RT Journal Article
T1 Two-neutron transfer reactions as a tool to study the interplay between shape coexistence and quantum phase transitions
A1 García Ramos, José Enrique
A1 Arias Carrasco, José Miguel
A1 Vitturi, Andrea
AB The atomic mass table presents zones where the structure of the states changes rapidly as afunction of the neutron or proton number. Among them, notable examples are the A ≈ 100 Zrregion, the Pb region around N = 104 neutron midshell or the N ≈ 90 rare-earth region. Theobserved phenomena can be understood in terms either of shape coexistence or quantum phasetransitions. The goal of this study is to find an observable that could distinguish between bothphenomena, shape coexistence and quantum phase transitions. The selected observable to beanalyzed is the two-neutron transfer intensity between the 0 + states in the parent and daughternuclei. The framework in which the study is done is the Interacting Boson Model (IBM), includingits version with configuration mixing (IBM-CM). In order to generate the wave functions of theisotope chains of interest, needed for calculating transfer intensities, previous systematic studieswith IBM and IBM-CM are taken without changing the parameters. Results for two-neutrontransfer intensities are presented for Zr, Hg and Pt isotopic chains using IBM-CM and, moreover,the same is done for Zr, Pt and Sm isotopic chains using IBM with just a single configuration, i.e.,without using configuration mixing. In the case of Zr, the two-neutron transfer intensities betweenthe ground states provide a clear observable indicating that normal and intruder configurationscoexist in the low-lying spectrum and that they cross at A = 98 → 100, and this could allow todisentangle whether or not shape coexistence is inducing a given QPT. In the case of Pt, whereshape coexistence is present and the regular and the intruder configurations cross for the groundstate, there is almost no influence in the value of the two-neutron transfer, neither in the case ofHg where the ground state always has regular nature. For the Sm isotope chain that is one of thequantum phase transition paradigms, the value of the two-neutron transfer is strongly affected.
PB IOP Publishing
SN 2058-6132
SN 1674-1137
YR 2020
FD 2020
LK http://hdl.handle.net/10272/18600
UL http://hdl.handle.net/10272/18600
LA eng
NO García-Ramos, J. E., Arias, J. M., & Vitturi, A. (2020). Two-neutron transfer reactions as a tool to study the interplay between shape coexistence and quantum phase transitions. Chinese Physics C, 44(12), 124101. https://doi.org/10.1088/1674-1137/abb4ca
NO This workhas been partially supported by the Ministerio de Ciencia e Innovación (Spain) underprojects number FIS2017-88410-P, PID2019-104002GB-C21 and PID2019-104002GB-C22,by the Consejerı́a de Economı́a, Conocimiento, Empresas y Universidad de la Junta deAndalucı́a (Spain) under Group FQM-160 (JMA) and FQM-370 (JEGR), by the EuropeanRegional Development Fund (ERDF), ref. SOMM17/6105/UGR, and by the European Com-mission, ref. H2020-INFRAIA-2014-2015 (ENSAR2). Resources supporting this work wereprovided by the CEAFMC and the Universidad de Huelva High Performance Computer(HPC@UHU) funded by ERDF/MINECO project UNHU-15CE-2848.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026