A Ride on Time Machine (Susanta Lahiri, Saha Institute of Nuclear Physics (SINP), India)

Thursday 9 Apr 2015, 10:00 → 11:30 Asia/Tokyo

RIBF Bldg. 2F Coference room (RIKEN Wako)

Title: A Ride on Time Machine Speaker: Prof. Susanta Lahiri, Saha Institute of Nuclear Physics (SINP), India Date: Thursday, April 9, 10:00 - Place: 2F Conference Room, RIBF Building Abstract: More than 100 years before George de Hevesy discovered radiotracer technique for which he was awarded Nobel Prize in 1943. The radiotracer technique play important role not only in interpreting data of other associated branches of sciences but also can easily penetrate and help to solve problems in humanities to recognize the development of human civilization from past to present. Nature has created its own archive billion years before so that every important incident in the galaxy or in the Earth can be tracked. We have developed efficient chemical methods, which are prerequisite to get supernova signals or dirty incident that took place around our Earth few million years before. Similarly the radiotracer method developed by us gave a handle to track the silk route of human trade in ancient societies. In the seminar I will give glimpse of two time scales in the past, one is million years before and other is on recent past - in the scale of few thousand years before and show how the radiotracer technique developed by us helps to unravel the mystery.