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 `__ · :doc:`Catalogue ` · :doc:`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 :doc:`review register ` for the checks and decisions.