Title
| On the β-decay of 9C |
Author(s)
|
Bergmann, U C ; García-Borge, M J ; Boutami, R ; Fraile-Prieto, L M ; Fynbo, H O U ; Hornshøj, P ; Jonson, B ; Markenroth, K G ; Martel, I ; Mukha, I ; Nilsson, T ; Nyman, G H ; Oberstedt, A ; Prezado-Alonso, Y ; Riisager, K ; Simon, H ; Tengblad, O ; Wenander, F ; Wilhelmsen-Rolander, K ISOLDE Collaboration Show all 19 authors |
Affiliation
| (CERN) |
Publication
| 2001 |
Imprint
| 2001 |
In:
| Nucl. Phys. A 692 (2001) 427-50 |
DOI
| 10.1016/S0375-9474(01)00650-9
|
Subject category
| Nuclear Physics - Experiment |
Accelerator/Facility, Experiment
| CERN ISOLDE ; IS361 |
Abstract
| In β-decay experiments on 9C at CERN/ISOLDE the β-strength was determined to the ground state, the 12.2 MeV excited state and the isobaric analog state (IAS) at 14.655 MeV in 9B. A large β-strength asymmetry is deduced for the mirror transitions of 9C and 9Li to states around 12 MeV excitation energy. A satisfactory description of the three-body decay from a narrow energy region around the 12.2 MeV resonance is obtained within a sequential model involving the ground and first-excited states of 5Li and 8Be. From the study of angular correlations the spin of the 12.2 MeV state is determined as 5/2−. For the first time the population of the IAS is observed in β-decay and new information on the decay of this state is obtained. The advantages of a closely packed, highly segmented detector setup are demonstrated. (30 refs). |