Normal and intruder configurations in Si- 34 populated in the beta(-) decay of Mg-34 and Al-34

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http://hdl.handle.net/10138/312141

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IDS Collaboration & Lica , R 2019 , ' Normal and intruder configurations in Si- 34 populated in the beta(-) decay of Mg-34 and Al-34 ' , Physical Review C , vol. 100 , no. 3 , 034306 . https://doi.org/10.1103/PhysRevC.100.034306

Title: Normal and intruder configurations in Si- 34 populated in the beta(-) decay of Mg-34 and Al-34
Author: IDS Collaboration; Lica, R.
Date: 2019-09-11
Language: eng
Number of pages: 11
Belongs to series: Physical Review C
ISSN: 2469-9985
URI: http://hdl.handle.net/10138/312141
Abstract: The structure of Si-34 was studied through gamma spectroscopy separately in the beta(-) decays of Mg-34 and Al-34 at the ISOLDE facility of CERN. Different configurations in Si-34 were populated independently from the two recently identified beta-decaying states in Al-34 having spin-parity assignments J(pi) = 4(-) dominated by the normal configuration pi(d(5/2))(-1) circle times nu(f(7/2)) and J(pi) = 1(+) by the intruder configuration pi(d(5/2))(-1) circle times nu(d(3/2))(-1) (f(7/2))(2). The paper reports on spectroscopic properties of Si-34 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 Si-34. Large scale shell-model calculations using the 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 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 Si-3(4).
Subject: SHELL-MODEL
ION-SOURCE
STATES
N=20
NUCLEI
114 Physical sciences
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