Calculations of the 16O(e, e′ p N) cross sections to the ground state and first excited levels of the 14C and 14N nuclei are presented. The effects of nuclear fragmentation have been obtained in a self-consistent approach and are accounted for in the determination of the two-nucleon removal amplitudes. The Hubert space is partitioned in order to compute the contribution of both long- and short-range effects in a separate way. Both the two-proton and the proton-neutron emission cross sections have been computed within the same model for the nuclear structure as well as the same treatment of the reaction mechanism, with the aim of better comparing the differences between the two physical processes. The 38O(e,e′ pp) reaction is found to be sensitive to shortrange correlations, in agreement with previous results. The 16O(e,e′ pn) cross section to 1 + final states is dominated by the ΔA current and tensor correlations. For both reactions, the interplay between collective (long-range) effects and short-range and tensor correlations plays an important role. This suggests that the selectivity of (e,e′ pN) reactions to, the final state can be used to probe correlations also beyond short-range effects.
Effects of nuclear correlations on the 16O(e,e′pN) reactions to discrete final states / C. Barbieri, C. Giusti, F.D. Pacati, W.H. Dickhoff. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 70:1(2004), pp. 014606.1-014606.12.
Effects of nuclear correlations on the 16O(e,e′pN) reactions to discrete final states
C. Barbieri;
2004
Abstract
Calculations of the 16O(e, e′ p N) cross sections to the ground state and first excited levels of the 14C and 14N nuclei are presented. The effects of nuclear fragmentation have been obtained in a self-consistent approach and are accounted for in the determination of the two-nucleon removal amplitudes. The Hubert space is partitioned in order to compute the contribution of both long- and short-range effects in a separate way. Both the two-proton and the proton-neutron emission cross sections have been computed within the same model for the nuclear structure as well as the same treatment of the reaction mechanism, with the aim of better comparing the differences between the two physical processes. The 38O(e,e′ pp) reaction is found to be sensitive to shortrange correlations, in agreement with previous results. The 16O(e,e′ pn) cross section to 1 + final states is dominated by the ΔA current and tensor correlations. For both reactions, the interplay between collective (long-range) effects and short-range and tensor correlations plays an important role. This suggests that the selectivity of (e,e′ pN) reactions to, the final state can be used to probe correlations also beyond short-range effects.File | Dimensione | Formato | |
---|---|---|---|
PhysRevC_70_014606_2004.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Dimensione
175.86 kB
Formato
Adobe PDF
|
175.86 kB | Adobe PDF | Visualizza/Apri |
0402081.pdf
accesso aperto
Tipologia:
Pre-print (manoscritto inviato all'editore)
Dimensione
558.04 kB
Formato
Adobe PDF
|
558.04 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.