CaltechTHESIS
  A Caltech Library Service

Magnetic analysis of reactions leading to excited states in Li^6 and B^(11)

Citation

Groce, David Eiben (1963) Magnetic analysis of reactions leading to excited states in Li^6 and B^(11). Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:03022012-092419097

Abstract

A double-focusing magnetic spectrometer of 24-inch radius has been installed at the California Institute of Technology for use with the ONR Tandem Van de Graaff accelerator. The design, alignment, and testing of this instrument is described, and the performance is compared with the theoretical design predictions. A Be^9 (p,α)Li^(6*) reaction was investigated with this spectrometer. Excited states in Li^6 were seen at 2.19-, 3.57-, 4.50-, and 5.36-Me V, confirming previous work. Intense alpha particle background from the breakup of Li^(6*) Be^8, and Be^(9*) limit the information that can be obtained from the alpha particle spectrum. The Be^9(He^3 ,p)B^(11*) and B^(10) (d,p)B^(11*) reactions were used to investigate the excited states in B^(11). All known states between 8.9- and 15. 0-Me V excitation were observed except for states at 11.0- and 14.0-MeV excitation. In addition, two new states were found at 11.27- and 12.57-MeV excitation. It is believed that the 11.27-MeV state has isotopic spin T = 1/2 and that the 12.57-MeV state has isotopic spin T = 3/2.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics ; 24-inch Magnetic Spectrometer, Tandem Van de Graaff Accelerator
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Whaling, Ward
Thesis Committee:
  • Whaling, Ward (chair)
  • Lauritsen, Thomas
Defense Date:1 January 1963
Author Email:groce (AT) mac.com
Record Number:CaltechTHESIS:03022012-092419097
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:03022012-092419097
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6843
Collection:CaltechTHESIS
Deposited By: John Wade
Deposited On:02 Mar 2012 17:54
Last Modified:10 Feb 2014 19:14

Thesis Files

[img]
Preview
PDF - Final Version
See Usage Policy.

67Mb

Repository Staff Only: item control page