Helical modes generate anti-magnetic rotational spectra in nuclei

4^th International Conference on Atomic and Nuclear Physics

October 26-27, 2018 | Boston, USA

Sham S Malik

Guru Nanak Dev University, India

Posters & Accepted Abstracts: J Astrophys Aerospace Technol

Abstract :

A systematic analysis of the anti-magnetic rotation band using r-helicity formalism is carried out for the first time. The observed octupole correlation in a nucleus is likely to play a role in establishing the anti-magnetic spectrum. Such octupole correlations are explained within the helical orbits. In a rotating eld, two identical fermions (generally protons) with paired spins generate these helical orbits in such a way that its positive (i.e., up) spin along the axis of quantization refers to one helicity (right-handedness) while negative (down) spin along the same quantization-axis decides another helicity (left-handedness). Since the helicity remains invariant under rotation, therefore the quantum state of a fermion is represented by definite angular momentum and helicity. These helicity represented states support a pear-shaped structure of a rotating system having z-axis as the symmetry-axis. A combined operation of parity, time-reversal and signature symmetries ensures an absence of one of the signature partner band from the observed antimagnetic spectrum. This formalism has also been tested for the recently observed negative parity DeltaI=2 anti-magnetic spectrum in odd-A 101P d nucleus and explains nicely its energy spectrum as well as the B(E2)-values. Further, this formalism is found to be fully consistent with twin-shears mechanism popularly known for such type of rotational bands. It also provides signi cant clue for extending these experiments in various mass regions spread over the nuclear chart.

Biography :

E-mail: shammalik@yahoo.com