Research Projects

The proposal focuses on experimental studies of isomers, particularly seniority isomers in semi-magic nuclei, evolution of octupole deformations, competition with seniority, isomeric decays, low-lying excitations, and states below isomers. A wide range of lifetime measurements of excited nuclear states is required using direct timing methods. Current detecting facilities in India allow for a wide range of lifetimes from femtoseconds to microseconds. However, current techniques struggle to study low-lying states below the isomers due to hindrance in transitions. The direct timing method with HPGe and fast-timing LaBr3 detectors can cover the lifetime range of over 200 ps. To measure lower lifetimes below 200 ps without compromising solid angle coverage and detection efficiency, further advancements or modifications in detector crystal size and precise characterization are needed. This research goal will be coupled with high-resolution HPGe detectors and an improved DAQ system, along with other auxiliary devices, particularly in heavy mass nuclei to veto fission events dominant in the heavy mass region. Specific scientific goals include exploring seniority isomers, shape coexistence, and octupole correlations in 201,202Po, followed by spectroscopy and lifetime measurements of low-lying excitations in 214Po below the 8+ isomer. These investigations can help address the rigidity of magic gaps and location of single-particle orbitals, especially in the vicinity of 208Pb. The new detectors and DAQ system will contribute to future collaborative experiments on fast timing measurements and establish a nuclear structure lab at IIT Ropar for Masters projects and PhD students. This three-year CRG grant will eventually lead to better lifetime measurements of short-lived excited states and a better understanding of nuclear structure.