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Crystal electric field and possible coupling with phonons in Kondo lattice <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">CeCuGa</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
We investigate the magnetic and crystal electric field (CEF) states of the Kondo lattice system ${\mathrm{CeCuGa}}_{3}$ by muon spin relaxation ($\ensuremath{\mu}\mathrm{SR}$), neutron diffraction, and inelastic neutron scattering (INS) measurements. A noncentrosymmetric ${\mathrm{BaNiSn}}_{3}$-type tetragonal crystal structure (space group $I4\phantom{\rule{0.16em}{0ex}}mm$) is inferred from x-ray as well as from neutron powder diffraction. The …