| Hlavná stránka > On the $\beta$-decay of $^{9}$C |
| Article | |
| Title | On the $\beta$-decay of $^{9}$C |
| 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 |
| 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 $\beta$-decay experiments on $^{9}$C at CERN/ISOLDE the $\beta$-strength was determined to the ground state, the 12.2 MeV excited state and the isobaric analog state (IAS) at 14.655 MeV in $^{9}$B. A large $\beta$-strength asymmetry is deduced for the mirror transitions of $^{9}$C and $^{9}$Li 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 $^{5}$Li and $^{8}$Be. 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 $\beta$-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). |