6 Matching Results

Search Results

Advanced search parameters have been applied.

Lectures on geometrical properties of nuclei

Description: Material concerning the geometrical properties of nuclei is drawn from a number of different sources. The leptodermous nature of nuclear density distributions and potential wells is used to draw together the various geometrical properties of these systems and to provide a unified means for their description. Extensive use is made of expansions of radial properties in terms of the surface diffuseness. A strong case is made for the use of convolution as a geometrical ansatz for generating diffuse surface distributions because of the number of simplifications that arise which are of practical importance. 7 figures. (auth)
Date: November 1, 1975
Creator: Myers, W.D.
Partner: UNT Libraries Government Documents Department

Measurement of the Kaon Form Factor

Description: The authors propose an experiment to measure elastic kaon scattering from electrons at a beam energy of 250 GeV. This measurement provides the first experimental value for the charge radius of the kaon. The anticipated error on the determination of the radius is 0.03 Fermi. The experiment can be performed by the present E216 spectrometer in the M1 beam line. A drift chamber system will be added to improve the spectrometer resolution and minor modifications of the trigger hodoscope and shower counter geometry will be required. The experimental design incorporates their experience in performing {pi}-e elastic scattering at 50 GeV/c at Serpukhov and at 100 GeV/c in E216 at Fermilab (data taking completed on October 1, 1975). The analysis of the E216 results is well underway and they anticipate that a definitive value for the pion radius will soon be obtained (anticipated error {+-} 0.03 F). All apparatus is designed with the goal of measuring a 1% absolute cross section. To cleanly identify elastic events and reject background, the angles and momenta of both the scattered K and e are measured. Proportional chambers and drift chambers upstream and downstream of the hydrogen target measure angles to high accuracy. Two 8-24-72 analysis magnets are used, followed by a set of six 0.5 x 1.5 m{sup 2} spark chambers, to determine momenta. A lead glass shower counter hodoscope provides electron shower identification. In the trigger there is only one veto counter used which is sensitive to target interactions. It helps to suppress non K-e background and its effect on K-e elastic events is small and well understood. A time request for 200 hours of testing and 600 hours for data taking is made in the proposal. Their continued interest in pion form factor measurements at energies much higher than 100 GeV is ...
Date: October 1, 1975
Creator: Dally, E.; May, C.; Hauptmann, J.; Stork, D.; U., /California; Ioan, I. et al.
Partner: UNT Libraries Government Documents Department

Analytic transport theory solutions for steady sources in pure absorbers

Description: The monoenergetic steady-state integral neutron transport equation is solved analytically for several simple source configurations for pure absorbers. Specifically, the scalar neutron flux, phi(r), is derived for configurations in cartesian geometry representing the point, infinite line, infinite plane, finite line, infinite ribbon, finite ribbon, infinite tube, and finite box sources. Some of these configurations (point, infinite line, and infinite ribbon sources) were investigated previously by Case, deHoffmann and Placzek and are reviewed here for completeness. The others are more complex and represent new analytic solutions against which multidimensional numerical transport calculational codes may be tested. (auth)
Date: October 1, 1975
Creator: Lee, C.E.
Partner: UNT Libraries Government Documents Department

Ring insertions as light sources

Description: Bending magnets can be inserted in the long straight sections of electron storage rings to produce synchrotron radiation. If the design is carefully proportioned, the bending magnets create only a small perturbation of the properties of the ring. The resulting spectra have favorable optical properties as sources for spectroscopy and diffraction studies. The characteristics of the source are discussed, and the geometrical requirements of the magnets are presented. (PMA)
Date: January 1, 1975
Creator: Green, G.K.
Partner: UNT Libraries Government Documents Department