A McPherson et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L767 doi:10.1088/0953-4075/30/21/008
Evidence of enhanced multiphoton (248 nm) coupling from single-pulse energy measurements of Xe(L) emission induced from Xe clusters
A McPherson
, J Cobble
, A B Borisov,§, B D Thompson, F Omenetto, K Boyer and C K Rhodes,§
LETTER TO THE EDITOR
Single-pulse energy measurements of the Xe(L) emission induced by femtosecond 
multiphoton ultraviolet (248 nm) excitation of Xe clusters have been made with a transmission grating spectrograph equipped with a calibrated x-ray CCD camera. On the basis of the observed magnitude of the Xe(L) single-pulse yield 
and the morphology measured by Thomson scattering of the self-trapped channels guiding the incident 248 nm pulse, it is concluded that the coupling strength for x-ray production from the clusters cannot be accounted for by an interaction involving only independent single-electron processes. Analysis indicates that the coupling requires augmentation by a factor of 
. This conclusion is in good agreement with an independent spectral study involving the direct comparison of the multiphoton coupling strength with electron collisional data for Xe obtained from EBIT studies, an analysis which placed the corresponding factor of augmentation of the coupling in the interval 
. These findings are consistent with estimates of the magnitude of the strengthened coupling which could arise from the development of ordered multi-electron motions.
- PACS
-
36.40.Mr Spectroscopy and geometrical structure of clusters
33.80.Rv Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
- Subjects
- Dates
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Issue 21 (14 November 1997)
Received 7 July 1997, in final form 9 September 1997
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Evidence of enhanced multiphoton (248 nm) coupling from single-pulse energy measurements of Xe(L) emission induced from Xe clusters
A McPherson et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L767
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Saturated multikilovolt x-ray amplification with Xe clusters: single-pulse observation of Xe(L) spectral hole burning
Alex B Borisov et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 L285
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Amplification at λ ~ 2.8 Å on
double-vacancy states produced by 248 nm excitation of Xe clusters in plasma channels
Alex B Borisov et al 2005 J. Phys. B: At. Mol. Opt. Phys. 38 3935
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Competition between multiphoton xenon cluster excitation and plasma wave Raman scattering at 248 nm
A McPherson et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 L291
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Dynamical orbital collapse drives super x-ray emission
A B Borisov et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 247
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An efficient, selective collisional ejection mechanism for inner-shell population inversion in laser-driven plasmas
W Andreas Schroeder et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 297
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Z -
imaging of Xe(M) and Xe(L) emissions from channelled propagation of intense femtosecond 248 nm pulses in a Xe cluster target
A B Borisov et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 L113
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Stability analysis of relativistic and charge-displacement self-channelling of intense laser pulses in underdense plasmas
A B Borisov et al 1995 Plasma Phys. Control. Fusion 37 569
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Intensity dependence of the multiphoton-induced Xe(L) spectrum produced by subpicosecond 248 nm excitation of Xe clusters
A B Borisov et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 L43
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Acoustic black holes: horizons, ergospheres and Hawking radiation
Matt Visser 1998 Class. Quantum Grav. 15 1767
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