Observation of 2p3d(1Po)→1s3d(1De) radiative transition in He-like Si, S, and Cl ions.
We present an experimental determination of the 2p3d(1Po)→1s3d(1De) x-ray line emitted from He-like Si, S, and Cl projectile ions, excited in collisions with thin carbon foils, using a high-resolution bent-crystal spectrometer. A good agreement between the observation and state-of-the-art relativistic calculations using the multiconfiguration Dirac-Fock formalism including the Breit interaction and QED effects implies the dominance of fluorescent decay over the autoionization process for the 2p3d(^{1}P^{o}) state of He-like heavy ions. This is the first observation of the fluorescence-active doubly excited states in He-like Si, S, and Cl ions.
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India and Department of Physics, Institute of Chemical Technology, Mumbai 400019, India.
S
S
Kasthurirangan
Narula Institute of Technology, Agarpara, Kolkata 700109, India.
J K
JK
Saha
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India.
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AN
Agnihotri
Acharya Prafulla Chandra College, Kolkata 700131, India.
S
S
Bhattacharyya
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India.
D
D
Misra
Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
A
A
Kumar
Ramakrishna Mission Vivekananda University, Howrah 711202, India.
P K
PK
Mukherjee
Centro de Física Atómica, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal.
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JP
Santos
Centro de Física Atómica, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal.
A M
AM
Costa
Laboratoire Kastler Brossel, École Normale Supérieure, CNRS, Université P. et M. Curie-Paris 6, Case 74; 4, place Jussieu, 75252 Paris CEDEX 05, France.
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P
Indelicato
Narula Institute of Technology, Agarpara, Kolkata 700109, India.
T K
TK
Mukherjee
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India.
L C
LC
Tribedi