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D Bernhardt et al 2012 J. Phys.: Conf. Ser. 388 012007 doi:10.1088/1742-6596/388/1/012007
D Bernhardt1, C Brandau1,2, C Kozhuharov2, A Müller1, S Schippers1, S Böhm1, F Bosch2, J Jacobi1, S Kieslich1, H Knopp1, P H Mokler1,3, F Nolden2, W Shi1, Z Stachura4, M Steck2 and T Stöhlker2,5
Show affiliationsDielectronic recombination (DR) of Be-like 136Xe50+ was measured by employing the electron-ion merged-beam technique at the storage ring ESR of GSI in Darmstadt, Germany. We present results covering the center-of-mass energy range 0 − 4 eV. In addition to Rydberg series of resonances associated with ground-state intra L-shell excitations, resonances were found which are formed during DR of initially metastable 136Xe50+(2s2p 3P0) parent ions. This state is the first excited state and is long lived because the J=0 → J=0 transition and the absence of nuclear spin make the rare E1M1 two-photon transition the lowest-order decay channel. Future measurements which will monitor the strength of the resonances as function of storage time may be exploited for a measurement of the E1M1 two photon transition rate.
34.80.Lx Recombination, attachment, and positronium formation
32.10.Fn Fine and hyperfine structure
32.80.-t Photoionization and excitation
31.30.Gs Hyperfine interactions and isotope effects
32.70.Cs Oscillator strengths, lifetimes, transition moments
Issue 1 (2012)
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D Bernhardt et al 2012 J. Phys.: Conf. Ser. 388 012007
