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Absolute Transition Probabilities for Ni I and the Solar Nickel Abundance


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.


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 ANi = 6.29 ± 0.2 based on the results of the transition probability measurements. A new transition (z5 Go5 - e3G5, λ4633.031) has been observed in the Ni I spectrum.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
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)
Defense Date:28 May 1974
Additional Information:Page 98 missing from original source material.
Record Number:CaltechTHESIS:07072021-181528051
Persistent URL:
Related URLs:
URLURL TypeDescription adapted for Appendix A. adapted for Appendix B. adapted for Appendix C.
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14296
Deposited By: Benjamin Perez
Deposited On:09 Jul 2021 00:40
Last Modified:09 Jul 2021 00:41

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