A study of the Transmutation of Nitrogen by Protons

Physics

Duncan, Donal Baker ; Lauritsen, Charles Christian (advisor)

University:California Institute of Technology

Department:Physics, Mathematics and Astronomy

关键词: Physics;   

Others  :  https://thesis.library.caltech.edu/10376/2/Duncan_db_1951.pdf

美国|英语

来源: Caltech THESIS

【 摘 要 】

An experimental investigation has been made of thecross section for the N¹⁴(pγ)O¹⁵ reaction using protonsaccelerated by an electrostatic generator. Excitationcurves have been obtained from Be₃N₂ targets, nitrogen gastargets, and a thin target formed by proton bombardment ofa copper foil in a nitrogen atmosphere. It has been foundpossible 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 ofthe resonances are determined from the experimental data.The yields from the various resonances are extrapolated tothe low energies corresponding to stellar temperatures. Ithas not been possible to make more than very uncertain assignmentof such properties as the angular momentum andparity for the excited levels in O¹⁵ that are indicated by thecross section.