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A Study of the Transmutation of Nitrogen by Protons


Duncan, Donal Baker (1951) A Study of the Transmutation of Nitrogen by Protons. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/Y021-RA24.


An experimental investigation has been made of the cross section for the N14(pγ)O15 reaction using protons accelerated by an electrostatic generator. Excitation curves have been obtained from Be3N2 targets, nitrogen gas targets, and a thin target formed by proton bombardment of a copper foil in a nitrogen atmosphere. It has been found possible to describe the experimental cross section from .250 to 2.6 MeV by assuming the existence of nine resonances. The parameters appropriate for a theoretical description of the resonances are determined from the experimental data. The yields from the various resonances are extrapolated to the low energies corresponding to stellar temperatures. It has not been possible to make more than very uncertain assignment of such properties as the angular momentum and parity for the excited levels in O15 that are indicated by the cross section.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Physics and Mathematics)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Mathematics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Lauritsen, Charles Christian (advisor)
  • Fowler, William A. (co-advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1951
Record Number:CaltechTHESIS:08092017-155658346
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10376
Deposited By: Benjamin Perez
Deposited On:10 Aug 2017 14:29
Last Modified:27 Apr 2023 23:50

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