Ultrahigh-Resolution<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi></mml:math>-Ray Spectroscopy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Gd</mml:mi><mml:mprescripts/><mml:none/><mml:mn>156</mml:mn></mml:mmultiscripts></mml:math>: A Test of Tetrahedral SymmetryM. Jentschel, P. Petkov, J. Krempel et al.|Physical Review Letters|2010Cited by 40