RT Conference Proceedings T1 The enhancement of deformation in odd-even nuclei around A =100 A1 Maya Barbecho, Esperanza A1 García Ramos, José Enrique AB In this contribution, the shape coexistence phenomenon near the Z=40 proton sub-shell closure is analyzed for both even-even and odd nuclei around neutron number N=60. The onset of deformation is compared in even and odd nuclei using the intrinsic state formalism of the Interacting Boson Fermion Model with configuration mixing, which is presented for the first time in this contribution. The Nb isotopes are studied in detail showing that the onset of deformation can be explained in terms of the crossing of two configurations leading to a Type II Quantum Phase Transition PB EDP Sciences SN 2100-014X (electrónico) YR 2025 FD 2025-04 LK https://hdl.handle.net/10272/25413 UL https://hdl.handle.net/10272/25413 LA eng NO Maya-Barbecho, E., & García-Ramos, J. E. (2025). The enhancement of deformation in odd-even nuclei around A = 100. In A. Gadea, A. Algora, A. Morales, A. Jungclaus, B. Fernández Dominguez, C. Domingo-Pardo, E. Nácher, R. M. Pérez Vidal, S. A. Orrigo, & V. González (Eds.), EPJ Web of Conferences (Vol. 324, p. 00027). EDP Sciences. https://doi.org/10.1051/epjconf/202532400027 NO The authors thank N. Gavrielovand J.M. Arias for useful discussions and also thank N. Gavrielov for providing Nb parameters.This work was partially supported by grant PID2022-136228NB-C21 funded by MCIN/AEI/10.13039/50110001103 and “ERDF A way of making Europe”. EMB thanks economical support from grant AST22-00001-X funded by EU "NextGenerationEU", by MCIN/AEI/10.13039/50110001103, by Consejería de Universidad ,Investigación e Innovación de la Junta de Andalucía and by University of Huelva. Resources support ingthis work were provided by the CEAFMC and Universidad de Huelva High Performance Computer (HPC@UHU) funded by ERDF/MINE-CO project UNHU-15CE-2848 DS Repositorio Institucional de la Universidad de Huelva RD 1 jun 2026