Abstract
The g factors of the 2 + 1 and 3 − 1 states in semi-magic 90Zr have been measured for the first time with the technique of Coulomb excitation of 90Zr beams in inverse kinematics in combination with transient magnetic fields. The resulting g factors, g(2 + 1)=+1.25(21) and g(3 − 1)=+0.986(56), are both consistent with a dominant g 9/2 proton configuration and a closed N=50 neutron shell. The lifetime of the 2 + 1 state was measured by the Doppler shift attenuation method, τ=0.126(3) ps.
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