Nuclear Physics Laboratory
The mass and nature of neutrinos play an important role in theories beyond the standard model. Presently, 0νββ, which can occur if neutrinos have mass and are their own antiparticles, is perhaps the only experiment that can tell us whether the neutrino is a Dirac or a Majorana particle. Further, 0νββ can provide the information on absolute effective mass of the neutrinos. In India, a feasibility study to search for 0νββ in 124Sn has been initiated. The TIN.TIN experiment (The INdia’s TIN detector) will be housed at The India-based Neutrino Observatory (INO), an underground facility with ~ 1000 m rock cover all around. Development of cryogenic bolometer of 124Sn operating around 10 mK is in progress.
The Giant Dipole Resonance (GDR) gamma rays provide a very unique probe to study structure of excited nuclei at high angular momentum. Study the shape evolution of nuclei with angular momentum in A~160 region, has been the main focus in recent years. The group is actively engaged in the development of a novel detector array comprising LaBr3(Ce)+ NaI Phoswich as a part of PARIS (Photon Array for studies with Radioactive Ion and Stable beams) collaboration, for studying GDR in highly unstable nuclei.
Reactions with weakly bound stable and unstable nuclei provide opportunities to explore unusual features of nuclei like halo/skin structures, extended shapes and large breakup probabilities. We study this with experiments using stable beams like 6,7Li at PLF, Mumbai and using Radioactive ion beams like 6,8He at GANIL (France).