[en] This proceedings include the 8 lectures presented at the School on Applications of Nuclear Gamma Resonance Spectroscopy (Moessbauer Spectroscopy) held in ICTP Trieste, between 11-16 August 1986. A separate abstract was prepared for each of those lectures

[en] The possibility of utilizing the Moessbauer reflection technique based on the detection of the internal conversion electrons was envisaged soon after the discovery of the effect. The typical application of this technique is study of the surface properties after various treatments. 33 refs, 30 figs, 3 tabs

[en] Moessbauer spectra have been used as ''fingerprints'' in obtaining information an ancient Egyptian pottery and in fine art. An empirical relation has been found that connects the natural radiation dose with the intensity ratio of the two non-magnetic central peaks. It was suggested that this relation be used for dating ancient pottery. 8 refs, 13 figs, 2 tabs

[en] One of the main interests for a metallurgist is to find correlations between the microstructure of a given metal or alloy and its physical and chemical properties. Among the rather new techniques utilized in the field, Moessbauer spectroscopy became an indispensable tool for phase analysis, the study of phase transformations and surface studies. 41 refs, 25 figs, 1 tab

[en] The paper is a review of the Moessbauer spectroscopy methodology, namely: Moessbauer spectrometers (with emphasis on the data acquisition in time mode with microcomputer controlled systems and data analysis), criteria for the choice of the sources, types of detectors for gamma radiation and non-conventional applications of Moessbauer spectroscopy. 49 refs, 14 figs

[en] The method to be discussed here can be described in two ways: either as Recoil-Free Gamma Resonance Absorption (RGRA) or as Moessbauer Spectroscopy. The latter term is the one now generally accepted. The reason for the use of the name of a particular person is the fact that this method has a unique history. It is to be hoped that the wonderful and even romantic story of its discovery will one day be told in full detail in a book which could, of course, only be written by that person himself. Rudolf Moessbauer. (author). 86 refs, 19 figs, 3 tabs

[en] The Moessbauer effect is concerned with the recoilless nuclear resonance absorption in solids and it appears surprising, at first sight, that it can be useful in investigating chemical systems. However, the γ-rays emitted in recoilless event have a spread in energy less than 10^-6 kJmol^-1 and constitute an unusually good source of monochromatic radiation. As a consequence, it is possible to investigate the week interactions (< 10^-3 KJmol^-1) between a proper nucleus with the electrons and ions which surround it, and in particular with the valance electrons which are mainly responsible for the chemical properties of any substance. Tabs and figs

[en] The paper focuses on applications to magnetism of the Fe-57 Moessbauer spectroscopy. The unique possibility offered by this technique of directly observing the magnetic hyperfine structure of nuclear levels has made it an essential tool for investigating magnetically ordered systems. A few relevant examples of different amorphous systems studied with this technique and the study of the magnetism of small particles are also discussed. 22 refs, 17 figs, 1 tab

[en] The paper focuses on Fe-57 high pressure Moessbauer spectroscopy. After reviewing the high pressure technique source, examples are selected in such a way that the pressure induced changes of the hyperfine interaction parameters can be clearly seen. 27 refs, 12 figs