10 mcps² in the detector region of interest. A possible background source are $α$ -decays on the inner surface of the KATRIN Main Spectrometer. Rydberg atoms, produced in sputtering processes accompanying the $α$ -decays, are not influenced by electric or magnetic fields and freely propagate inside the vacuum of the Main Spectrometer. Here, they can be ionized by thermal radiation and the released electrons directly contribute to the KATRIN background. Two $α$ -sources, ²²³Ra and ²²⁸Th, were installed at the Main Spectrometer with the purpose of temporarily increasing the background in order to study $α$ -decay induced background processes. In this paper, we present a possible background generation mechanism and measurements performed with these two radioactive sources. Our results show a clear correlation between $α$ -activity on the inner spectrometer surface and background from the volume of the spectrometer. Two key characteristics of the Main Spectrometer background – the dependency on the inner electrode offset potential, and the radial distribution – could be reproduced with this artificially induced background. These findings indicate a high contribution of $α$ -decay induced events to the residual KATRIN background.
Level structure of Ac 221 and Fr 217 from decay spectroscopy, and reflection asymmetry in Ac 221
2023, Physical Review C
Single-particle states and parity doublets in odd- Z Ac 221 and Pa 225 from α -decay spectroscopy
2022, Physical Review C

^☆: Work at McMaster was partially supported by the Office of Nuclear Physics, Office of Science, U.S. Department of Energy through Brookhaven National Laboratory

¹: Coordinators

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Nuclear Data Sheets for A=219☆

Abstract

Nuclear Phys.

Nucl. Phys.

J. Inorg. Nucl. Chem.

J. Inorg. Nucl. Chem.

Nucl. Phys. A

Nucl. Phys. A

Nucl. Instrum. Methods

At. Data Nucl. Data Tables

Nucl. Instrum. Methods

Nucl. Phys. A

Nucl. Instrum. Methods

Nucl. Data Sheets

Nucl. Data Sheets

Phys. Lett. B

Nucl. Phys. A

At. Data Nucl. Data Tables

Nucl. Data Sheets

Nucl. Instrum. Methods Phys. Res. A

Phys. Lett. B

Nucl. Data Sheets

Nucl. Data Sheets

Nucl. Instrum. Methods Phys. Res. A

The Radioactive Constants as of 1930 Report of the International Radium-Standards Commission

Revs. Modern Phys.

Artificial Collateral Chains to the Thorium and Actinium Families

Phys. Rev.

Artificial Chains Collateral to the Heavy Radioactive Families

Phys. Rev.

Further Work on Heavy Collateral Radioactive Chains

Phys. Rev.

The Alpha-Branching of AcK and the Presence of Astatine in Nature

Phys. Rev.

Half-Life Determinations of Radium-223 and Thorium-227

Phys. Rev.

Evolution de l'Activite α d'Une Source d'Actinium K (223Fr)

Compt. Rend.

Sur la Descendance de l'Actinium K: 223Fr

J. Phys. Radium

Zum Zurfall des AcX (Ra223)

Helv. Phys. Acta

Nuclear Decay Schemes in the Actinium Family

Nuclear Decay Studies of Protactinium Isotopes

Comparaison des Methodes de Microcalorimetrie Adiabatique et d'Ionisation Differentielle dans les Mesures Precises de Periodes Radioactives

Ann. Phys. (Paris)

Ein Verfahren zur Bestimmung von Halbwertszeiten kurzlebiger gasformiger Radioisotope. Die Halbwertszeiten des Thorons (220Rn) und Actinons (219Rn)

Z. Naturforsch a

Absolute Measurement of the Energy of the Most Important Natural Alpha Emitters

Helv. Phys. Acta

Intensity Measurements of Alpha Groups from 211Bi, 211Po, 219Rn and 223Ra by Means of Solid State Counter Techniques

Nuovo Cimento

Alpha Decay Studies of Protactinium Isotopes

The Nuclear Properties of the Heavy Elements, Vol. II

Half-Lives of Actinium-227 and Thorium-227 Measured Calorimetrically

Etude des Niveaux de 220Fr, 219Fr, 216At et 215At

J. Phys. (Paris)

Etude du Spectre γ Emis par le Radium-223 et Ses Derives

Compt. Rend. B

Schema des Niveaux de 219Rn

J. Phys. (Paris)

Determination du Moment Angulaire de Quelques Etats du Radon 219 et du Polonium 215

J. Phys. (Paris)

Alpha Decay of 227U

Phys. Rev.

Etude des Schemas de Niveaux de Quelques Noyaux de Transition de Z Impair, Alimentes par Emission Alpha

Production and Decay Properties of Protactinium Isotopes of Mass 222 to 225 Formed in Heavy-Ion Reactions

Phys. Rev. C

Alpha-Gamma Linear Polarization Measurements in the Decay of 223Ra → 219Rn

Evolution de l'Activite α d'Une Source d'Actinium K (²²³Fr)

Sur la Descendance de l'Actinium K: ²²³Fr

Zum Zurfall des AcX (Ra²²³)

Ein Verfahren zur Bestimmung von Halbwertszeiten kurzlebiger gasformiger Radioisotope. Die Halbwertszeiten des Thorons (²²⁰Rn) und Actinons (²¹⁹Rn)

Intensity Measurements of Alpha Groups from ²¹¹Bi, ²¹¹Po, ²¹⁹Rn and ²²³Ra by Means of Solid State Counter Techniques

Etude des Niveaux de ²²⁰Fr, ²¹⁹Fr, ²¹⁶At et ²¹⁵At

Schema des Niveaux de ²¹⁹Rn

Alpha Decay of ²²⁷U

Alpha-Gamma Linear Polarization Measurements in the Decay of ²²³Ra → ²¹⁹Rn