Isotope shift in the dielectronic recombination of three-electron ANd57+.
/ Authors
C. Brandau, C. Kozhuharov, Z. Harman, A. Mueller, S. Schippers, Y. Kozhedub, D. Bernhardt, S. Boehm, J. Jacobi, E. Schmidt
and 18 more authors
P. Mokler, F. Bosch, H. Kluge, Th. Stöhlker, K. Beckert, P. Beller, F. Nolden, M. Steck, A. Gumberidze, R. Reuschl, U. Spillmann, F. J. Currell, I. I. Tupitsyn, V. Shabaev, U. Jentschura, C. Keitel, Andreas Wolf, Z. Stachura
/ Abstract
Isotope shifts in dielectronic recombination spectra were studied for Li-like (A)Nd(57+) ions with A=142 and A=150. From the displacement of resonance positions energy shifts deltaE(142 150)(2s-2p(1/2))=40.2(3)(6) meV [(stat)(sys)] and deltaE(142 150)(2s-2p(3/2))=42.3(12)(20) meV of 2s-2p(j) transitions were deduced. An evaluation of these values within a full QED treatment yields a change in the mean-square charge radius of (142 150)deltar(2)=-1.36(1)(3) fm(2). The approach is conceptually new and combines the advantage of a simple atomic structure with high sensitivity to nuclear size.
Journal: Physical review letters