UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Volumes from which calcium and phosphorus X-rays arise in electron probe emission microanalysis of bone: Monte Carlo simulation

Howell, PGT; Boyde, A; (2003) Volumes from which calcium and phosphorus X-rays arise in electron probe emission microanalysis of bone: Monte Carlo simulation. CALCIFIED TISSUE INT , 72 (6) 745 - 749. 10.1007/s00223-002-2010-9.

Full text not available from this repository.

Abstract

Monte Carlo simulations of trajectories for electrons with initial energy of 10 keV through 30 keV were used to map the 3D location of characteristic x-ray photon production for the elements C, P, and Ca until the electrons either escaped as backscattered electrons (BSE) or had insignificant energy. The x-ray production volumes for phosphorus slightly exceed those for calcium, but both greatly exceed the volume through which BSE travel prior to leaving the sample. The x-ray volumes are roughly hemispherical in shape, and the oblate spheroid from which BSE derive occupies only the upper third to half the volume of x-ray generation. Energy-dispersive x-ray emission microanalysis (EDX) may not be secure as a method for the quantitation of BSE images of bone in the scanning electron microscope (SEM). Ca:P elemental ratios from EDX analyses may also be imperfect.

Type:Article
Title:Volumes from which calcium and phosphorus X-rays arise in electron probe emission microanalysis of bone: Monte Carlo simulation
DOI:10.1007/s00223-002-2010-9
Keywords:Ca : P ratio, EDX, BSE SEM, bone, excitation volume, emission volume, microanalysis, MEAN ATOMIC-NUMBER, BACKSCATTERING, COEFFICIENT, MICROSCOPY, RADIATION
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Life Sciences > Biosciences (Division of)
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute

Archive Staff Only: edit this record