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Structure of 55Ti from relativistic one-neutron knockout

2009; Elsevier BV; Volume: 675; Issue: 1 Linguagem: Inglês

10.1016/j.physletb.2009.03.049

1873-2445

P. Maierbeck, R. Gernhäuser, R. Krücken, T. Kröll, H. Álvarez-Pol, F. Aksouh, T. Aumann, J. K. Behr, E. A. Benjamim, J. Benlliure, V. Bildstein, M. Böhmer, K. Boretzky, M. J. G. Borge, A. Brünle, A. Bürger, M. Caamaño, E. Casarejos, A. Chatillon, L.V. Chulkov, D. Cortina‐Gil, J. Enders, K. Eppinger, T. Faestermann, J. Friese, L. Fabbietti, M. Gascón, H. Geißel, J. Gerl, M. Górska, P.G. Hansen, B. Jonson, R. Kanungo, O. Kiselev, I. Kojouharov, A. Klimkiewicz, T. Kurtukian‐Nieto, N. Kurz, K.E. Larsson, T. Le Bleis, K. Mahata, L. Maier, T. Nilsson, C. Nociforo, G. Nyman, C. Pascual-Izarra, Á. Perea, D. Pérez, A. Prochazka, C. Rodríguez–Tajes, D. Rossi, H. Schaffner, G. Schrieder, S. Schwertel, H. Simon, B. Sitár, M. Stănoiu, K. Sümmerer, O. Tengblad, H. Weick, S. Winkler, B. A. Brown, Takaharu Otsuka, J. A. Tostevin, W. D. M. Rae,

Astronomical and nuclear sciences

Results are presented from a one-neutron knockout reaction at relativistic energies on 56Ti using the GSI FRS as a two-stage magnetic spectrometer and the Miniball array for gamma-ray detection. Inclusive and exclusive longitudinal momentum distributions and cross-sections were measured enabling the determination of the orbital angular momentum of the populated states. First-time observation of the 955(6) keV nu p3/2-hole state in 55Ti is reported. The measured data for the first time proves that the ground state of 55Ti is a 1/2- state, in agreement with shell-model calculations using the GXPF1A interaction that predict a sizable N=34 gap in 54Ca.