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IST-Lisbon databaseclick to expand or collapse

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Data Group [CO_anis]: Vialetto L, Ben Moussa A, van Dijk J, Longo S, Diomede P, Guerra V and Alves L L "Effect of anisotropic scattering for rotational collisions on electron transport parameters in CO" 2021 Plasma Sources Sci. Technol. 30 075001.
The set includes 15 cross sections defined up to 1 keV, and it was compiled from Biagi S by extracting the data from Magboltz v11.10. Superelastic vibrational deexcitations should be considered as part of the set, adopting a Boltzmann distribution at gas temperature (e.g. 300K or 77K) for the v=0-6 vibrational states. NOTE ABOUT BIAGI DATA: Biagi’s cross sections extracted from Magboltz v11.10 were updated after the publication of the present dataset: (i) at low energy, the main improvement was the use of M Allan’s vibrational resonance measurements; (ii) at high energy, multiple changes were introduced, for both single dipole excitations and dissociative ionization.
When this complete set is used in a two-term Boltzmann solver (choosing a linear interpolation scheme), it yields calculated swarm parameters in good agreement with measurements for E/N values between 5 and 100 Td. For E/N < 5 Td, the set must be further completed to include rotational excitation mechanisms (see below), in order to reproduce measured swarm data.
IMPORTANT NOTICE ABOUT ROTATIONAL TRANSITIONS
This set is to be completed with the following rotational cross sections: (i) dipole integral cross sections for transitions CO(X,v=0,J) --> CO(X,v=0,J+1) (J=0,1, … ,25), available in this database under group CO_dipint-rot (see the corresponding description for more details); (ii) dipole momentum-transfer cross sections for transitions CO(X,v=0,J) --> CO(X,v=0,J+1) (J=0,1, … ,25), available in this database under group CO_dipmt-rot (see the corresponding description for more details); (iii) quadrupole integral cross sections for transitions CO(X,v=0,J) --> CO(X,v=0,J+2) (J=0,2, … ,24), available in this database under group CO_quadint-rot (see the corresponding description for more details).
When the full cross section set for CO (containing momentum-transfer, electronic and vibrational excitations, ionization and attachment from ground-state) and the different CO_xxx-rot (including the rotational excitation / deexcitation to/from the CO(J=0), CO(J=1),., CO(J=26) states) are used in a two-term Boltzmann solver they yield swarm parameters that agree with measurements within 1%-2%, especially in the range 0.1 < E/N < 1 Td when including also quadrupole cross sections.

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Data Group [CO_dipint-rot]: Vialetto L, Ben Moussa A, van Dijk J, Longo S, Diomede P, Guerra V and Alves L L "Effect of anisotropic scattering for rotational collisions on electron transport parameters in CO" 2021 Plasma Sources Sci. Technol. 30 075001.
CO_dipint-rot is a set of dipole-integral cross sections for rotational excitation by electron impact, for transitions CO(X,v=0,J) --> CO(X,v=0,J+1) (J=0,1, … ,25), which complements the COMPLETE set of CO cross sections, available in this database under group CO_anis. The integral cross sections were calculated from the corresponding differential ones described by the Born approximation combined with the point-dipole interaction, as proposed by Itikawa Y "Cross Sections for Electron Collisions with Carbon Monoxide" 2015 J. Phys. Chem. Ref. Data 44 013105 in the low-energy region. This set of cross sections should be used together with the dipole momentum-transfer cross sections and the quadrupole integral cross sections for rotational transitions, available in this database under groups CO_dipmt-rot and CO_quadint-rot, respectively.
Calculations using these cross sections should include inelastic-stepwise and superelastic transitions between rotational states CO(J=0), CO(J=1), … , CO(J=26), assuming a Boltzmann distribution for their populations: n_J/N = (g_J/P_rot) exp[-E_J/(k_B T_g)] with P_rot = Sum_(J=0)^26 g_J exp[-E_J/(k_B T_g)]. At T_g=300K, these populations are n_0/N=9.20E-03 n_1/N=2.71E-02 n_2/N=4.35E-02 n_3/N=5.77E-02 n_4/N=6.89E-02 n_5/N=7.68E-02 n_6/N=8.12E-02 n_7/N=8.24E-02 n_8/N=8.06E-02 n_9/N=7.63E-02 n_10/N=7.01E-02 n_11/N=6.27E-02 n_12/N=5.46E-02 n_13/N=4.64E-02 n_14/N=3.85E-02 n_15/N=3.12E-02 n_16/N=2.47E-02 n_17/N=1.92E-02 n_18/N=1.45E-02 n_19/N=1.08E-02 n_20/N=7.85E-03 n_21/N=5.59E-03 n_22/N=3.90E-03 n_23/N=2.66E-03 n_24/N=1.78E-03 n_25/N=1.17E-03 n_26/N=7.53E-04.

