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Title

The nuclear structure of Th-229

AuthorsGulda, K.; Kurcewicz, W.; Aas, A. J.; García Borge, María José CSIC ORCID; Burke, D. G.; Fogelberg, B.; Grant, I. S.; Hagebø, E.; Kaffrell, N.; Kvasil, J.; Løvhøiden, G.; Mach, H.; Mackova, A.; Martínez Pérez, Trinitario; Nyman, G.; Rubio, Berta CSIC ORCID; Taín, José Luis CSIC ORCID; Tengblad, Olof CSIC ORCID ; Thorsteinsen, T. F.
KeywordsRadioactivity Th-229 from decay chain of Fr-229, Fr-229 from Th-232(p,4p) and U-238(p,6p4n)
Mass separation
Measured E-γ, I-γ, Ee, I(ce), T(1/2), ATD βγγ(t), eγ-coincidence, γγ-coincidence
Th-229 deduced levels, ICC, multipolarities, I-π, rotational bands, B(XL), dipole moments
Ge,
Si(Li)
Plastic
BaF2 detectors
Mini-orange spectrometer
[PACS] Properties of nuclei; nuclear energy levels
[PACS] Electromagnetic transitions
[PACS] γ transitions and level energies
[PACS] Internal conversion and extranuclear effects (including Auger electrons and internal bremsstrahlung)
Issue Date20-May-2002
PublisherElsevier
CitationNuclear Physics A 703(1-2): 45–69 (2002)
AbstractThe γ-rays following the β- decay of Ac-229 have been investigated by means of γ-ray singles and γγ-coincidence measurements using Ge detectors. Multipolarities of 40 transitions in Th-229 have been established by measuring conversion electrons with a mini-orange electron spectrometer. The half-lives of the 146.35, 164.53 and 261.96 keV levels have been measured using the advanced time delayed betagammagamma(t) method. The low-lying states in Th-229 and observed transition rates have been interpreted within the quasiparticle-phonon model with inclusion of Coriolis coupling. Two octupole correlated parity partner bands, with K-π = 5/2(±) and K-π = 3/2(±), were identified in Th-229.
Description25 pages, 5 tables, 9 figures.-- PACS nrs.: 21.10.-k; 23.20.-g; 23.20.Lv; 23.20.Nx.-- Available online Dec 5, 2001.
Publisher version (URL)http://dx.doi.org/10.1016/S0375-9474(01)01456-7
URIhttp://hdl.handle.net/10261/9729
DOI10.1016/S0375-9474(01)01456-7
ISSN0375-9474
Appears in Collections:(CFMAC-IEM) Artículos
(IFIC) Artículos

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