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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Structure and Dynamics of Nuclei XI

HK 53.3: Talk

Wednesday, March 13, 2024, 18:15–18:30, HBR 19: C 5b

Excited states in 56Ti, 58Ti populated in one proton knockout — •Wiktor Poklepa and Martha Reece for the HiCARI collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

The neutron-rich Ti isotopes lie within the interests of nuclear physicists for several reasons. One of the reasons studied in previous works is the region of validity of the new neutron magic numbers N=32,34. The other one is approaching the island of inversion around N=40 with the most exotic Ti isotopes. The E(2₁⁺) energies for even-even Ti isotopes have been measured up to N=40 and in contrast to Ca and Ar isotopes, there is no enhancement of E(2₁⁺) for ⁵⁶Ti. At the same time the B(E2) values for this set of isotopes have been established only up to N=34. The currently known trend in B(E2) values in Ti isotopes shows a staggering behaviour, but experimental uncertainties are too large to draw conclusions. Thus further investigation is needed. In this experiment, B(E2) values and lifetimes of states in ^56,58Ti were studied employing proton knockout reactions from ^57,59V at the RIBF facility in Japan. Secondary beams produced from ⁷⁰Zn at 345 MeV/u were transported through the BigRIPS spectrometer. Gamma rays emitted by the reaction products were detected by the HiCARI HPGe detector array. The reaction products were identified using the ZeroDegree spectrometer. In this talk, the first preliminary results on the spectroscopy and lifetime measurements for ^56,58Ti will be presented.

Keywords: neutron-rich Ti isotopes; HiCARI experiment; BigRIPS; lifetime measurements