It is a pleasure to present this special issue of the Journal of Radioanalytical and Nuclear Chemistry dedicated to the 4th International Nuclear Chemistry Congress, 4th-INCC, which took place at Maresias Beach, Brazil, on September, 14–19, 2014.

The Congress was an excellent opportunity for the international nuclear community to exchange experiences and show up-to-date research results on a wide range of themes such as Radiochemistry, Radiation Chemistry, Radioanalytical Chemistry, Education in Nuclear Chemistry, Radiopharmaceutical Chemistry, Radioecology and Geochemistry, Radiation Protection, Nuclear Reactors and Nuclear and Related Techniques.

The 4th-INCC counted on 11 invited speakers and more than 200 contributions as oral or poster presentation from 23 countries. Finally the peer revision resulted in this special issue with 30 papers.

Acknowledgements are due to all the Brazilian and international financial agencies and companies, the International Atomic Energy Agency (IAEA), The International Nuclear Chemistry Society (INCS), the Congress local organizing committee, dedicated reviewers, anxious authors and the JRNC editors and staff, for making this publication possible.

We hope that the nuclear chemistry community may benefit by the sharing of knowledge that the 4th International Nuclear Chemistry Congress provided.

Edson Gonçalves Moreira

JRNC Associate Editor

Marina Beatriz Agostini Vasconcellos

4th-INCC Chair