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1.
Calegari F Valentini G Vozzi C Benedetti E Cabanillas-Gonzalez J Faenov A Gasilov S Pikuz T Poletto L Sansone G Villoresi P Nisoli M De Silvestri S Stagira S 《Optics letters》2007,32(17):2593-2595
Elemental sensitivity in soft x-ray imaging of thin foils with known thickness is observed using an ultrafast laser-plasma source and a LiF crystal as detector. Measurements are well reproduced by a simple theoretical model. This technique can be exploited for high spatial resolution, wide field of view imaging in the soft x-ray region, and it is suitable for the characterization of thin objects with thicknesses ranging from hundreds down to tens of nanometers. 相似文献
2.
Vozzi C Calegari F Benedetti E Gasilov S Sansone G Cerullo G Nisoli M De Silvestri S Stagira S 《Optics letters》2007,32(20):2957-2959
Ultrabroadband self-phase-stabilized near-IR pulses have been generated by difference-frequency generation of a filament broadened supercontinuum followed by two-stage optical parametric amplification. Pulses with energy up to 1.2 mJ and duration down to 17 fs are demonstrated. These characteristics make such a source suited as a driver for high-order harmonic generation and isolated attosecond pulse production. 相似文献
3.
4.
N.B. Durusoy M. Baubillier R. George M. Goldberg A.M. Touchard N. Armenise M.T. Fogli-Muciaccia A. Silvestri 《Physics letters. [Part B]》1973,45(5):517-520
We have studied the I=2, ππ scattering using the classical Chew-Low extrapolation method. Results are given on the cross sections and the phase shifts δ02, δ22 and δ42 up to 2.2. GeV. δ02 values are -7.8 ? 3.0° at the Ko mass, -15. ? 1.5° at the ? mass and -29. ? 2.2° of the fo mass. Above the fo mass |δ02| decreases. 相似文献
5.
Sansone G Benedetti E Caumes JP Stagira S Vozzi C Pascolini M Poletto L Villoresi P De Silvestri S Nisoli M 《Physical review letters》2005,94(19):193903
By using a self-referencing technique, we have experimentally measured the influence of the carrier-envelope phase of femtosecond light pulses on the phase of the electric field of the radiation produced by high-order harmonic generation. We show that, in particular experimental conditions, the temporal evolution of the electric field of the attosecond pulses, is directly controlled by the carrier-envelope phase of the driving pulses. 相似文献
6.
Silvestri MA Miles D Rothwell AP Wood KV Cushman M 《Rapid communications in mass spectrometry : RCM》2003,17(15):1703-1708
Electrospray ionization (ESI) mass spectrometry was employed to obtain both molecular weight confirmation and structural information for a series of novel alkenyldiarylmethane (ADAM) analogs. The mass spectral data were intended for use during the structure elucidation of ester hydrolysis products formed during an in vitro metabolism study of a series of novel ADAM analogs. The data on the precursor molecules show the presence of the molecular ion peak, [M+H](+), as well as a peak consistent with the hydrolysis product of the original ester ([MH-ROH+H(2)O](+)). However, chemical ionization mass spectrometry, elemental analysis and (1)H NMR data indicated the presence of only the intact diester compounds, suggesting that the formation of the hydrolysis product was an instrumental artifact, i.e., in-beam hydrolysis during ESI or a result of longer ion residence times of the ion trap mass analyzer. 相似文献
7.
Villoresi P Bonora S Pascolini M Poletto L Tondello G Vozzi C Nisoli M Sansone G Stagira S De Silvestri S 《Optics letters》2004,29(2):207-209
We present a method for the optimization of high-order harmonic generation based on wave-front correction of the driving laser beam. The technique exploits wave-front adaptive control by means of a deformable mirror, governed by an optimization procedure. 相似文献
8.
The problems related to resonators suitable for generation of diffraction-limited beams of high power or energy, and a few of the most significant recent solutions, are reviewed. In particular, this paper is addressed to two promising resonator configurations developed mainly for Nd:YAG (yttrium aluminium garnet) lasers: dynamically stable resonators of minimum misalignment sensitivity for lasers with a strong thermal lensing in the active rod and unstable resonators with variable reflectivity output mirrors of super-Gaussian profile. For both cases experimental data and simple design guidelines are discussed. 相似文献
9.
S. Petruso S. Caronna S. Gambino G. Filardo G. Silvestri 《Journal of heterocyclic chemistry》1991,28(3):793-796
The electrochemical oxidation of 2,5-diphenyl-3-acetylpyrrole (I) is described. The cyclic derivative 1,6a-dihydro-2,5,6a-triphenyl-3,4-diacetylbenzo[g]pyrrolo[3,2-e]indole (II) was obtained in very good yield. However, when water was present in the reaction medium, a different derivative, 4-acetyl-2-hydroxy-2,5-diphenyl-3-(4′-acetyl-2′,5′-diphenyl-3′-yl)-2H-pyrrole (III) , was obtained as the main product. 2,2′,5,5′-Tetraphenyl-4,4′-diacetyl-3,3′-dipyrryl (IV) , a potentially useful intermediate for the synthesis of condensed pyrroles, was synthesized by zinc reduction of III. 相似文献
10.
Animesh Roy Maximilian A. Silvestri Robert A. Hall Salvatore D. Lepore 《Tetrahedron letters》2017,58(1):106-108
In the attempt to synthesize substituted allenyl esters through a metathesis coupling of unsubstituted allenyl esters and alkenes using a variety of ruthenium catalysts, it was discovered that allenyl esters themselves cleanly arrested the activity of the catalysts. Further studies suggests possible utility of allene esters as general quenching agents for metathesis reactions. To explore this idea, several representative olefin metathesis reactions, including ring closing, were successfully terminated by the addition of simple allenyl esters for more convenient purification. 相似文献