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

0508843 - ÚJF 2020 RIV US eng J - Journal Article
Lica, R. - Rotaru, F. - Borge, M. J. G. - Grévy, S. - Negoita, F. - Poves, A. - Sorlin, O. - Andreyev, A. N. - Borcea, R. - Costache, C. - De Witte, H. - Fraile, L. M. - Greenlees, P. T. - Huyse, M. - Ionescu, A. - Kisyov, S. - Konki, J. - Lazarus, I. - Madurga, M. - Marginean, N. - Marginean, R. - Mihai, C. - Mihai, R. E. - Negret, A. - Nowacki, F. - Page, R. D. - Pakarinen, J. - Pucknell, V. - Rahkila, P. - Rapisarda, E. - Serban, A. - Sotty, C. O. - Stan, L. - Stanoiu, M. - Tengblad, O. - Turturica, A. - Van Duppen, P. - Warr, N. - Dessagne, P. - Stora, T. - Borcea, C. - Calinescu, S. - Daugas, J. M. - Filipescu, D. - Kuti, I. - Franchoo, S. - Gheorghe, I. - Morfouace, P. - Morel, P. - Mrázek, Jaromír - Pietreanu, D. - Sohler, D. - Stefan, I. - Suvaila, R. - Toma, S. - Ur, C. A.
Normal and intruder configurations in Si- 34 populated in the beta(-) decay of Mg-34 and Al-34.
Physical Review C. Roč. 100, č. 3 (2019), č. článku 034306. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA MŠMT(CZ) EF16_013/0001679; GA MŠMT LM2015076
Institutional support: RVO:61389005
Keywords : Si-34 * spectroscopic properties * shell model
OECD category: Nuclear physics
Impact factor: 2.988, year: 2019
Method of publishing: Open access
https://doi.org/10.1103/PhysRevC.100.034306

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).
Permanent Link: http://hdl.handle.net/11104/0299645