Phonon Dispersion Relation for Copper Measured by Triple Axis Spectrometer at CARR

In 2013,the triple axis spectrometer at China Advanced Research Reactor has been put into operation successfully.After spectrometer commissioning,including modification of the scan programs and determination of the zero point of the spectrometer angles,the frequency/wave-vector dispersion relation in copper at room temperature has been measured.The results are shown in Fig.1.As the