Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of $N = 32$

Á. Koszorús , X.F. Yang , W.G. Jiang , S.J. Novario , S.W. Bai , J. Billowes , C.L. Binnersley , M.L. Bissell , T.E. Cocolios , B.S. Cooper , R.P. de Groote , A. Ekström , K.T. Flanagan , C. Forssén , S. Franchoo (1) , R.F. Garcia Ruiz , F.P. Gustafsson , G. Hagen , G.R. Jansen , A. Kanellakopoulos , M. Kortelainen , W. Nazarewicz , G. Neyens , T. Papenbrock , P.G. Reinhard , B.K. Sahoo , C.M. Ricketts , A.R. Vernon , S.G. Wilkins

1 IPNO - Institut de Physique Nucléaire d'Orsay

The charge radii of potassium isotopes up to $^{52}$K are measured, and show no sign of magicity at 32 neutrons as previously suggested in calcium. The observations are interpreted with coupled cluster and density functional theory calculations.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]; Physique Générale [physics.gen-ph]

Á. Koszorús, X.F. Yang, W.G. Jiang, S.J. Novario, S.W. Bai, et al.. Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of $N = 32$. Nature Phys., 2021, 17 (4), pp.439-443. ⟨10.1038/s41567-020-01136-5⟩. ⟨hal-03086792⟩