Polarization degrees of freedom in photoinduced two-nucleon knockout from finite nuclei

Abstract

The polarization degrees of freedom in photoinduced two-nucleon knockout from finite nuclei are studied. It is pointed out that they open good perspectives to study the dynamics of dinucleons in the medium in detail. The ($\gamma ,pp$) and ($\gamma ,pn$) angular cross sections, photon asymmetries and outgoing nucleon polarizations are calculated for the target nuclei ${}^{16}$O and ${}^{12}$C and photonenergies ranging from 100 up to 500 MeV. It is investigated to which degree the two-nucleon emission reaction is dominated by photoabsorption on ${}^3{S}_1(T=0)$ proton-neutron and ${}^1{S}_0(T=1)$ proton-proton pairs in the nuclear medium. The calculations demonstrate that dominance of $S$ wave photoabsorption in the ($\gamma ,pn$) channel does not necessarily imply that the reaction mechanism is similar to what is observed in deuteron photodisintegration.

27 pages, REVTeX 3.0 with epsf.sty, 11 figures in EPS format

References in corpus (2)

• Electroinduced two-nucleon knockout and correlations in nuclei
• Systematic study of Coulomb distortion effects in exclusive (e,e'p) reactions

Cited by in corpus (8)

• The 2p-2h electromagnetic response in the quasielastic peak and beyond
• Counting the number of correlated pairs in a nucleus
• Photon-induced two-nucleon knockout reactions to discrete final states
• NN final-state interaction in two-nucleon knockout from ${}^{16}O$
• Photo-emission of two protons from nuclei
• Polarization observables in electronuclear two-nucleon knockout
• Dependence of the ${}^{12}$C($\vec{\gamma }$,pd) reaction on photon linear polarisation
• Proton recoil polarization in exclusive (e,e'pp) reactions