Search

Low-lying proton-emitting states of 16 F have been investigated through the sequential particle decay reactions 14 N( 3 He, n) 16 F(p) 15 O. Excitation energies were determined by measuring outgoing proton energies. Estimations of proton decay widths and spin limitations were made from proton spectra and angular correlation data which were obtained by detecting the protons in time coincidence with the associated neutrons at θ n = 0°. To date, the ground-state spin of 16 F has been considered to be J = 0; however, the present work suggests J = 1 to be preferable.

Yields of Lα X-rays from a light element matrix have been measured for elements with atomic number 52 ≤ Z ≤ 92, for incident proton energy of 2.61 MeV. The experimental results have been compared with the results of numerical calculations using L X-ray production cross section data in literature. It is shown that results of such calculations can be used for analytical application using monostandards in thick-target PIXE.

A self-supporting silicon-nitride target foil has been fabricated by a radio-frequency reactive sputtering method. Results of measurements with this target foil show that this method is useful for fabrication of a nitrogen target.