We have investigated the dipole response of the stable N = 50 nucleus 89Y up to the excitation energy of the giant dipole resonance (GDR) using the bremsstrahlung facility at the ELBE accelerator at the research center Helmholtz-Zentrum DresdenRossendorf. After eliminating background radiation from atomic processes as well as inelastic transitions in the spectra by using statistical methods, the photoabsorption cross section could be deduced from the photon-scattering data. This cross section was combined with that known from (γ, n) experiments. An excess of the cross section relative to a simple Lorentz approximation of the tail of the GDR is found in the energy range from about 6 MeV up to 11 MeV. The comparison with predictions of a quasiparticle-random-phase approximation (QRPA) showed that the corresponding excitations may be caused by an oscillation of the excessive neutrons forming a so-called pygmy dipole resonance (PDR) as it was found for the neighbouring isotones 88Sr and 90Zr.Istraživali smo dipolne rezonancije u stabilnoj jezgri 89Y s N = 50 do energije uzbude giganske dipolne rezonancije (GDR) rabeći sustav za kočno zračenje pri ubrzivaču ELBE u istraživačkom središtu Dresden-Rosendorf. Nakon uklanjanja pozadinskog zračenja od atomskih procesa kao i od neelastičnih prijelaza u spektrima, mogli smo, primjenom statističkih metoda, odrediti fotoapsorpcijske udarne presjeke za podatke o fotonskom raspršenju. Ti su udarni presjeci povezani s onima iz mjerenja (γ, n) reakcija. Našli smo višak u udarnim presjecima u odnosu na jednostavno Lorentzovo približenje u repu GDR, u području energije od oko 6 MeV do 11 MeV. Usporedba s približenjem kvazičestica i slučajnih faza pokazuje na mogućnost da su odgovorne uzbude uzrokovane oscilacijama viška neutrona koji načine tzv. “pigmy” dipolnu rezonanciju, nađenu u susjednim izotonima 88Sr i 90Zr
