This is the seventh volume of a series that provides a continuing forum for publication of developments in Wdssbauer effect methodology and in spectroscopy and its applications. Wdssbauer Effect Methodology, Volume 7, records the proceedings of the Seventh Symposium on Wdssbauer Effect Methodology. The symposium was sponsored by the New England Nuclear Corporation and interest was concentrated on spec troscopy, with some attention to methodology and applica tions. The Symposium was held in the Mercury Ballroom of the New York Hilton on January 31, 1971. Dr. N. Benczer Koller presided over the afternoon and evening sessions. About two hundred participants attended, demonstrating the continued high level of effort in the field and of interest in this series. Austin Science Associates, Elron, and Nuclear Science Instruments demonstrated their Wdssbauer equipment products. These were well received, and evidently are continuing to improve in utility and quality. Applications papers reported on local magnetic moment measurement and radiation damage studies. A large number of spectroscopy papers was presented and subject matter included work on Mossbauer parameters in iron, tin, and europium and on conversion electron spectroscopy. Method ology work reported included a source for Snl19-Sb12l, a "blackness" distortion removal technique, and use of radio frequency fields. A paper is included on calculational techniques although it was not ready for presentation at the symposium.
