Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] ackf_v1_0.gz(3 Kbytes)|
|Manuscript Title: Program for calculating work functions from photoelectric data.|
|Authors: I.F. Kerr, C.H.B. Mee|
|Program title: WORK|
|Catalogue identifier: ACKF_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 7(1974)419|
|Programming language: Fortran.|
|Computer: ICL 1906S.|
|Operating system: FLAIR.|
|RAM: 3K words|
|Word size: 24|
|Keywords: Solid state physics, Work fraction, Photoelectric emission, Fowler plot, Surfaces, Method of bisection, Least squares, Error matrix.|
Nature of problem:
The work function of a metal may be obtained by fitting measurements of the photoelectric yield at various photon energies near the threshold to the theoretical Fowler curve. The program carries out this curve- fitting operation.
A similiar method of calculation has been described by Lea et al. The best fit is obtained by minimising the squares of the deviations between the experimental and theoretical ordinate values. The solution of the two normal equations resulting from this operation is by the method of bisection.
The execution time per curve fit is negligible (less than 1s). In practice, the number of curve fits is limited to the allowed number of lines output on the line printer (about 35 lines per fit).
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