Using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mover accent="true"><mml:mi mathvariant="normal">C</mml:mi><mml:mo>ˇ</mml:mo></mml:mover></mml:math>erenkov radiation for measuring the refractive index in thick samples by interferometric cathodoluminescence
Ultramicroscopy