Photoinduced two-proton knockout and ground-state correlations in nuclei
نویسنده
چکیده
A factorized and analytical form for the A(γ,pp) and A(e,epp) cross section is proposed. In the suggested scheme the two-proton knockout cross sections can be directly analyzed in terms of the ground-state correlation functions. Central, spin-spin and tensor correlations are considered. In the longitudinal channel, the (e,epp) cross section is predicted to exhibit a peculiar sensitivity to ground-state correlation effects. PACS : 24.10.-i, 24.10.Cn
منابع مشابه
- th / 9 61 00 06 v 1 3 O ct 1 99 6 Pairing correlations in N ∼ Z pf - shell nuclei
We perform Shell Model Monte Carlo calculations to study pair correlations in the ground states of N = Z nuclei with masses A = 48 − 60. We find that T = 1, J π = 0 + proton-neutron correlations play an important, and even dominant role, in the ground states of odd-odd N = Z nuclei, in agreement with experiment. By studying pairing in the ground states of 52−58 Fe, we observe that the isovector...
متن کاملTwo-Proton Decay Experiments at MSU
First evidence for direct two-proton radioactivity has been observed in the decay of the first excited state of Ne. The decay is in competition with the -decay back to the ground state of Ne and from the branching ratio the lifetime for the two-proton decay is estimated to be 0.9 ps. The proton-proton angular distribution is statistically not significant to observe any correlations. The first e...
متن کاملProton drip-line nuclei in Relativistic Hartree-Bogoliubov theory
Ground-state properties of spherical even-even nuclei 14 ≤ Z ≤ 28 and N = 18, 20, 22 are described in the framework of Relativistic Hartree Bogoliubov (RHB) theory. The model uses the NL3 effective interaction in the mean-field Lagrangian, and describes pairing correlations by the pairing part of the finite range Gogny interaction D1S. Binding energies, two-proton separation energies, and proto...
متن کاملMg * in the Splitting Of
The 28 Si(p,p ′ γ 0 X) 24 Mg reaction has been studied at the ITEP accelerator by the hadron-gamma coincidence method for a proton energy of 1 GeV. Two reaction products are detected: a 1368.6-keV γ-ray photon accompanying the transition of the 24 Mg * nucleus from the first excited state to the ground state and a proton p ′ whose momentum is measured in a magnetic spectrometer. The measured di...
متن کاملNucleon-Nucleon Correlations and Two-Nucleon Currents in Exclusive (e, e′NN) Reactions
It is well known that nuclei form a many-body system of interacting nucleons which exhibit strong correlations beyond the mean field or Hartree-Fock approximation. The strong short-range and tensor components of a realistic model for the nucleon-nucleon (NN) interaction induce corresponding two-body correlations. Many attempts have been made to explore the details of these correlations. Photoin...
متن کامل