NUCLEAR INELASTIC-SCATTERING OF SYNCHROTRON-RADIATION BY SN-119

We have investigated inelastic scattering of synchrotron radiation by Sn-119 nuclei using the radiative channel of nuclear deexcitation. The energy dependence of nuclear scattering of the 23.8795-keV x rays by a beta-Sn foil was measured with sub-meV energy resolution. In the con ditions of the experiment the scattering was incoherent over the vario us nuclei and averaged over the phonon momentum transfer. The experime ntal data are compared with the theory of nuclear inelastic absorption . The general agreement is reasonable, however, some deviation is note d. The possible origin of the discrepancy is discussed. [S0163-1829(98 )02626-5].