peters_2019
===========

C\. J\. Peters, M\. N\. Shneider and R\. B\. Miles, "Kinetics model of femtosecond laser ionization in nitrogen and comparison to experiment", J\. Appl\. Phys\. 125, 243301 \(2019\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/peters_2019.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1063/1\.5098306 <https://doi.org/10.1063/1.5098306>`__

**Source kind:** theory

**Recorded technique:** A zero\-dimensional kinetics model of the plasma a focused femtosecond pulse leaves in nitrogen \(femtosecond laser electronic excitation tagging, FLEET\)\: 54 reactions \(Table I\) among ten species, electron\-impact rates from BOLSIG\+ \(version 03/2016\) with its standard N2 cross sections, fast gas heating, and an electron energy balance; initial N2\+ and electron densities from a PPT ionisation rate at a filament\-clamped intensity \(6\.5 x 10^17 W m^\-2, n\_e = 7\.2 x 10^16 cm^\-3 at 300 K and 101\.3 kPa\)\. Seven uncertain coefficients tuned by a random search \(240 000 trials\) to the time\-resolved first\- and second\-positive emission measured with a photomultiplier in a nitrogen free jet \(800 nm, 70 fs, 0\.5 mJ, f = 0\.3 m; pp\. 243301\-2 to \-9\)\.

**Materials in structured entries:** N2\+

**Dataset quantities:** dissociative\_recombination\_rate\_coefficient

**Contents:** 1 dataset; 0 formulas.

Curation notes
--------------

Identity checked on the article's first page \(PDF page 2 = p\. 243301\-1; PDF page 1 is a cover sheet\)\: Peters, Shneider and Miles, J\. Appl\. Phys\. 125, 243301 \(2019\)\. PDF page n = p\. 243301\-\(n \- 1\)\.

Curated\: the one dissociative recombination of a registered ion in Table I, R12, e\- \+ N2\+ \-\> 2N, not tuned and taken from refs\. 23 \(kossyi\_1992\) and 40 \(Popov 2001\)\: the same value and law as kossyi\_1992/dr\_N2\+\_N\_N\.

TUNED, NOT A PROPERTY \(notes only; Table I footnote a, Table IV, Sec\. III A, p\. 243301\-8\)\: the cluster\-ion recombinations R7\-R9, e\- \+ N4\+ \-\> N2\(A, B, C\) \+ N2, '2\.5 %, 87 % and 11 % x 2\.4 x 10^\-6 sqrt\(300/T\_e\)' cm^3 s^\-1\: a base coefficient drawn from 2\.6 x 10^\-7 to 5\.5 x 10^\-6 and split at random among the three product states, chosen to fit the emission; also tuned\: R5 \(energy pooling\), R23\-R25 \(quenching\)\. Table IV lists the literature ranges, e\.g\. 2\.6 x 10^\-7 \(ref\. 34\) to 4\.6 \+\- 0\.9 x 10^\-6 \(ref\. 37\) for N4\+\. Not registered, notes only\: R11, e\- \+ N3\+ \-\> N \+ N2, 2\.0 x 10^\-7 sqrt\(300/T\_e\) \(refs\. 23, 37\); R10, 2e\- \+ N4\+, 7 x 10^\-20 \(300/T\_e\)^4\.5 cm^6 s^\-1\. The model neglects e\- \+ N4\+ \-\> 2N2 in its ground state \(p\. 243301\-2\)\. Other reactions\: notes only \(plasma kinetics is outside optmat's scope except as data; TC\-954\)\.

The initial conditions are model assumptions\: only N2, N2\+ and electrons at the end of the pulse \('photoionization rather than photodissociation dominates', p\. 243301\-7\), and T\_e\(t0\) = 35 300 K from two photons in excess of the 11\-photon threshold, chosen 'to provide better agreement with experimental results'\.

Register\: TC\-977\.

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

Datasets
--------

peters\_2019/dr\_N2\+
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "dr_N2+",
     "material": "N2+",
     "file": "N2+/peters_2019__dr_N2+.csv",
     "table": "tbl_7c2f4f3bf473",
     "quantity": "dissociative_recombination_rate_coefficient",
     "unit": "cm3/s",
     "scale": 1e-07,
     "abscissa": "none",
     "use": "reproduced",
     "reproduced_from": [
       "kossyi_1992",
       "N. A. Popov, Plasma Phys. Rep. 27, 886 (2001)"
     ],
     "parameters": {
       "products": "N + N (states not given)",
       "law": "power_law",
       "reference_temperature_k": 300.0,
       "exponent": 0.5
     }
   }

Table I \(p\. 243301\-3\), R12^b\: 'e\- \+ N2\+ \-\> 2N \+ epsilon\_tr', 2\.8 x 10^\-7 sqrt\(300/T\_e\) cm^3 s^\-1, refs\. 23 and 40; footnote b, it contributes to fast gas heating\. Not tuned\.

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 </register>` for the checks and decisions.