Final state effects in inclusive quasielastic electron scattering from nuclei: Clues from quantum fluids
The impulse approximation (IA) predicts that momentum distributions, n/sub k/, in many-body systems should be measurable by inclusive quasielastic scattering at high energy and momentum (w,Q) transfer. The observations that the cross section appears to satisfy ''Y-scaling'' (i.e., is a function not of both w and Q of a single variable, Y) is usually taken as a signature of the IA. In nuclear physics, inelastic electron scattering at GeV energies should reveal the high momentum components of the nuclear wave function. In quantum fluids, neutron scattering at hundreds of MeV energies should measure the Bose condensate in superfluid /sup 4/He and the Fermi surface discontinuity and depletion of the Fermi sea in /sup 3/He. In molecular and condensed matter systems, X-ray Compton scattering at keV energies reveals electronic n/sub k/. Such experiments test many-body wave functions calculated by methods such as Green Function and Path Integral Monte Carlo, and Fermi Hypernetted Chain. However, an outstanding issue has been the corrections to the IA due to the scattering of the recoiling particle from neighboring particles, which are termed ''final state effects'' (FSE). The FSE should be especially important in nuclei and quantum fluids where the potentials have steeply repulsive cores. While there have been a variety of theories proposed for FSE, until now none has been adequately tested by experiment. Recently, the ''hard core perturbation theory'' (HCPT) for FSE in quantum fluids by Silver has been successfully compared to new neutron scattering measurements on /sup 4/He by P. E. Sokol and colleagues. In this paper, we shall discuss the lessons of this success for the extraction of n/sub k/ in nuclei by inclusive ''quasielastic electron-nucleus scattering'' (QENS). 19 refs., 12 figs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6838751
- Report Number(s):
- LA-UR-88-2507; CONF-8806144-2; ON: DE88014403; TRN: 88-031472
- Resource Relation:
- Conference: 5. international conference on nuclear reaction mechanisms, Villa Monastero, Italy, 13 Jun 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIUM 4 TARGET
NEUTRON REACTIONS
NUCLEI
ELECTRON REACTIONS
CROSS SECTIONS
GREEN FUNCTION
MOMENTUM TRANSFER
QUANTUM FLUIDS
QUASI-ELASTIC SCATTERING
WAVE FUNCTIONS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
FLUIDS
FUNCTIONS
HADRON REACTIONS
LEPTON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
QUASI-FREE REACTIONS
SCATTERING
TARGETS
653003* - Nuclear Theory- Nuclear Reactions & Scattering