Simulations of photon-assisted tunneling using the Fokker–Planck equation to model the scattering of electrons within the emitting metal tip

Hagmann, Mark J.; Mousa, Marwan S.; Brugat, M.

doi:10.1016/s0304-3991(01)00106-1

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2007

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“…This model was expanded to allow the prediction of the detection efficiency of this system for β − particle emitters of varying energy. The energy spectra of the β − particle emitters were computed from the Fermi distribution [12,[16][17][18]. The relationship between nanoparticle size and the path length that the β − particle needs to travel before encountering a nanoparticle can be determined by a modified mean free path equation [12].…”

Section: Theoretical Modelmentioning

confidence: 99%

Aqueous polystyrene–fluor nanosuspensions for quantifying α and β⁻radiation

Zhu¹,

Jay²

2007

Nanotechnology

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Fluor-containing nanoparticle suspensions prepared from styrene-in-water microemulsions were used to quantify 14C in various sample matrices by aqueous liquid scintillation counting. These suspensions exhibited greater quench resistance than a conventional organic cocktail and were very efficient at detecting higher energy β− emitters and α emitters. A polymerizable scintillant was prepared to prevent leaching of fluors. The relationship between particle size, kinetic energy of β− particles and counting efficiency was simulated by a theoretical model.

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