The nuclear structure of Th-229
| Autor: | Gulda, K., Kurcewicz, W., Aas, A. J., García Borge, María José, 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, Taín, José Luis, Tengblad, Olof, Thorsteinsen, T. F. |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Mini-orange spectrometer
Ge Mass separation Th-229 deduced levels ICC multipolarities I-π rotational bands B(XL) dipole moments nuclear energy levels [PACS] γ transitions and level energies Radioactivity Th-229 from decay chain of Fr-229 Fr-229 from Th-232(p 4p) and U-238(p 6p4n) Plastic [PACS] Internal conversion and extranuclear effects (including Auger electrons and internal bremsstrahlung) [PACS] Properties of nuclei [PACS] Electromagnetic transitions Si(Li) BaF2 detectors Measured E-γ I-γ Ee I(ce) T(1/2) ATD βγγ(t) eγ-coincidence γγ-coincidence |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 25 pages, 5 tables, 9 figures.-- PACS nrs.: 21.10.-k; 23.20.-g; 23.20.Lv; 23.20.Nx.-- Available online Dec 5, 2001. The 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. This work was supported in part by the Polish Scientific Research Committee, the Swedish Natural Science Research Council, the Norwegian Research Council, the Spanish CICYT under contracts AEN94–0833-C02–02 and AEN96–1662, the Canadian Natural Sciences and Engineering Research Council, the Grant Agency of Czech Republic under the contract 202/99/1718, and UK Engineering and Physical Science Research Council. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|