N=16 magicity revealed at the proton drip-line through the study of 35Ca - Archive ouverte HAL
Article Dans Une Revue Physical Review Letters Année : 2023

N=16 magicity revealed at the proton drip-line through the study of 35Ca

A Poves
  • Fonction : Auteur
D Suzuki
  • Fonction : Auteur
B.A Brown
  • Fonction : Auteur
N Kitamura
  • Fonction : Auteur
T.Y Saito
  • Fonction : Auteur

Résumé

The last proton bound calcium isotope $^{35}$Ca has been studied for the first time, using the $^{37}$Ca($p, t$)$^{35}$Ca two neutron transfer reaction. The radioactive $^{37}$Ca nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid hydrogen target CRYPTA, to produce tritons $t$ that were detected in the MUST2 detector array, in coincidence with the heavy residues Ca or Ar. The atomic mass of $^{35}$Ca and the energy of its first 3/2$^+$ state are reported. A large $N=16$ gap of 4.61(11) MeV is deduced from the mass measurement, which together with other measured properties, makes $^{36}$Ca a doubly-magic nucleus. The $N = 16$ shell gaps in $^{36}$Ca and $^{24}$O are of similar amplitude, at both edges of the valley of stability. This feature is discussed in terms of nuclear forces involved, within state-of-the-art shell model calculations. Even though the global agreement with data is quite convincing, the calculations underestimate the size of the $N = 16$ gap in 36Ca by 840(110) keV.

Dates et versions

hal-04020108 , version 1 (08-03-2023)

Identifiants

Citer

L Lalanne, O Sorlin, A Poves, M Assié, F Hammache, et al.. N=16 magicity revealed at the proton drip-line through the study of 35Ca. Physical Review Letters, 2023, 131 (9), pp.092501. ⟨10.1103/PhysRevLett.131.092501⟩. ⟨hal-04020108⟩
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