Binding energies and radii of α-cluster-type nuclei from calculations based on the strictly restricted dynamics model

Nuclear charge radii of neutron deficient titanium isotopes44Ti and45Ti

“…The increase is offset slightly because the rms radius is now defined with respect to the centre of mass of the cluster system. Such cluster calculations have been carried out for 44 Ti [14,15] and predict rms radii consistent with the present measurement. However, the accuracy of the calculations is limited and the uncertainties are large compared to the apparent discrepancy between the Ca and Ti (N = 22) isotone radii, which is at the level of 0.01 fm.…”

“…However, the accuracy of the calculations is limited and the uncertainties are large compared to the apparent discrepancy between the Ca and Ti (N = 22) isotone radii, which is at the level of 0.01 fm. The calculations by Krasta et al [14] have an rms deviation with experimental values of at least 0.07 fm (covering nine cluster nuclei below A = 44). For 44 Ti, they predict an rms radius of 3.64 fm, compared to our experimental value of 3.618(4) fm (table 1).…”

“…For the particular case of the 44 Ti isotope, other quantitative calculations of the charge radii must also be considered. A 40 Ca + α cluster structure has been predicted for the 44 Ti ground state [14,15]. The clustering of valence nucleons to form an α particle would act to increase the rms radius only if the cluster rms distance from the 40 Ca core centre were greater than the normal rms distance of the four valence nucleons (without the cluster correlations).…”

“…This paper is devoted to a precise study of the isotope shift of titanium isotopes ranging from 44 Ti to 50 Ti. The nucleus 44 Ti is of particular interest since, in contrast to other Ti isotopes, it is predicted to have a dominant 40 Ca + α cluster structure [12][13][14][15] in its ground state.…”