Exploring the structure of 29Ne

Pairing enhancement in a two-neutron transfer process through the continuum

“…Direct transfer reactions have proven to be convenient tools to study light exotic nuclei, since the reaction mechanisms are simple enough to probe the structure of participating nuclei with sufficient accuracy. Twoneutron transfer reactions, in particular, enable a better comprehension of the halo phenomenon [1,2,3,4,5,6,7] in two-neutron halos by providing considerable information about the correlations between valence neutrons [8]. They have been especially important in trying to explain mass gaps at A = 5, 8 through dineutron captures on 4 He and 6 He.…”

“…Twoneutron transfer reactions, in particular, enable a better comprehension of the halo phenomenon [1,2,3,4,5,6,7] in two-neutron halos by providing considerable information about the correlations between valence neutrons [8]. They have been especially important in trying to explain mass gaps at A = 5, 8 through dineutron captures on 4 He and 6 He. In fact, two-neutron captures or transfers to form 6 He are also known to have a considerable effect on r-process seed nuclei production in the extremely neutron rich environment at low temperatures [9,10].…”

“…They have been especially important in trying to explain mass gaps at A = 5, 8 through dineutron captures on 4 He and 6 He. In fact, two-neutron captures or transfers to form 6 He are also known to have a considerable effect on r-process seed nuclei production in the extremely neutron rich environment at low temperatures [9,10].…”

“…Therefore, a detailed study of coupled channels and sequential transfer effects needs to be undertaken for weakly bound nuclei taking into thorough consideration the dynamical interplay of the continuum [8,14,15,18] through the intermediary nucleus and compare them with the bound state couplings (if any) to understand the reaction mechanisms properly. We try here such a case and study the effect of pairing through the photography of the ground state and the continuum of 5 He in a two-neutron transfer reaction for the formation of the simplest two-neutron halo nucleus 6 He. We consider scenarios where the 5 He intermediary nucleus is unbound (as is the natural case) and also bound hypothetically with the bound ground state at 1 MeV and 0.1 MeV to form two different cases for comparisons.…”

Exploring the halo character and dipole response in the dripline nucleus $^{31}$F

“…Consequently, the interest in these uniquely organized subatomic structures has piqued, gradually encompassing not only the lower mass weakly bound nuclei, but also those in the medium mass region. In particular, the 'island of inversion' [1,2] has garnered much attention due to the reduced shell gaps, leading to inversion and possible mixing of the pfand sd-shell neutron configurations in F, Ne, Na and Mg isotopes [3][4][5][6][7][8][9][10][11][12]. The mixing of the pf -and sd-shell energy levels also leads to possible formation of a halo in some of these isotopes, where the low l configuration (l = 0, 1) favors the extension of the tail of the wave function of the valence neutron(s) to diffuse into the classically forbidden region, giving the nucleus a larger matter radius [13,14].…”