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An investigation of the compound nuclei 7Li and 7Be


Spiger, Robert John (1967) An investigation of the compound nuclei 7Li and 7Be. Dissertation (Ph.D.), California Institute of Technology.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The differential elastic scattering cross section has been measured for the scattermg of [3He] from [4He] and the scattering of [4He] from tritium. Incident particle energies of 5 to 18 MeV and 4 to 18 MeV, respectively, were used. Gas targets were used and solid state silicon detectors were employed to detect the scattered particles. Data were also obtained for the reactions [...], [...], [...] and [...]. Levels are seen at 4.65, 6.64, 7.47 and 9.7 MeV in [7Li] and at 4.57, 6.73, 7.21 and 9.3 MeV in [7Be]. A phase shift analysis suggests assignments of [...] and [...] for the two lower levels in [7Li], confirms the [...] assignment of the 7.47 level and suggests a [...] assignment for the new level at 9.7 MeV. Similarly in [7Be], the assignment of [...] and [...] for the lower two levels is reconfirmed and an assignment of [...] is suggested for the new level at 9.3 MeV. The reduced widths for [alpha] and nucleon emission were determined by fitting the phase shifts near each level with a single and/or double level formula from the R-matrix formalism of Lane and Thomas (1958). The results of the analysis are discussed and compared with predictions of some recent nuclear model calculations.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Tombrello, Thomas A.
Thesis Committee:
  • Unknown, Unknown
Defense Date:27 October 1966
Record Number:CaltechETD:etd-10042002-143530
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3898
Deposited By: Imported from ETD-db
Deposited On:07 Oct 2002
Last Modified:26 Dec 2012 03:03

Thesis Files

PDF (Spiger_RJ_1967.pdf) - Final Version
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