The relativistic spin-orbit force near the neutron-drip line

Nuclear surface properties in relativistic effective field theory

“…In agreement with Ref. [29] we have found that while V FW so (z) qualitatively reproduces the behaviour of V so (z), it strongly underestimates the quantitative depth of the fully relativistic spin-orbit strength (by ∼ 20% for M * ∞ /M = 0.6 and by ∼ 15% for M * ∞ /M = 0.7).…”

“…Another important quantity in the study of the nuclear surface structure is the spin-orbit interaction. By elimination of the lower spinor in terms of the upper spinor, one obtains a Schrödinger-type equation with a term V so (z) that has the structure of the single-particle spin-orbit potential for the non-relativistic case [27,29]. In our present model the orbital part of the spin-orbit potential reads as…”

“…Although previous works [23,24,25,26,27,28,29] have thoroughly investigated the properties of the nuclear surface in the standard non-linear σ −ω model, for which κ 3 and κ 4 are the only non-linearities in (2.1), here we wish to enlarge this study by including the additional non-linear and tensor couplings considered in Refs. [5,7,9].…”

Interactions effectives, théories de champ moyen, masses et rayons nucléaires

“…Les paramétrisations « standards » sont trop simplistes et une (W 0 ) voire deux (W 1 et W 2 ) intensités sont insuffisantes pour obtenir une bonne description de ces écarts en énergie. Ce problème est particulièrement crucial lorsque l'on considère l'évolution du champ HF spin-orbite le long d'une longue série isotopique : les théories relativistes (RHB incluant les corrélations d'appariement) prévoient, indépendamment de la paramétrisation utilisée, une diminution de ce champ [193,251,256,257] liée à l'augmentation de la diffusivité de surface [258] :…”

A simple coordinate space approach to three-body problems — Examples: Halo nucleus and double-λ hypernucleus

“…We have neglected the spin-orbit force because the recent study by Von Eiff [7] suggested a weaker spin-orbit interaction and less pronounced shell effects in neutron rich nuclei.…”