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Data Group [CO_quadint-rot]: Vialetto L, Ben Moussa A, van Dijk J, Longo S, Diomede P, Guerra V and Alves L L "Effect of anisotropic scattering for rotational collisions on electron transport parameters in CO" 2021 Plasma Sources Sci. Technol. 30 075001.
CO_quadint-rot is a set of quadrupole-integral cross sections for rotational excitation by electron impact, for transitions CO(X,v=0,J) --> CO(X,v=0,J+2) (J=0,2, … ,24), which complements the COMPLETE set of CO cross sections, available in this database under group CO_anis. The quadrupole cross sections were calculated (i) below 1 eV, assuming isotropic scattering described by the Born approximation, as proposed by Gerjuoy E and Stein S "Rotational Excitation by Slow Electrons" 1955 Phys. Rev. 97 1671; (ii) above 1 eV, assuming a decay of 1/u. This set of cross sections should be used together with the dipole integral and momentum-transfer cross sections for rotational transitions, available in this database under groups CO_dipint-rot and CO_dipmt-rot, respectively.
Calculations using these cross sections should include inelastic-stepwise and superelastic transitions between rotational states CO(J=0), CO(J=1), … , CO(J=26), assuming a Boltzmann distribution for their populations: n_J/N = (g_J/P_rot) exp[-E_J/(k_B T_g)] with P_rot = Sum_(J=0)^26 g_J exp[-E_J/(k_B T_g)]. At T_g=300K, these populations are n_0/N=9.20E-03 n_1/N=2.71E-02 n_2/N=4.35E-02 n_3/N=5.77E-02 n_4/N=6.89E-02 n_5/N=7.68E-02 n_6/N=8.12E-02 n_7/N=8.24E-02 n_8/N=8.06E-02 n_9/N=7.63E-02 n_10/N=7.01E-02 n_11/N=6.27E-02 n_12/N=5.46E-02 n_13/N=4.64E-02 n_14/N=3.85E-02 n_15/N=3.12E-02 n_16/N=2.47E-02 n_17/N=1.92E-02 n_18/N=1.45E-02 n_19/N=1.08E-02 n_20/N=7.85E-03 n_21/N=5.59E-03 n_22/N=3.90E-03 n_23/N=2.66E-03 n_24/N=1.78E-03 n_25/N=1.17E-03 n_26/N=7.53E-04.

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Data Group [CO_dipmt-rot]: Vialetto L, Ben Moussa A, van Dijk J, Longo S, Diomede P, Guerra V and Alves L L "Effect of anisotropic scattering for rotational collisions on electron transport parameters in CO" 2021 Plasma Sources Sci. Technol. 30 075001.
CO_dipmt-rot is a set of dipole-momentum-transfer cross sections for rotational excitation by electron impact, for transitions CO(X,v=0,J) --> CO(X,v=0,J+1) (J=0,1, … ,25), which complements the COMPLETE set of CO cross sections, available in this database under group CO_anis. The momentum-transfer cross sections were calculated from the corresponding differential ones described by the Born approximation combined with the point-dipole interaction, as proposed by Itikawa Y "Cross Sections for Electron Collisions with Carbon Monoxide" 2015 J. Phys. Chem. Ref. Data 44 013105 in the low-energy region. This set of cross sections should be used together with the dipole integral cross sections and the quadrupole integral cross sections for rotational transitions, available in this database under groups CO_dipint-rot and CO_quadint-rot, respectively.
Calculations using these cross sections should include inelastic-stepwise and superelastic transitions between rotational states CO(J=0), CO(J=1), … , CO(J=26), assuming a Boltzmann distribution for their populations: n_J/N = (g_J/P_rot) exp[-E_J/(k_B T_g)] with P_rot = Sum_(J=0)^26 g_J exp[-E_J/(k_B T_g)]. At T_g=300K, these populations are n_0/N=9.20E-03 n_1/N=2.71E-02 n_2/N=4.35E-02 n_3/N=5.77E-02 n_4/N=6.89E-02 n_5/N=7.68E-02 n_6/N=8.12E-02 n_7/N=8.24E-02 n_8/N=8.06E-02 n_9/N=7.63E-02 n_10/N=7.01E-02 n_11/N=6.27E-02 n_12/N=5.46E-02 n_13/N=4.64E-02 n_14/N=3.85E-02 n_15/N=3.12E-02 n_16/N=2.47E-02 n_17/N=1.92E-02 n_18/N=1.45E-02 n_19/N=1.08E-02 n_20/N=7.85E-03 n_21/N=5.59E-03 n_22/N=3.90E-03 n_23/N=2.66E-03 n_24/N=1.78E-03 n_25/N=1.17E-03 n_26/N=7.53E-04.

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