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

Hyde, Earl K.; Ghiorso, A.

doi:10.1103/physrev.90.267

Cited by 32 publications

(6 citation statements)

References 13 publications

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“…A branching ratio of b α ð 219 AtÞ ¼ 93.6ð10Þ% is found. It is in reasonable agreement with the previous estimate of approximately 97% [78] that was determined in the study of the α decay of natural 227 Ac samples.…”

Section: Branching Ratiossupporting

confidence: 93%

In-Source Laser Spectroscopy with the Laser Ion Source and Trap: First Direct Study of the Ground-State Properties ofPo217,219

Fink¹,

Cocolios²,

Andreyev³

et al. 2015

Phys. Rev. X

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A Laser Ion Source and Trap (LIST) for a thick-target, isotope-separation on-line facility has been implemented at CERN ISOLDE for the production of pure, laser-ionized, radioactive ion beams. It offers two modes of operation, either as an ion guide, which performs similarly to the standard ISOLDE resonance ionization laser ion source (RILIS), or as a more selective ion source, where surface-ionized ions from the hot ion-source cavity are repelled by an electrode, while laser ionization is done within a radiofrequency quadrupole ion guide. The first physics application of the LIST enables the suppression of francium contamination in ion beams of neutron-rich polonium isotopes at ISOLDE by more than 1000 with a reduction in laser-ionization efficiency of only 20. Resonance ionization spectroscopy is performed directly inside the LIST device, allowing the study of the hyperfine structure and isotope shift of 217 Po for the first time. Nuclear decay spectroscopy of 219 Po is performed for the first time, revealing its half-life, α-to-β-decay branching ratio, and α-particle energy. This experiment demonstrates the applicability of the LIST at radioactive ion-beam facilities for the production and study of pure beams of exotic isotopes.

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Section: Branching Ratiossupporting

confidence: 93%

In-Source Laser Spectroscopy with the Laser Ion Source and Trap: First Direct Study of the Ground-State Properties ofPo217,219

Fink¹,

Cocolios²,

Andreyev³

et al. 2015

Phys. Rev. X

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“…In this case the population of 215 Po occurs through the population of ground state of 215 Bi. Lifetimes for 219 Bi and 219 At are 33(6) s [3] and 54(6) s [11], respectively. The half life of 219 Po has not been measured yet, though FRDM+QRPA calculations estimate it around 17 s [12].…”

Section: Half-lives Determinationmentioning

confidence: 99%

Half-lives of heavy nuclei throughαtagging

Morales

2014

EPJ Web of Conferences

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“…Results on the β decays [211][212][213] Tl → 211-213 Pb, 215 Pb → 215 Bi, and [215][216][217][218][219] Bi → 215-219 Po are presented and discussed here. Earlier investigations on some of the cited nuclei exploited deep-inelastic [17] and transfer [18,19] reactions, α decay [2,[20][21][22][23][24], and β decay [9,10,[12][13][14]25]. In particular, this work reports on the first spectroscopic information on 213 Pb and 219 Po.…”

Section: Introductionmentioning

confidence: 99%

β-decay studies of neutron-rich Tl, Pb, and Bi isotopes

Morales¹,

Benzoni²,

Gottardo³

et al. 2014

Phys. Rev. C

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The fragmentation of relativistic uranium projectiles has been exploited at the Gesellschaft für Schwerionenforschung laboratory to investigate the β decay of neutron-rich nuclei just beyond 208 Pb. This paper reports on β-delayed γ decays of [211][212][213] Tl, 215 Pb, and 215-219 Bi de-exciting states in the daughters 211-213 Pb, 215 Bi, and 215-219 Po. The resulting partial level schemes, proposed with the help of systematics and shell-model calculations, are presented. The role of allowed Gamow-Teller and first-forbidden β transitions in this mass region is discussed.

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

Cited by 32 publications

References 13 publications

In-Source Laser Spectroscopy with the Laser Ion Source and Trap: First Direct Study of the Ground-State Properties ofPo217,219

In-Source Laser Spectroscopy with the Laser Ion Source and Trap: First Direct Study of the Ground-State Properties ofPo217,219

Half-lives of heavy nuclei throughαtagging

β-decay studies of neutron-rich Tl, Pb, and Bi isotopes

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