| Autor: |
Lica, R, Rotaru, F, Borge, MJG, Grevy, S, Negoita, F, Poves, A, Sorlin, O, Andreyev, AN, Borcea, R, Costache, C, Witte, H De, Fraile, LM, Greenlees, PT, Huyse, M, Ionescu, A, Kisyov, S, Konki, J, Lazarus, I, Madurga, M, Marginean, N, Marginean, R, Mihai, C, Mihai, RE, Negret, A, Nowacki, F, Page, RD, Pakarinen, J, Pucknell, V, Rahkila, P, Rapisarda, E, Serban, A, Sotty, CO, Stan, L, Stanoiu, M, Tengblad, O, Turturica, A, Duppen, P Van, Warr, N, Dessagne, Ph, Stora, T, Borcea, C, Calinescu, S, Daugas, JM, Filipescu, D, Kuti, I, Franchoo, S, Gheorghe, I, Morfouace, P, Morel, P, Mrazek, J, Pietreanu, D, Sohler, D, Stefan, I, Suvaila, R, Toma, S, Ur, CA |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Zdroj: |
Physical Review C (Nuclear Physics) |
| Popis: |
The structure of $^{34}$Si was studied through $\gamma$ spectroscopy separately in the $\beta^-$ decays of $^{34}$Mg and $^{34}$Al at the ISOLDE facility of CERN. Different configurations in $^{34}$Si were populated independently from the two recently identified $\beta$-decaying states in $^{34}$Al having spin-parity assignments $J^\pi = 4^-$ dominated by the normal configuration $\pi (d_{5/2})^{-1} \otimes \nu (f_{7/2})$ and $J^\pi = 1^+$ by the intruder configuration $\pi (d_{5/2})^{-1} \otimes \nu (d_{3/2})^{-1}(f_{7/2})^{2}$. The paper reports on spectroscopic properties of $^{34}$Si such as an extended level scheme, spin and parity assignments based on log($ft$) values and $\gamma$-ray branching ratios, absolute $\beta$ feeding intensities and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of $^{34}$Si. Large scale shell-model calculations using the {\sc sdpf-u-mix} interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of {\sc sdpf-u-mix}, the $N=20$ shell gap, the level of mixing between normal and intruder configurations for the 0$_1^+$, 0$_2^+$ and 2$_1^+$ states and the absence of triaxial deformation in $^{34}$Si. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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