Structure of 55Ti from relativistic one-neutron knockout

Phys. Lett. B

675
22
(2009)
P. Maierbeck, R. Gernhäuser, R. Krucken, T. Kroll, H. Alvarez-Pol, F. Aksouh, T. Aumann, K. Behr, E.A. Benjamim, J. Benlliure, V. Bildstein, M. Bohmer, K. Boretzky, M.J.G. Borge, A. Brunle, A. Burger, M. Caamano, E. Casarejos, A. Chatillon, L.V. Chulkov, D. Cortina-Gil, J. Enders, K. Eppinger, T. Faestermann, J. Friese, L. Fabbietti, M. Gascon, H. Geissel, J. Gerl, M. Gorska, P.G. Hansen, B. Jonson, R. Kanungo, O. Kiselev, I. Kojouharov, A. Klimkiewicz, T. Kurtukian, N. Kurz, K. Larsson, T. Le Bleis, K. Mahata, L. Maier, T. Nilsson, C. Nociforo, G. Nyman, C. Pascual-Izarra, A. Perea, D. Perez, A. Prochazka, C. Rodriguez-Tajes, D. Rossi, H. Schaffner, G. Schrieder, S. Schwertel, H. Simon, B. Sitar, M. Stanoiu, K. Summerer, O. Tengblad, H. Weick, S. Winkler, B.A. Brown, T. Otsuka, J. Tostevin, W.D.M. Rae

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 
𝜈
𝑝
3
/
2
−
1
-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.
 

DOI
10.1016/j.physletb.2009.03.049
Published on
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