Jakob G, Benczer-Koller N, Holden J, Kumbartzki G, Mertzimekis TJ, Speidel K-H, Ernst R, Maier-Komor P, Beausang CW, Kru?cken R.
First measurements of the g factors of the 2$_1^+$ and 3$_1^-$states of semi-magic $_{40}^{90}$Zr. Phys. Lett. B. 2000;494:187–192.
AbstractThe g factors of the 21/+ and 31/- 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(21/+) = +1.25(21) and g(31/3) = +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 21/+ state was measured by the Doppler shift attenuation method, ? = 0.126(3) ps. (C) 2000 Elsevier Science B.V.
Holden J, Benczer-Koller N, Jakob G, Kumbartzki G, Mertzimekis TJ, Speidel K-H, Macchiavelli A, McMahan M, Phair L, Maier-Komor P, et al. Evidence for 2f$_{1/2}$ neutron strength in the low-energy structure of $^{144,146,148,150}Nd isotopes. Phys. Lett. B. 2000;493:7–11.
AbstractThe Bardeen model - the first regular black hole model in General Relativity - is reinterpreted as the gravitational field of a nonlinear magnetic monopole, i.e., as a magnetic solution to Einstein equations coupled to a nonlinear electrodynamics. (C) 2000 Elsevier Science B.V.
