Efficiency calibration of low-energy electron detectors by means of β-ray emitters

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 438; no. 2; pp. 433 - 438
• Main Authors: Špalek, A., Dragoun, O., Ryšavý, M., Dragounová, N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11.12.1999
• Subjects: Beta spectra; Electron detector efficiency; formula omitted; 29-30.−h; Beta spectra; 241 Pu; 29.30.Dn; 23.40.−s; Electron detector efficiency; 63 Ni
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(99)00875-X

The relative efficiency of a channel electron multiplier for 2–9 keV electrons was determined using the β-spectra of vacuum evaporated 241 Pu and 63 Ni sources. The results agreed within ±0.8% (1 σ). Conversion electron measurements of 57 Co and 169 Yb supported the result. The electron scattering and energy losses within the sources were taken into account by means of Monte Carlo simulations of individual elastic and inelastic collisions. The detector was calibrated in the same geometry as it works inside the cylindrical mirror analyzer.