Eur. Phys. J. A (2005) 26: 311-314
https://doi.org/10.1140/epja/i2005-10182-3

Original Article

Nuclear quadrupole moments of 5/2^- and 9/2^- states in ¹⁶⁹Ta

¹ Centre for Advanced Studies in Physics, Panjab University, 160 014, Chandigarh, India
² Inter-University Accelerator Centre, JNU Campus, 110 067, New Delhi, India

^* e-mail: akbhati@pu.ac.in

Received: 17 July 2005
Accepted: 7 December 2005
Published online: 27 December 2005

Abstract

The nuclear spectroscopic quadrupole moments for the πh _9/25/2^-, 1/2^-[541] and the πh _11/29/2^-, 9/2^-[514] isomeric states in ¹⁶⁹Ta have been measured employing the time differential perturbed angular-distribution technique following the nuclear reaction ¹⁵⁹Tb(¹⁶O, 6nγ)¹⁶⁹Ta at beam energy 104 MeV. The ratio of the intrinsic quadrupole moments has been derived as 1.87(13) from the measured quadrupole precession frequencies of the corresponding states. The model-independent analysis of the equilibrium deformation indicates strong prolate- and oblate-driving nature of the 1/2^-[541] and 9/2^-[514] orbitals in ^169,171Ta isotopes, respectively.