| Autor: |
Nummela, Saara, Nowacki, F., Baumann, P., Caurier, E., Cederkäll, J., Courtin, S., Dessagne, P., Jokinen, Ari, Knipper, A., Scornet, G. Le, Lyapin, L. G., Miehé, Ch., Oinonen, M., Poirier, E., Radivojevic, Zoran, Ramdhane, M., Trzaska, Wladyslaw, Walter, G., Äystö, Juha, Collaboration, ISOLDE |
| Jazyk: |
angličtina |
| Rok vydání: |
2001 |
| Předmět: |
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| Popis: |
The 33 Na β decay was studied online using mass separation techniques and a first description of the level structure of the neutron-rich isotope 33 Mg , with N = 21 , has been obtained. The experiment involved the measurement of β-γ, β-γ-γ, and β − n − γ coincidences as well as neutron spectra by time-of-flight technique. The first low energy level scheme for the daughter nucleus 33 Mg is given with five bound states. Spin and parity assignments are proposed according to β feedings and γ-ray multipolarities. β-strength distribution is evaluated, taking into account 1 n - and 2 n -emission channels and it is compared with the calculated GT strength distribution. In particular, the 1 p − 1 h and 2 p − 2 h excitations are shown to result in substantial contribution to the low energy configurations. Allowed β branch to the 33 Mg g.s. [ log f t = 5.27 ( 26 ) ] gives direct evidence for the inversion of ν ( f 7 / 2 ) and ν ( d 3 / 2 ) states. peerReviewed |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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