C. Callegari
14 Papers
169 Citations
C. Callegari is an academic researcher. The author has contributed to research in topics: Ionization & Excited state. The author has an hindex of 6, co-authored 14 publications.
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Papers
Imaging spectroscopy of rubidium atoms attached to helium nanodroplets
Lutz Fechner,B. Gruener,A. Sieg,C. Callegari,Francesco Ancilotto,Frank Stienkemeier,Marcel Mudrich +6 more
TL;DR: In this article, high-excited states of rubidium (Rb) atoms attached to helium (He) nanodroplets are studied by two-photon ionization spectroscopy in combination with electron and ion imaging.
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Penning ionization of doped helium nanodroplets following EUV excitation
D. Buchta,Sivarama Krishnan,Nils Benedict Brauer,Marcel Drabbels,M. DiFraia,C. Callegari,Robert Richter,Marcello Coreno,Kevin C. Prince,R. Moshammer,Marcel Mudrich +10 more
TL;DR: In this article, the effect of synchrotron radiation on the dopant atoms depending on their location inside the He droplets was studied using He-NOMA matrix.
39
EUV ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization and electron energy-loss spectra
D. Buchta,Sivarama Krishnan,Nils Benedict Brauer,Marcel Drabbels,Patrick O'Keeffe,M. Devetta,M. Di Fraia,C. Callegari,Robert Richter,Marcello Coreno,Kevin C. Prince,Frank Stienkemeier,R. Moshammer,Marcel Mudrich +13 more
TL;DR: In this paper, the ionization dynamics of pure He nanodroplets irradiated by EUV radiation was studied using Velocity-Map Imaging PhotoElectron-PhotoIon COincidence (VMI-PEPICO) spectroscopy.
35
CITIUS: an IR-XUV light source for fundamental and applied ultrafast science
C. Grazioli,C. Callegari,Alessandra Ciavardini,M. Coreno,Fabio Frassetto,D. Gauthier,D. Golob,R. Ivanov,Antti Kivimäki,Benoît Mahieu,Bojan Bucar,Miran Merhar,Paolo Miotti,Luca Poletto,E. Polo,Barbara Ressel,C. Spezzani,G. De Ninno +17 more
TL;DR: The CITIUS light source as mentioned in this paper is a new light source for ultrafast science, generating tunable, intense, femtosecond pulses in the spectral range from IR to XUV.
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Ultrafast relaxation of photoexcited superfluid He nanodroplets
Marcel Mudrich,Aaron LaForge,Frank Stienkemeier,Alessandra Ciavardini,Patrick O'Keeffe,M. Coreno,Y. Ovcharenko,Thomas Moeller,Michael Ziemkiewicz,M. Devetta,Paolo Piseri,Marcel Drabbels,Alexander Demidovich,C. Grazioli,P. Finetti,O. Plekan,M. Di Fraia,Kevin C. Prince,Robert Richter,C. Callegari,Jussi Eloranta,Alberto Hernando,Martí Pi,Manuel Barranco +23 more
TL;DR: In this paper, a void nanometer-sized bubble forms around the localized excitation (He*) within 1 ps. Subsequently, the bubble collapses and releases metastable He* at the droplet surface.