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The energy gap has been measured and the characteristic phonon energiesdetermined for the superconducting compound $La_{1.8}Sr_{02}CuO_4$ from thecurrent-voltage characteristics of point contacts with a coppercounterelectrode. The temperature dependence of the energy gap was determined.pacs 73.40.Jn, 74.25.Kc, 74.45.+c, 73.40.-c, 74.20.Mn, 74.70.Ad, 74.72.-h, Dn

Point contact spectroscopy of the high-temperature superconductor $La_{1.8}Sr_{0.2}CuO_{4}$