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Some remarks on positron/positronium diffusion models

100%

Świątkowski W.

2003

tom Vol. 48, nr 3

141-144

Positrons thermalized near the sample boundary (as well as Ps atoms formed in the sample) can reach the boundary as a result of diffusive movement. Observations of such effects as positron reemission or positron surface trapping as well as positronium emission allow one to calculate respective diffusion lengths. From the presented analysis it follows that some models used in such calculations give quite wrong results.

Positrons at Metal Boundary

100%

Świątkowski W. , Institute of Experimental Physics W. U.

tom 1

Current knowledge of positron-metal boundary interaction is reviewed. The review interlinks such phenomena as positron trapping at surface, escape of positrons from metals, directional action of metal-metal contact on diffusive movement of positrons and interaction of slow positron beam with surfaces.

Doświadczenie Francka i Hertza : 85 lat później

100%

Świątkowski W.

1998

tom T. 49, z. 4

221-225

In many books, where the known Franck and Hertz experiment is presented, one can find numerous mistakes. This problem is discussed using some drastic examples.