Lica, R, Rotaru, F, Borge, MJG, Grevy, S, Negoita, F, Poves, A, Sorlin, O, Andreyev, AN, Borcea, R, Costache, C et al (show 46 more authors)
(2019)
Normal and intruder configurations in $^{34}$Si populated in the
$β^-$ decay of $^{34}$Mg and $^{34}$Al.
Physical Review C (Nuclear Physics), 100 (3).
Text
34Si_final_accepted.pdf - Author Accepted Manuscript Download (1MB) | Preview |
Abstract
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.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | nucl-ex, nucl-ex |
Depositing User: | Symplectic Admin |
Date Deposited: | 17 Sep 2019 10:17 |
Last Modified: | 19 Jan 2023 00:26 |
DOI: | 10.1103/PhysRevC.100.034306 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3054939 |