Generalized momentum distribution in finite nuclei

The generalized momentum distribution eta((p) over right arrow, (Q) over ri ght arrow) of finite nuclei is studied. Tractable analytical expressions an derived using a harmonic oscillator basis and numerical results are presen ted for the closed-shell nuclei O-16 and Ca-40 in the case that (p) over ri ght arrow is parallel to (Q) over right arrow. Our results are compared wit h those for an infinite Fermi gas of appropriate wave number and with those for a model nuclear matter derived via microscopic calculations including dynamical correlations. The method is expected to reproduce the main featur es of the quantity eta((p) over right arrow, (Q) over right arrow) stemming from finite nuclear size and Fermi statistics, being reliable at certain r egions of the momenta p and Q. (C) 2000 Elsevier Science B.V. All rights re served.