## Boris Castel

## Degree:

PhD (Lyon)

## Research Areas:

Theoretical Investigations in Nuclear Structure (B. Castel, M. Rogers; Queen's University and L. Zamick; Rutgers University)

One of the major endeavours of nuclear structure has been to describe nuclear properties in terms of an effective nucleon-nucleon interaction. Yet fifty years after parameterizing that interaction in terms of the central, spin-orbit and tensor components, the role of the latter remains elusive. Our work consists in analyzing spin-dependent and tensor related observables to shed light on the relative contributions of the nuclear force components starting from first principles.

Recently we have concentrated our studies on** nuclear polarizability** as a response to **spin-dependent probes**. This becomes a particularly promising window on nuclear properties which is still poorly understood but becomes increasingly recognized as a major component influencing the high-energy nuclear reaction data produced at several electron and proton beam facilities currently coming on line.

## References:

M. S. Fayache, L. Zamick and B. Castel "The Nuclear Tensor Interaction" Physics Reports 290 (1997) 201-282.