[en] It is proposed to extract, independently of any nuclear model, the ⁴⁰Ca matter density from an analysis of the elastic scattering of ¹⁶⁶ MeV alpha particles. The scattering is described using an optical potential whose real part is evaluated by folding the matter density with a nucleon-alpha interaction. Following the procedure proposed by Sick (Nucl. Phys. A; 218: 509 (1974)) and Phys. Lett.; 44B; 62 (1975)) for the analysis of electron scattering data, the density is represented by a sum of gaussians whose amplitudes are deduced in fitting, via a chi² minimization, the experimental cross section data. This method determines the envelope of densities for different parameters of gaussians: width, spacing. The envelope of the moments of these densities are presented and the root-mean-square radius is extracted. It is concluded that only the nuclear surface is well studied by the alpha particle scattering. (author)

[en] A nearly model-independent matter density is derived from 1 GeV proton elastic scattering on ⁴⁰Ca using the Sick method. The different moments of these densities are calculated with their corresponding uncertainties

[en] A linear density dependent effective nucleon-nucleon interaction is used in a folding model to analyze 166 MeV α-particle elastic scattering data from ⁴⁰Ca. A phenomenological imaginary potential is added to the real potential generated by the model. The density dependence used is insufficient to fit the experimental angular distribution quantitatively. The nature of the change in the optical potential required to achieve better results is pointed out

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[en] The deep inelastic electron scattering from carbon up to and including the tained by means of a Rosenbluth-type analysis of the data in the momentum transfer interval 200 MeV/c < abs(q) < 550 MeV/c. A comparison with theoretical calculations which extend over the quasi-elastic and Δ peak regions is presented. A reduction of the differences between our data and theory seems obtainable through the introduction of meson exchange currents, resonant and nonresonant meson production and the use of the shell model. Our experimental Coulomb sum rule estimates at higher abs(q) agree with independent-particle model predictions

[en] Using bremsstrahlung produced with 6.6 and 9.7 MeV beams, nuclear resonance fluorescence measurements were made on targets of ^206207208Pb and ²⁰⁹Bi. Ground state transition widths for previously unknown energy levels with widths greater than aprox.1 eV were obtained. An interpretation of several of these levels in terms of particle--core weak-coupling model is suggested

[en] Resonant photon scattering from /sup 206,207,208/Pb and ²⁰⁹Bi has been measured from 4 MeV to the neutron thresholds using enriched targets, Ge(Li) detectors and bremsstrahlung beams with end-point energies of 7.0, 7.5, 7.6, 8.0, 8.5, and 10.4 MeV. Energies and values of gGAMMA₀²/GAMMA were obtained for many levels not observed in previous photon experiments. Spins of levels in ²⁰⁶Pb and ²⁰⁸Pb were determined from the angular distributions, and ground-state branching ratios were obtained from self-absorption measurements for seven transitions in ²⁰⁸Pb. The results are compared with earlier spectroscopic studies and with lower resolution average cross-section measurements. The spectra of ²⁰⁷Pb and ²⁰⁹Bi are discussed in terms of the excitations of the ²⁰⁸Pb core

[en] Resonant photon scattering from ⁵⁶Fe has been measured from 5 to 10 MeV using Ge(Li) detectors and bremsstrahlung beams with end-point energies of 7.6 and 10.3 MeV. Energies and values of gGAMMA₀²/GAMMA were obtained for more than 40 levels, most of which have not been observed in previous photon experiments. Spins of 13 levels were determined from angular distribution measurements. In complementary lower-resolution (ΔEapprox.100 keV) tagged photon measurements, average elastic and inelastic (to the first excited state) photon scattering cross sections were measured from 5.8 to 11.5 MeV (i.e., to above the neutron threshold). The combination of these measurements provides the most detailed account of bound-state dipole strength available in this mass region

[en] Nuclear resonance fluorescence from energy levels in /sup 27/Al lying between 2 and 10 MeV excitation energy has been measured with bremsstrahlung beams of end-point energies of 7.66 and 10.37 MeV. Values of gΓ₀ and gΓ₀Γ/sub γ//Γ for 39 levels below 10 MeV were obtained from scattering cross section and self-absorption measurements. The measurements give an upper bound of total B(M1up-arrow) below 7.7 MeV excitation which is about 25% less than the predictions of a large-scale shell model calculation based on the free-nucleon M1 operator. The same shell model wave functions combined with an effective M1 operator based on moments and transitions between low-lying states is in good agreement with the present experimental results

[en] A bremsstrahlung photon beam from electrons with end-point energies of 7.66 and 10.37 MeV was used for photoexciting levels in ²³Na. Values of gGAMMA₀²/GAMMA and gGAMMA₀ of 22 levels below 10 MeV were obtained using scattering and self-absorption measurements. The values for 7 levels are reported for the first time. The temperature variation of the scattering cross section was measured at T = 300 K and T = 78 K to study in some detail the effective temperature T/sub e/ of metallic ²³Na. The results of the total B(M1up-arrow) strength of T = 1/2 levels below 9 MeV were found to be in excellent agreement with the large-scale shell-model calculations