Competition between proton and neutron excitations in $^{96}$Zr


Kumbartzki G, Benczer-Koller N, Holden J, Jakob G, Mertzimekis TJ, Taylor MJ, Speidel K-H, Ernst R, Stuchbery AE, Beausang CW, et al. Competition between proton and neutron excitations in $^{96}$Zr. Phys. Lett. B. 2003;562:193–200.


The g factors of the 2+1 and 3-1 states in 96Zr have been measured for the first time by Coulomb excitation of 96Zr beams in inverse kinematics using transient magnetic fields. The resulting g factors are g(2+1) = +0.03(7) and g(3-1) = +0.98(15). The lifetime of the 2+1 state, ? = 0.82(10) ps, was redetermined via the Doppler Shift Attenuation Method. The 2+1 ? 0+1 transition rate and the g-factor data are in fair agreement with shell-model calculations involving both proton and neutron excitations. The pronounced octupole strength of the 3-1 ? 0+1 transition is not seen in the g factor which exceeds significantly an expected Z/A value. © 2003 Elsevier Science B.V. All rights reserved.