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Effective Mass of the Positron in Sodium

1966; American Institute of Physics; Volume: 149; Issue: 1 Linguagem: Inglês

10.1103/physrev.149.406

1536-6065

Chanchal K. Majumdar,

Advanced Chemical Physics Studies

The band effective mass of the positron in sodium is computed by the standard method of Wigner, Seitz, and Bardeen. The result is ${m}^{*}=1.06m$, where $m$ is the free-particle mass. Combining it with the results of the many-body calculations of the effective mass of a positron interacting with a Fermi sea of electrons, one can conclude that the theoretical value is much smaller than the experimentally observed effective mass.