Speaker
Description
Nuclear isomers are beginning to play an ever important role in unravelling the nuclear structure changes at higher spins and excitations. The seniority isomers constitute a separate class of isomers which are not exactly spin isomers. Very recently, we have shown the emergence of a new class of seniority isomers for the first time, which decay by odd-multipole transitions. This finding has led to many additional findings and explanations of some of the longstanding puzzles in nuclear structure physics. For example, we could address one of the long standing puzzles in nuclear structure physics, that of a asymmetric and double hump behavior of the B(E2; 2+→0+) values across the chain of Sn isotopes. Using the simple Generalized Seniority approach, we are able to show that a change of dominating orbitals from g7/2 to h11/2 after the mid-shell is responsible for the observed behavior. This simple yet robust interpretation is supported by the shell model calculations. We further strengthen this interpretation by expanding the Generalized seniority approach to magnetic moments and quadrupole moments, which is also able to explain the observed features in other isotopic chains.
References:
Odd – tensor electric transitions in high-spin Sn-isomers and generalized seniority
BhoomikaMaheshwari and Ashok Kumar Jain
Physics Letters B 753, 122 (2016).
Asymmetric behavior of the B(E2 ↑; 0+ → 2+) values in 104 – 130Sn and generalized seniority
BhoomikaMaheshwari , Ashok Kumar Jain and Balraj Singh
Nuclear Physics A952, 62 (2016).
Generalized Seniority States and Isomers in Tin Isotopes
A.K. Jain and BhoomikaMaheshwari
PhysicaScripta92, 074004 (2017).
Δv= 2 seniority changing transitions in yrast 3- states and B(E3) systematics of Sn isotopes
BhoomikaMaheshwari, Swati Garg and A.K. Jain
Pramana – J. of Phys., Rapid Communication, 89, 75 (2017).
g-factor calculations from the generalized seniority approach
BhoomikaMahshwari and A.K. Jain
EPJ Web of Conf. 178, 02006 (2018).
Generalized Seniority Schmidt Model and g-factors in semi-magic nuclei
Under Review.
Invited talk at the International Conference on “Recent Issues in Nuclear & Particle Physics”, February 3-5, 2019, Visva Bharti (Central University), Santi Niketan – 731235, West Bengal
