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On the β-decay of C-9

Autor Bergmann, U. C.; García Borge, María José ; Boutami, Rafik ; Fraile, Luis M. ; Fynbo, H. O. U.; Hornshøj, P.; Jonson, B.; Markenroth, K.; Martel, Ismael; Mukha, I. ; Nilsson, T.; Nyman, G.; Oberstedt, A.; Prezado, Yolanda ; Riisager, K.; Simon, H.; Tengblad, Olof ; Wenander, F.; Wilhelmsen Rolander, K.
Palabras clave Radioactivity C-9(β(+)) [from O,Ca(p,X)]
Measured β-delayed E-p
Angular correlations
B-9 deduced β-branching strengths
Decay mechanism features
A=9 β-decay asymmetry
Double-sided silicon strip detectors
Mass-separated source
Delayed proton
Nuclear system
Fecha de publicación 24-sep-2001
Serie Nuclear Physics A 692(3-4): 427–450 (2001)
ResumenIn β-decay experiments on C-9 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 B-9. A large β-strength asymmetry is deduced for the mirror transitions of C-9 and Li-9 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 Li-5 and Be-8. 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.
Descripción 24 pages, 9 figures.-- PACS nrs.: 23.40.Hc; 27.20.+n; 24.80.+y.-- Available online 17 August 2001.
Versión del editorhttp://dx.doi.org/10.1016/S0375-9474(01)00650-9
URI http://hdl.handle.net/10261/9819
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