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Corté,s, M.L.,Rodriguez, W.,Doornenbal, P.,Obertelli, A.,Holt, J.D.,Lenzi, S.M.,Mené,ndez, J.,Nowacki, F.,Ogata, K.,Poves, A.,Rodrí,guez, T.R.,Schwenk, A.,Simonis, J.,Stroberg, S.R. North-Holland Pub. Co 2020 Physics letters. Section B Vol.800 No.-
<P><B>Abstract</B></P> <P>Excited states in the N = 40 isotone <SUP>62</SUP>Ti were populated via the <SUP>63</SUP>V ( p , 2 p ) <SUP>62</SUP>Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using <I>γ</I>-ray spectroscopy. The energies of the 2 1 + → 0 gs + and 4 1 + → 2 1 + transitions, observed here for the first time, indicate a deformed <SUP>62</SUP>Ti ground state. These energies are increased compared to the neighboring <SUP>64</SUP>Cr and <SUP>66</SUP>Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for <SUP>62</SUP>Ti show a dominant configuration with four neutrons excited across the N = 40 gap. Likewise, they indicate that the N = 40 island of inversion extends down to Z = 20 , disfavoring a possible doubly magic character of the elusive <SUP>60</SUP>Ca.</P>