N15(p, d)N

Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17−22N

“…For this comparison an F value of 6.11 obtained with the relevant degrees of freedom, 5 and 3, shows that the data exhibit a dip in the proton radius of 21 N with p-value of 93% probability. The decrease in the central value of the proton radius for 21 N compared to 20,22 N is found even with lower beam counts, providing support (3) 3.08 (12) that this feature is not arising from statistical fluctuations. The statistical contribution to the uncertainty of the proton radii for 20,21 N is ∼ 0.01 fm, and for 22 N is ∼ 0.03 fm.…”

Estimated interaction and proton removal cross sections for 60 – 710 A MeV 15O and 17Ne nuclei on 9Be and 12C targets

“…This contribution is estimated in the core+proton model of 15 O (see [2]), taking into account excited states of the 14 N core. The p 1/2 , p 3/2 -wave proton removal from the 15 O ground state (1/2 − ) leads to the 14 N bound states E x = 0.0 MeV (J π = 1 + , T = 0) (with the dominant p 1/2 , p 1/2 configuration), E x = 3.948 MeV (J π = 1 + , T = 0) (p 1/2 , p 1/2 and p 3/2 , p 3/2 ), and E x = 7.029 MeV (J π = 2 + , T = 0) (p 3/2 , p 1/2 ) (for details of the single particle configurations of these states see [12]). The 15 O production with the regard for the proton removal from the 15 O core is shown in Fig.…”

Phenomenological analysis ofB(E2)transition strengths in neutron-rich carbon isotopes

“…Actually, its wave function can be written in the form of Eq. (3), with α ≈ β ≈ 0.7 [17,19,20]. In this particular case, however, the neutrons do not contribute to the B(E2) since their configuration is a 2p2h excitation.…”