The Organizing Committee is very happy to invite you to participate in the 4th-International Nuclear Chemistry Congress, 4th-INCC 2014, which will take place in the beautiful beach area of Maresias, located in the North shore of the State of São Paulo, Brazil. The INCC Congress series started in 2005, after the creation of the International Nuclear Chemistry Society (INCS), which was initiated by Dr. Turan ünak of Ege University, Izmir,Turkey. The first INCC Congress was held in Kusadasi, Turkey in May 2005, followed by Cancun, Mexico, in April 2008 and Sicily, Italy, in September 2011. This series of scientific events served as excellent opportunity for exchange of knowledge, for scientists from different subject areas, where the production and investigation on the peaceful uses of radioisotopes and nuclear radiation can contribute significantly to the technical progress of humanity. Due to the success of the INCC Congresses, it was decided by the International Nuclear Chemistry Society that they should be held at every three years. Peer reviewed and selected papers presented at the 4th-INCC 2014 will be published in a special issue of the Journal of Radioanalytical and Nuclear Chemistry as the 4th-INCC 2014 Proceedings. We look forward to meeting you in Maresias in September 2014!