Shell structure of new magic nuclei: Systematics of features

Correlations of nuclear charge radii with other nuclear observables

“…In conclusion of this section let us emphasize that due to some reasons the cases of 30 Si ( 30 S) are very intriguing: (i) one sees some inconsistences among the experimental observables for shell closures; (ii) a disagreement exists among the predictions of different theoretical models (compare, e.g. [29,30,40,42]; (iii) the experimentally correlations in this work contradict the empirical predictions of [1,2]. At the moment a consistent description of the properties of both nuclei remains a challenge for theory with a lot more input required from experiment.…”

“…6,8 He [22,23], 11 Be [24], 11 Li [25]; the predictions of proton halos [26] and the cluster-like structures in several Ne [26,27] and Mg isotopes [28]. Structural changes in exotic nuclei can lead to a quenching or even complete disappearance of shell closures, whereas new magic numbers can emerge as shown in many theoretical [21,[29][30][31][32][33], experimental [34][35][36] and empirical [1,2] studies. Usually, rapid nuclear structure changes appear in localized regions of the nuclear chart.…”

“…The only full isotonic radii curve crossing the proton number Z = 14 is that for N = 16 (see figures 3 and 4(a)). An additional motivation for considering this case is the recent work of Boboshin et al [1,2]. Based on the broad systematic of several nuclear observables-E 1 (2 + ) and quadrupole deformation β 2 (occasionally R 4/2 is included)-over the whole nuclide chart, these authors formulated an empirical j-j coupling rule for new double magic nuclei applicable to various single particle subshells.…”

“…shell closures and changes in deformation. Recently, remarkable correlations among different nuclear observables have been recognized predominantly in the intermediate and heavy mass regions that provide a new perspective in the study of structural evolution and can be a guide for future measurements [1][2][3]. The correlations obtained empirically are a challenge for nuclear theory: the predictive power of nuclear models for the nuclear mass regions investigated can be tested by trying to fit these parameter sets by different nuclear models.…”

“…According to the systematics of [2] and the rule of [31] for new magic numbers, 14 O (Z, N = 8,6)-the mirror nucleus of 14 C-should also be identified as double magic. Although we have only partial data on R for the N = 6 isotones (figure 9(c)), the trend toward minimum in the direction of Z = 8 is doubtless.…”