نتایج جستجو برای: shell sections
تعداد نتایج: 143387 فیلتر نتایج به سال:
In this paper we use the Schwinger multichannel method ~SMC! to calculate several types of cross sections related to the elastic electron scattering by NO. We show through the NO system that the elastic scattering of an electron by an open shell molecule is a much richer process than the corresponding scattering by closed shell targets. We present cross sections for unpolarized electron scatter...
saluk mount is selected for devonian biostratigraphy. this area located at southwest of bojnurd. in this study three sections are selected and two sections, chahar-borj and tabar sections with a thickness of 650 m, which consist mainly of calcareous sediments was studied in detailed but third section, qelli section, with a thickness of about 450m which consist mainly of sandstone and evaporates...
Production cross sections and excitation functions of neutron deficient isotopes of U, Pa and Th have been measured in the reaction of 22 N e+ 208 P b. The comparison of experimental production cross sections of uranium isotopes with the neutron number 126 ≤ N ≤ 134 to the values calculated using statistical model of nuclear deexcitation has been carried out. There is shown, that none of the co...
In atomic nuclei, ordered and chaotic states generally coexist. In this paper the transition from ordered to chaotic states will be discussed in the framework of roto–vibrational and shell models. In particular for 160Gd, in the roto–vibrational model, the Poincarè sections clearly show the transition from order to chaos for different values of rotational frequency. Furthermore, the spectral st...
While fits to 90% of all ever measured K-shell ionization cross sections by protons are on the average within 10% of the ECPSSR [W. Brandt, G. Lapicki, Phys. Rev. A 23 (1981) 1717], this theory systematically overestimates the remaining 10% of all data (comprised mainly of the measurements on heavy target elements) in the slow collision regime of proton velocities less than 0.1 of the orbital v...
Neutrino reaction cross-sections, (ν µ , µ −), (ν e , e −), µ-capture and photoab-sorption rates on 12 C are computed within a large-basis shell-model framework , which included excitations up to 4¯ hω. When ground-state correlations are included with an open p-shell the predictions of the calculations are in reasonable agreement with most of the experimental results for these reactions. Woods-...
We assess the sensitivity of the intermediate energy, direct two-nucleon knockout reaction mechanism to details of the correlated motions of the two removed nucleons as might be revealed by measurements of partial cross sections to different final states of the mass A−2 reaction residues. Comparisons of new reaction calculations with recent data for exotic nuclei in the sd-shell suggest that th...
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