Details

Autor(en) / Beteiligte

• Kanter, E P
• Krässig, B
• Li, Y
• March, A M
• Ho, P
• Rohringer, N
• Santra, R
• Southworth, S H
• DiMauro, L F
• Doumy, G
• Roedig, C A
• Berrah, N
• Fang, L
• Hoener, M
• Bucksbaum, P H
• Ghimire, S
• Reis, D A
• Bozek, J D
• Bostedt, C
• Messerschmidt, M
• Young, L

Titel

Unveiling and driving hidden resonances with high-fluence, high-intensity x-ray pulses

Ist Teil von

• Physical review letters, 2011-12, Vol.107 (23), p.233001-233001, Article 233001

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We show that high fluence, high-intensity x-ray pulses from the world's first hard x-ray free-electron laser produce nonlinear phenomena that differ dramatically from the linear x-ray-matter interaction processes that are encountered at synchrotron x-ray sources. We use intense x-ray pulses of sub-10-fs duration to first reveal and subsequently drive the 1s↔2p resonance in singly ionized neon. This photon-driven cycling of an inner-shell electron modifies the Auger decay process, as evidenced by line shape modification. Our work demonstrates the propensity of high-fluence, femtosecond x-ray pulses to alter the target within a single pulse, i.e., to unveil hidden resonances, by cracking open inner shells energetically inaccessible via single-photon absorption, and to consequently trigger damaging electron cascades at unexpectedly low photon energies.