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Octupole correlations in $^{229}Ra$
The structure of /sup 229/Ra has been studied in the beta /sup -/ decay of /sup 229/Fr. Spins and parities have been determined from the conversion electron measurements, while half-lives for the 137.5, 142.7, 168.8, 213.0 and 479.0 keV levels have been measured in the ps and ns ranges via the fast...
| Autores principales: | , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
1999
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0375-9474(99)00330-9 http://cds.cern.ch/record/419538 |
| _version_ | 1780894794687447040 |
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| author | Fraile-Prieto, L M Aas, A J García-Borge, M J Fogelberg, B García-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J Løvhøiden, G Mach, H Mackova, A Martínez, T Rubio, B Taín, J L Teijeiro, A G Tengblad, O Thorsteinsen, T F |
| author_facet | Fraile-Prieto, L M Aas, A J García-Borge, M J Fogelberg, B García-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J Løvhøiden, G Mach, H Mackova, A Martínez, T Rubio, B Taín, J L Teijeiro, A G Tengblad, O Thorsteinsen, T F |
| author_sort | Fraile-Prieto, L M |
| collection | CERN |
| description | The structure of /sup 229/Ra has been studied in the beta /sup -/ decay of /sup 229/Fr. Spins and parities have been determined from the conversion electron measurements, while half-lives for the 137.5, 142.7, 168.8, 213.0 and 479.0 keV levels have been measured in the ps and ns ranges via the fast timing beta gamma gamma (t) method. Our data confirm the previous results and enrich the knowledge of the structure of this nucleus by 25 new states and several strong transitions. Structural similarities are established between /sup 229 /Ra and its N=141 isotone /sup 231/Th. The experimental results are compared with the theoretical predictions of the quasiparticle-phonon model with inclusion of Coriolis coupling. The reduced transition probabilities, and especially the moderately fast B(E1) rate for the 137.5 keV transition connecting the band-heads of the K/sup pi /=5/2 /sup +or-/ parity doublet bands, reveal the presence of significant octupole correlations in /sup 229/Ra. (44 refs). |
| id | cern-419538 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1999 |
| record_format | invenio |
| spelling | cern-4195382019-09-30T06:29:59Zdoi:10.1016/S0375-9474(99)00330-9http://cds.cern.ch/record/419538engFraile-Prieto, L MAas, A JGarcía-Borge, M JFogelberg, BGarcía-Raffi, L MGrant, I SGulda, KHagebø, EKurcewicz, WKvasil, JLøvhøiden, GMach, HMackova, AMartínez, TRubio, BTaín, J LTeijeiro, A GTengblad, OThorsteinsen, T FOctupole correlations in $^{229}Ra$Nuclear Physics - ExperimentThe structure of /sup 229/Ra has been studied in the beta /sup -/ decay of /sup 229/Fr. Spins and parities have been determined from the conversion electron measurements, while half-lives for the 137.5, 142.7, 168.8, 213.0 and 479.0 keV levels have been measured in the ps and ns ranges via the fast timing beta gamma gamma (t) method. Our data confirm the previous results and enrich the knowledge of the structure of this nucleus by 25 new states and several strong transitions. Structural similarities are established between /sup 229 /Ra and its N=141 isotone /sup 231/Th. The experimental results are compared with the theoretical predictions of the quasiparticle-phonon model with inclusion of Coriolis coupling. The reduced transition probabilities, and especially the moderately fast B(E1) rate for the 137.5 keV transition connecting the band-heads of the K/sup pi /=5/2 /sup +or-/ parity doublet bands, reveal the presence of significant octupole correlations in /sup 229/Ra. (44 refs).oai:cds.cern.ch:4195381999 |
| spellingShingle | Nuclear Physics - Experiment Fraile-Prieto, L M Aas, A J García-Borge, M J Fogelberg, B García-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J Løvhøiden, G Mach, H Mackova, A Martínez, T Rubio, B Taín, J L Teijeiro, A G Tengblad, O Thorsteinsen, T F Octupole correlations in $^{229}Ra$ |
| title | Octupole correlations in $^{229}Ra$ |
| title_full | Octupole correlations in $^{229}Ra$ |
| title_fullStr | Octupole correlations in $^{229}Ra$ |
| title_full_unstemmed | Octupole correlations in $^{229}Ra$ |
| title_short | Octupole correlations in $^{229}Ra$ |
| title_sort | octupole correlations in $^{229}ra$ |
| topic | Nuclear Physics - Experiment |
| url | https://dx.doi.org/10.1016/S0375-9474(99)00330-9 http://cds.cern.ch/record/419538 |
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