wang_2019

R. Wang, S.-W. Zhang, Y. Liu, T. Sun, H. Lv and H.-F. Xu, “Effect of laser polarization on strong-field ionization and fragmentation of nitrous oxide molecules”, Chin. Phys. B 28, 053301 (2019)

Source record · Catalogue · Review register

DOI: 10.1088/1674-1056/28/5/053301

Source kind: measurement

Recorded technique: Linear Wiley-McLaren time-of-flight mass spectrometry of N2O (effusive, leak valve; chamber below 1e-5 Pa) in 800 nm, 50 fs, 1 kHz pulses (Ti:sapphire, up to 4 mJ) focused by a 25 cm lens; intensity set by a half-wave plate and Glan prism, ellipticity by a quarter-wave plate; dual microchannel plates, 5000 shots per spectrum; a 0.5 mm slit at the end of the flight tube for the angular distributions (p. 053301-2).

Materials in structured entries: None recorded.

Dataset quantities: None recorded.

Contents: 0 datasets; 0 formulas.

Curation notes

PDF page 1 is IOP’s cover; pdf pages 2-7 = article pages 053301-1 to -6. Identity checked on pdf page 2 (title, authors, Chin. Phys. B 28 053301, DOI).

WHY NO DATASETS (TC-969). The yields are in figures only, all vector drawings: Fig. 1, the yields of N2O+ and the fragment ions (NO+, N2+, O^n+, N^m+) against intensity, 2.0 x 10^13 to 3.6 x 10^14 W/cm2, linear; Fig. 2, the LP and CP mass spectra at 2 x 10^14 W/cm2; Fig. 3, each fragment’s yield over N2O+ against ellipticity at 1.4 x 10^14 W/cm2, normalised to linear polarisation; Fig. 4, the widths of those curves against intensity; Fig. 5, the angular distributions. The intensity calibration is not stated. The numbers in the text fit no quantity: - Appearance intensities (p. 053301-2): the doubly charged O^2+ and N^2+ ‘begin to appear at a stronger laser intensity of 7.0 x 10^13 W/cm2, and N3+ ions are not detectable until the laser intensity reaches 1.2 x 10^14 W/cm2’ (N^3+), the singly charged fragments at ‘a relatively low laser intensity’ (no number). There is no quantity for the intensity at which an ion first appears (reported). - Ellipticity (p. 053301-3): ‘the ratio of singly-charged fragment ions in the CP laser fields is about 15%-25% of that in the LP laser fields’, the ratio being each fragment’s yield over N2O+ at 1.4 x 10^14 W/cm2 (Fig. 3); N3+ falls to zero at an ellipticity of 0.3. A ratio of two branching ratios (CP over LP), whose LP and CP values themselves are not printed. - No N2O2+ or higher parent ions are observed, which the paper attributes to their short lifetime, ‘for instance, the lifetime of the metastable state of N2O2+ is only 660 +- 70 ns’ (p. 053301-2, quoted from their Ref. 32, not in the library; not taken). - Quoted ionisation potentials: N2O 12.889 eV, Xe 12.13 eV (p. 053301-3).

FINDINGS STATED: the highly charged fragments come mainly from multiply charged parents formed by recollision (non-sequential) ionisation, their ellipticity dependence following the three-step model (for N3+); NO+ and O^n+ peak along the polarisation, N^m+ also perpendicular (central and terminal N; as Graham et al. with 15N14N16O).

FIGURES FOR LATER (TC-969; vector): Fig. 1 (yields against intensity) and Fig. 3 (fragment/N2O+ against ellipticity).

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.