Far-infrared elastic scattering proposal for the Avogadro Project's silicon spheres
Yükleniyor...
Dosyalar
Tarih
2018-05
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Avogadro constant determines the number of particles in one mole of a substance, thus relating the molar mass of the substance to the mass of this substance. Avogadro constant is related to Systeme Internationale base units by defining the very concept of chemical quantity. Revisions of the base units created a need to redefine the Avogadro constant, where a collaborative work called the Avogadro Project is established to employ optical interferometry to measure the diameter of high quality 100 mm silicon spheres. We propose far-infrared spectroscopy for determining the Avogadro constant by using elastic scattering from the 100 mm Avogadro Project silicon spheres. Similar spectroscopic methods are already in use in the near-infrared, relating whispering gallery modes of the 1 mm silicon spheres to the diameter of the spheres. We present numerical simulations in the far-infrared and the near-infrared, as well as spatially scaled down elastic scattering measurements in the near-infrared. These numerical and experimental results show that, the diameter measurements of 100 mm single crystal silicon spheres with elastic scattering in the far-infrared can be considered as an alternative to optical interferometry.
Açıklama
Anahtar Kelimeler
Avogadro constant, Avogadro Project, Elastic scattering, Far-infrared spectroscopy, Lorenz-mie theory, Morphology-dependent resonances, Near-infrared spectroscopy, Optical interferometry, Silicon sphere, Terahertz spectroscopy, Whispering gallery modes, Quantum-cascade lasers, Single-crystal, Molar volume, Dielectric spheres, Optical-fibers, Wave-guides, Mu-m, Constant, Resonances, Kilogram, Precision balances, Measurements, Joule balance, Infrared devices, Infrared spectroscopy, Interferometry, Optical resonators, Silicon, Silicon wafers, Single crystals, Spectroscopic analysis, Spheres, Mie theory, Morphology dependent resonances, Computer simulation, Conceptual framework, Diameter, Numerical model, Theoretical study
Kaynak
Journal of Quantitative Spectroscopy and Radiative Transfer
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
210
Sayı
Künye
Humayun, M. H., Khan, I., Azeem, F., Chaudhry, M. R., Gökay, U. S., Murib, M. S. & Serpengüzel, A. (2018). Far-infrared elastic scattering proposal for the avogadro project's silicon spheres. Journal of Quantitative Spectroscopy and Radiative Transfer, 210, 173-179. doi:10.1016/j.jqsrt.2017.12.023
