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Persistence of octupole correlations in $^{231}/Ra$
The structure of /sup 231/Ra, the heaviest odd Ra nucleus currently accessible for detailed spectroscopic investigation, has been studied in the beta /sup -/ decay of /sup 231/Fr. The main purpose has been to verify whether fast B(E1) rates and significant octupole correlations recently established...
| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2001
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0375-9474(00)00572-8 http://cds.cern.ch/record/513308 |
| _version_ | 1780897571025190912 |
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| author | Fraile-Prieto, L M García-Borge, M J Mach, H Boutami, R Aas, A J Fogelberg, B Gracía-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J López, M J Løvhøiden, G Martínez, T Rubio, B Taín, J L Tengblad, O |
| author_facet | Fraile-Prieto, L M García-Borge, M J Mach, H Boutami, R Aas, A J Fogelberg, B Gracía-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J López, M J Løvhøiden, G Martínez, T Rubio, B Taín, J L Tengblad, O |
| author_sort | Fraile-Prieto, L M |
| collection | CERN |
| description | The structure of /sup 231/Ra, the heaviest odd Ra nucleus currently accessible for detailed spectroscopic investigation, has been studied in the beta /sup -/ decay of /sup 231/Fr. The main purpose has been to verify whether fast B(E1) rates and significant octupole correlations recently established in /sup 229/Ra persist in /sup 231 /Ra, The excited states in /sup 231/Ra have been determined for the first time. Spins and parities have been deduced from conversion electron measurements, while level half-lives in the ps and ns ranges have been measured with the Advanced Time Delayed beta gamma gamma (t) method. The moderately fast B(E1) rates found for transitions connecting the lowest-lying K/sup pi /=5/2/sup +or-/ and K/sup pi /=1 /2/sup +or-/ bands, reveal the persistence of octupole collective effects in /sup 231/Ra, although the B(E1) rates are lower than in /sup 229/Ra. These findings reinforce the differences in the B(E1) systematics between isotonic Ra and Th nuclei. (42 refs). |
| id | cern-513308 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2001 |
| record_format | invenio |
| spelling | cern-5133082019-09-30T06:29:59Zdoi:10.1016/S0375-9474(00)00572-8http://cds.cern.ch/record/513308engFraile-Prieto, L MGarcía-Borge, M JMach, HBoutami, RAas, A JFogelberg, BGracía-Raffi, L MGrant, I SGulda, KHagebø, EKurcewicz, WKvasil, JLópez, M JLøvhøiden, GMartínez, TRubio, BTaín, J LTengblad, OPersistence of octupole correlations in $^{231}/Ra$Nuclear PhysicsThe structure of /sup 231/Ra, the heaviest odd Ra nucleus currently accessible for detailed spectroscopic investigation, has been studied in the beta /sup -/ decay of /sup 231/Fr. The main purpose has been to verify whether fast B(E1) rates and significant octupole correlations recently established in /sup 229/Ra persist in /sup 231 /Ra, The excited states in /sup 231/Ra have been determined for the first time. Spins and parities have been deduced from conversion electron measurements, while level half-lives in the ps and ns ranges have been measured with the Advanced Time Delayed beta gamma gamma (t) method. The moderately fast B(E1) rates found for transitions connecting the lowest-lying K/sup pi /=5/2/sup +or-/ and K/sup pi /=1 /2/sup +or-/ bands, reveal the persistence of octupole collective effects in /sup 231/Ra, although the B(E1) rates are lower than in /sup 229/Ra. These findings reinforce the differences in the B(E1) systematics between isotonic Ra and Th nuclei. (42 refs).oai:cds.cern.ch:5133082001 |
| spellingShingle | Nuclear Physics Fraile-Prieto, L M García-Borge, M J Mach, H Boutami, R Aas, A J Fogelberg, B Gracía-Raffi, L M Grant, I S Gulda, K Hagebø, E Kurcewicz, W Kvasil, J López, M J Løvhøiden, G Martínez, T Rubio, B Taín, J L Tengblad, O Persistence of octupole correlations in $^{231}/Ra$ |
| title | Persistence of octupole correlations in $^{231}/Ra$ |
| title_full | Persistence of octupole correlations in $^{231}/Ra$ |
| title_fullStr | Persistence of octupole correlations in $^{231}/Ra$ |
| title_full_unstemmed | Persistence of octupole correlations in $^{231}/Ra$ |
| title_short | Persistence of octupole correlations in $^{231}/Ra$ |
| title_sort | persistence of octupole correlations in $^{231}/ra$ |
| topic | Nuclear Physics |
| url | https://dx.doi.org/10.1016/S0375-9474(00)00572-8 http://cds.cern.ch/record/513308 |
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