Spectral Shape of the Two-Photon Decay of the 2 1S0 State in He-Like Tin
Sergiy Trotsenko
(1)
,
A. Kumar
,
A. V. Volotka
(2)
,
D. Banas
,
Heinrich Beyer
(1)
,
Harald Bräuning
(1)
,
Sephan Fritzsche
(1)
,
Alexander Gumberidze
(1)
,
S. Hagmann
(1)
,
S. Hess
,
Pawel Jagodzinski
(3)
,
Christophor Kozhuharov
(1)
,
Regina Reuschl
(1, 4)
,
S. Salem
,
A. Simon
,
Uwe Spillmann
(1)
,
Martino Trassinelli
(4)
,
L. Tribedi
(5)
,
G. Weber
(1)
,
Danyal Winters
(1)
,
Thomas Stöhlker
(1, 6)
A. Kumar
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D. Banas
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S. Hess
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- PersonId : 758130
- IdHAL : seb-hess
- ORCID : 0000-0001-5753-0991
- IdRef : 131208063
Christophor Kozhuharov
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S. Salem
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A. Simon
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- ORCID : 0000-0003-4641-6186
- IdRef : 177556099
Martino Trassinelli
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- IdHAL : martino-trassinelli
- ORCID : 0000-0003-4414-1801
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Thomas Stöhlker
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Résumé
The spectral distribution of the 1s2s 1S0→1s2 1S0 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.