Positron reemission from clean and LiF coated W(100): Effect of oxygen exposure

13th International Workshop on Slow Positron Beam Techniques and Applications

Sudarshan, K.^1,3 ; Samarin, S.N.^1 ; Wilkie, P.J.^1 ; Guagliardo, P.^1 ; Petrov, V.N.^1,2 ; Williams, J.F.^1

ARC Centre of Excellence for Antimatter and Matter Studies, School of Physics, University of Western Australia, Crawley, Perth WA 6009, Australia^1

St. Petersburg State Polytechnical University, Polytechnicheskaya 29, St-Petersburg 195251, Russia^2

Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India^3

关键词: Effect of oxygen;    Oxygen exposure;    Positron energy;    Re-emission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/505/1/012004/pdf
DOI  :  10.1088/1742-6596/505/1/012004

来源: IOP

【 摘 要 】

Positron reemission has been measured from clean and oxygen exposed W(100), as well as W(100) with LiF deposited on the surface at an incident positron energy of 600eV. The reemitted positron yield was found to be much lower from LiF deposited W(100) than from clean W(100). Oxygen exposure caused a drastic reduction in the reemission yield from W(100) but did not cause any major changes in the LiF deposited sample.