Open AccessTwo-photon decay in highly charged heavy ions: Spectral shape of the 2E1 (21S0→ 11S0) in He-like tin
Author(s) -
Ajay Kumar,
S. Trotsenko,
A. V. Volotka,
D. Banaś,
H F Beyer,
H. Bräuning,
S. Fritzsche,
A. Gumberidze,
S. Hagmann,
Sebastian Heß,
C. Kozhuharov,
G. Plunien,
R. Reuschl,
U. Spillmann,
Martino Trassinelli,
G. Weber,
Th. Stöhlker
Publication year - 2009
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/163/1/012027
Subject(s) - ion , physics , photon , heavy ion , atomic physics , nuclear physics , optics , quantum mechanics
International audienceWe have measured the two-photon 2E1 transition from the singlet 1s2s 1S0 to the 1s21S0 ground state of helium-like tin. The experiment was performed by using initially Li-like tin ions in collision with a nitrogen gas target at the ESR storage ring at the energy of 300 MeV/u. The two-photon emission arises from the decay of the exclusively formed 1s2s states following the ionization of one K-shell electron from the Li-like ions. The obtained spectral shape of the 1s2s1S0 - 1s21S0 (2E1) transition was compared with the one calculated within a relativistic approach. The spectral shape is displayed and its sensitivity with regard to details in the theoretical description of the 2E1 decay is discussed