NuclearStructureGroup

Our research is focused on the structure of atomic nuclei and their dynamics when put into extreme conditions as high angular momentum and large excess of neutrons. Our research portfolio covers the following areas:

Exotic nuclei
Atomic Physics Our group studies the structure of exotic nuclei that have an excess of neutrons when compared to their stable counterparts. While some of those nuclei are easy to produce in the lab, other are more difficult and indeed are produced for the first time in the humankind history. Those nuclei reveal more about nuclear properties towards the neutron drip line, and are of paramount importance for the understanding of the r-process and the astrophysical environment where the heavier than iron elements are synthesized.

Nuclei at High-Spin
Atomic Physics Inside a nucleus, in normal conditions, the nucleons are bound into pairs. Those pairs however start to break when the nucleus is pushed to rotate. By studying the frequencies at which the pairs break we learn about the microscopic structure of the nucleus.

The unpaired nucleons interact with the core of paired nucleons via the Corriolis force - the same force that determines the dynamics of the Jupiter's large red spot.

Nuclear lifetimes
Atomic Physics Nuclear lifetimes are among the essential nuclear properties. They are related to transition strengths and give information about the wavefunctions of the states involved in these transitions. They cover a wide range of values from few femtoseconds to lifetimes larger than the age of the Universe, thus covering more than 40 orders of manitude. It is thus evident that no single method or instrument can cover such a vast range of values. To measure nuclear lifetimes, different methods and technologies have been developed in the last century. Among them is the fast-timing method, which relies on fast detectors and electronics. It is applicable for lifetimes as short as few tens of picoseconds. This is the time that takes for the light to travel a distance of just about 3 mm!

Our research is presently funded by the Bulgarian National Science fund.

Motivated students are welcome to join our team.