Аннотация:The computer pack REFTIM calculates and fits the time spectra of the nuclear resonant reflectivity, delayed and prompt reflectivity curves and corresponding conversion electron Mössbauer spectrum (CEMS) for any multilayer structure, containing 57Fe, 151Eu, 149Sm, 119Sn or other isotopes if they have M1 Mössbauer transition. The experimental details of the nuclear resonance scattering technique with synchrotron radiation are described in the ID18 beamline Web pages (European Synchrotron Radiation Facility - ESRF). After the installation of the Synchrotron Mössbauer Source at ID18 of the ESRF the possibility opened to measure the Mössbauer spectra of reflectivity at the energy scale. For the treatment of this data type a new version called REFSPC has been created in 2015. The program REFSPC calculates and fits the Mössbauer spectra of reflectivity forspecified grazing angles, the angular dependencies of the X-rays and nuclear resonancereflectivity and CEMS spectra measured at normal incidence from any multilayer structure containing Mössbauer isotope 57Fe. Here you can download this program and its manual.