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00925njm 22002777a 4500 dc Illana Sisón, Andrés author Stramaccioni, D. author Valiente-Dobón, J. J. author Rodríguez Frutos, Tomás Raúl author Robledo, L. M. author Poves, A. author Auranen, K. author Beliuskina, O. author Delafosse, C. author Eronen, T. author Ge, Z. author Geldhof, S. author Gins, W. author Grahn, T. author Greenlees, P. T. author Joukainen, H. author Julin, R. author Jutila, H. author Kankainen, A. author Leino, M. author Louko, J. author Luoma, M. author Nesterenko, D. author Ojala, J. author Pakarinen, J. author Rahkila, P. author Ruotsalainen, P. author Sandzelius, M. author Sarén, J. author Uusitalo, J. author Zimba, G. L. author 2023-12-04 This letter reports on the first observation of an octupole band in the neutron-deficient (𝑁 = 𝑍 + 2) nucleus 110Xe. The 110Xe nuclei were produced via the 54Fe(58Ni,2n) fusion-evaporation reaction. The emitted 𝛾 rays were detected using the JUROGAM 3 𝛾-ray spectrometer, while the fusion-evaporation residues were separated with the MARA separator at the Accelerator Laboratory of the University of Jyväskylä, Finland. The experimental observation of the low-lying 3− and 5− states and inter-band E1 transitions between the ground-state band and the octupole band proves the importance of octupole correlations in this region. These new experimental data combined with theoretical calculations using the symmetry-conserving configuration-mixing method, based on a Gogny energy density functional, have been interpreted as an evidence of enhanced octupole correlations in neutron-deficient xenon isotopes. A. Illana, R.M. Pérez-Vidal, D. Stramaccioni, J.J. Valiente-Dobón, T.R. Rodriguez, L.M. Robledo, A. Poves, K. Auranen, O. Beliuskina, C. Delafosse, T. Eronen, Z. Ge, S. Geldhof, W. Gins, T. Grahn, P.T. Greenlees, H. Joukainen, R. Julin, H. Jutila, A. Kankainen, M. Leino, J. Louko, M. Luoma, D. Nesterenko, J. Ojala, J. Pakarinen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, J. Uusitalo, G.L. Zimba, Octupole correlations in the N = Z + 2 = 56 110Xe nucleus, Physics Letters B, Volume 848, 2024, 138371, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2023.138371. 0370-2693 10.1016/j.physletb.2023.138371 https://hdl.handle.net/20.500.14352/102917 1873-2445 https://doi.org/10.1016/j.physletb.2023.138371 https://www.sciencedirect.com/science/article/pii/S0370269323007050 Octupole correlations in the N = Z+2=56 110Xe nucleus