Absolute Transition Probabilities for Ni I and the Solar Nickel Abundance

Citation

Lennard, William Norman (1974) Absolute Transition Probabilities for Ni I and the Solar Nickel Abundance. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/xc68-b259. https://resolver.caltech.edu/CaltechTHESIS:07072021-181528051

Abstract

Absolute transition probabilities have been measured for 97 lines from 11 levels in Ni I using the lifetime and branching ratio techniques. Relative transition probabilities have been determined for 6 lines out of 2 levels whose lifetimes have been measured elsewhere. We have measured equivalent widths from the Kitt Peak Preliminary Solar Atlas for 48 of the lines for which absolute transition probabilities have been measured. An empirical solar curve of growth has been constructed for Ni I to test the consistency of the transition probability and equivalent width measures. The solar data have been used to calculate a value for the photospheric Ni abundance A_Ni = 6.29 ± 0.2 based on the results of the transition probability measurements. A new transition (z⁵ G^o₅ - e³G₅, λ4633.031) has been observed in the Ni I spectrum.

Thesis Files