pini_2026

M. Pini, S. Severino, L. Mai, M. Ortolan, D. Mocci, L. Colaizzi, N. Kotsina, J. Nordmann, C. Brahms, J. C. Travers, M. Lucchini, R. Borrego-Varillas, F. Aleotti, A. Nenov, M. Reduzzi and M. Nisoli, “3-fs-resolved UV/XUV photoelectron spectroscopy in the gas phase”, Nat. Commun. 17, 9912 (2026)

Source record · Catalogue · Review register

DOI: 10.1038/s41467-026-76602-4

Source kind: measurement

Recorded technique: UV-pump, XUV-probe time-resolved photoelectron spectroscopy: tunable (230-330 nm) sub-3-fs UV pulses from resonant dispersive-wave emission in an argon- or neon-filled hollow capillary fibre, isolated attosecond XUV pulses (20-45 eV) from high-harmonic generation in xenon, a time-of-flight electron spectrometer. The instrument response is measured in situ by XUV-UV sideband cross-correlation in argon; the application is acetylacetone.

Materials in structured entries: None recorded.

Dataset quantities: None recorded.

Contents: 0 datasets; 0 formulas.

Curation notes

Pages are PDF pages (article 9912, pp. 1-9). Identity checked against the first page (Nature Communications (2026) 17:9912). No supplementary information in the library.

NOTHING TAKEN: the paper prints no two-photon number for Kr or Xe, or for any gas. Two-photon ionisation of noble gases as an in-situ characterisation is mentioned only by reference to andrade_2025 (Ref. 14, p. 2); here the instrument response is the cross-correlation of the first sideband (one XUV photon plus one UV photon) of argon photoelectrons: 3.2 +- 0.2 fs FWHM with UV pulses centred near 278 nm (4.45 eV), 200 nJ, ‘estimated peak intensity of 7 x 10^11 W cm^-2’, XUV filtered by 200 nm of Sn (pp. 2-3). The sideband intensity ‘scales as omega_UV^-4’ in the linear regime (Ref. 35), about 69 times weaker than at 800 nm for the same intensity (p. 3): a statement of scaling, not a cross section. Maximum UV peak intensity 1.1e13 W/cm^2 (neon-filled fibre, 3 fs, focal spot 90 x 95 um at 1/e^2; p. 7). The UV pulse energies against wavelength are in the Supplementary Information, not in the library.

FURTHER TWO-PHOTON DATA CITED: none with values (Ref. 35, M. Lucchini et al., Nat. Commun. 13, 7103 (2022), for the sideband scaling).

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

No datasets are recorded.

Formulas

No formulas are recorded.

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.