Spectral Shape of the Two-Photon Decay of the 2 {sup 1}S{sub 0} State in He-Like Tin

Journal Article · Thu Jan 21 23:00:00 EST 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.033001· OSTI ID:21386752

Trotsenko, S ^[1]; Kumar, A; Beyer, H F; Braeuning, H; Fritzsche, S; Kozhuharov, C; Spillmann, U; Winters, D ^[2]; Volotka, A V ^[3]; Banas, D; Jagodzinski, P ^[4]; Gumberidze, A ^[5]; Hagmann, S; Hess, S; Salem, S ^[1]; Reuschl, R; Trassinelli, M ^[6]; Simon, A ^[7]; Tribedi, L C ^[8]; Weber, G ^[2]

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1. Institut fuer Kernphysik, Universitaet Frankfurt, D-60438 Frankfurt (Germany)
2. GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany)
3. Institut fuer Theoretische Physik, Technische Universitaet Dresden, D-01062, Dresden (Germany)
4. Institute of Physics, Jan Kochanowski University, 25-406 Kielce (Poland)
5. ExtreMe Matter Institute EMMI, GSI, D-64291 Darmstadt (Germany)
6. Institut des Nanosciences de Paris, CNRS and Universite Pierre et Marie Curie-Paris 6, 75015 Paris (France)
7. Institute of Physics, Jagiellonian University, Krakow (Poland)
8. Tata Institute of Fundamental Research, Mumbai (India)

The spectral distribution of the 1s2s {sup 1}S{sub 0}->1s{sup 2} {sup 1}S{sub 0} two-photon decay of He-like tin was measured using a novel approach at the gas-jet target of the ESR storage ring. Relativistic collisions of Li-like projectiles with low-density gaseous matter have been exploited to selectively populate the desired 1s2s state. Compared to conventional techniques, this approach results in a substantial gain in statistical and systematic accuracy, which allowed us to achieve for the first time a sensitivity to relativistic effects on the two-photon decay spectral shape as well as to discriminate the measured spectrum for Sn from theoretical shapes for different elements along the He-isoelectronic sequence.

• OSTI ID: 21386752
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
BOSONS
COLLISIONS
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ESR STORAGE RING
MASSLESS PARTICLES
METALS
PARTICLE DECAY
PHOTONS
RELATIVISTIC RANGE
S STATES
SENSITIVITY
SPECTRA
STORAGE RINGS
TIN