Extremely large matter radii in ${}^{49-51}$Ca isotopes and the $0^{+}$ breathing mode states of ${}^{48}$Ca

Abstract

Through inelastic scattering cross section measurements for ${}^{42-51}$Ca on a carbon target at 280 MeV/nucleon recently, Tanaka {\it et al.} [ arXiv:1911.05262 [nucl-ex]], in a very significant experiment, have demonstrated large swelling of doubly magic ${}^{48}$Ca core in calcium isotopes beyond N=28. The matter radii observed in these experiments, are surprisingly much larger than the corresponding, already amazingly large charge radii of the same calcium isotopes, by Garcia {\it et al.} [Nat. Phys. 12 (2016) 594]. Here we propose a novel solution, wherein the breathing mode states $0^{+}$ of ${}^{48}$Ca, provide a global and consistent solution of this matter radii conundrum.

5 pages