Intrinsic quadrupole moment of the superdeformed band in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Dy</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>152</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

The attenuation of the Doppler shift has been measured for \ensuremath{\gamma} rays emitted from the superdeformed states in the nucleus $^{152}\mathrm{Dy}$, recoiling in a $^{108}\mathrm{Pd}$ target and its gold backing. The transitions from the high-spin members of the superdeformed band are fully shifted, indicating feeding times of not more than a few femtoseconds. The partially shifted low-spin transitions yield a quadrupole moment of 19\ifmmode\pm\else\textpm\fi{}3 e\ensuremath{\cdot}b, in excellent agreement with the value expected for a superdeformed shape.