Welcome to Physics Group
Variable Energy Cyclotron Centre, Kolkata

High Energy Photon Spectroscopy

Giant Dipole Resonance: It corresponds to a collective motion involving almost all the particles in the nucleus. It can be viewed as small amplitude, out of phase vibration between the protons and the neutrons. The high-energy decay of GDR built on excited state provides us a unique tool to study the diverse properties of the nucleus at extreme conditions.

>Temperature & angular momentum dependence of the intrinsic GDR width. 

> Nuclear shapes at extreme conditions via GDR lineshapes. 

> Loss of collectivity, existence of a limiting temperature for collective motion in nuclei. 

> Influence of the lifetime of the CN on the observed GDR width. 

> Probing the time scale for thermal fluctuations and the validity of “adiabatic picture”. 

> Dissipative fission dynamics. 

Nucleon – Nucleon Bremsstrahlung: Nuclear bremsstrahlung (> 20 MeV) is released during the first stages of the nuclear reaction in which the nucleus is not equilibrated, allowing one to probe the nucleon-nucleon interaction and the dynamics of nuclear reactions. These high-energy g-rays help in understanding the early states of the nuclear reaction. 

> Nuclear medium effects. 

> Collision dynamics.