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Positron annihilation spectroscopy techniques applied to the study of an HPGe detector.
(São Sebastião, 2012-09-02)
Doppler Broadening Spectroscopy of the large Ge crystal of an HPGe detector was
perforrned using positrons from pair production of 6.13 MeV ϒ-rays from the 19F(p,αϒ) 16O reaction. Two HPGe detectors facing opposite sides ...
Statistical analysis of the Doppler broadening coincidence spectrum of electron-positron annihilation radiation in silicon
(ELSEVIER SCIENCE BV, 2009)
We report a statistical analysis of Doppler broadening coincidence data of electron-positron annihilation radiation in silicon using a (22)Na source. The Doppler broadening coincidence spectrum was fit using a model function ...
Multimode Vibrational Couplings in Resonant Positron Annihilation
(AMER PHYSICAL SOC, 2011)
The mechanisms for multimode vibrational couplings in resonant positron annihilation are not well understood. We show that these resonances can arise from positron-induced distortions of the potential energy surface (target ...
Oxygen related defects and vacancy clusters identified in sputtering grown UOx thin films by positron annihilation techniques
(Elsevier, 2021-08)
We experimentally studied the formation of vacancy clusters and oxygen related defects in uranium oxide (UOx) thin films (<70 nm) changing the stoichiometry in the x = 2.2?3.5 range. Films were deposited on Si(0 0 1) by ...
Vacancies and vacancy-oxygen complexes in silicon: Positron annihilation with core electrons
(The American Physical SocietyGrupo Estado SólidoEstados Unidos, 2017)
Impurity migration and effects on vacancy formation enthalpy in polycrystalline depleted uranium
(Elsevier Science, 2015-11)
We have used Doppler-broadening of the positron-electron annihilation radiation technique and VASP calculations to verify the previously reported vacancy formation enthalpy Hvf in polycrystalline depleted uranium. ...