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Evaluation of positron annihilation in Beryllium
Author(s) -
Oriade J. O.
Publication year - 1982
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560220107
Subject(s) - positron annihilation , annihilation , brillouin zone , beryllium , physics , positron , nuclear physics , photon , momentum (technical analysis) , angular momentum , quantum mechanics , finance , economics , electron
A band theoretical calculation of angular distribution of annihilation photons ( ADAP ) and the positron lifetime, up to and including higher momentum components is reported. The results obtained using biquadratic quasianalytic integration schemes for all Brillouin zone integrals, compare favorably with existing experimental data. There are, however, significant structures in the ADAP curve obtained than in the experimental curves.