| 1. |
- Macchiavelli, A. O., et al.
(författare)
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"Piston" mechanism in a time-dependent two-level model
- 2021
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Ingår i: Physical Review C. - : American Physical Society (APS). - 2469-9985 .- 2469-9993. ; 104:6
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Tidskriftsartikel (refereegranskat)abstract
- We analyze a recent study of the one-proton knockout reaction on N-19 in the framework of a time-dependent two-level model. Focusing on the specific case of C-18, we quantify the validity of the so-called "piston" mechanism in terms of the timescales involved in the process, namely, the reaction time, the period of oscillation between the mixed states, and the lifetime of the excited unbound state.
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| 2. |
- Civitarese, O., et al.
(författare)
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Effects of resonant and continuum states on the neutrino-nucleus cross section
- 2008
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 78:6, s. 064308-
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Tidskriftsartikel (refereegranskat)abstract
- Estimates of the neutrino-nucleus cross section, for the charged-current process nu + Pb-208 -> e(-) + Bi-208*, are presented. The nuclear structure calculations were performed by considering bound, resonant, and continuum states in the single-particle basis used to construct correlated proton-particle neutron-hole configurations. The observed features of the spectrum of Bi-208 were reproduced, as accurately as possible, by diagonalizing a phenomenological multipole-multipole interaction. Calculations of the cross section, for values of q <= 200 MeV, were performed, and the dependence of the results on the choice of the residual proton-neutron interaction was investigated. It is found that the inclusion of resonant states in the calculation of the nuclear wave functions increases the neutrino-nucleus cross section and that the contribution of the continuum is negligible.
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