Catalogs

  • The Collision Database (C. Vastel, 5 October 2017)
  • The aim of this database is to provide the community the most up-to-date database on the collisional coefficients to be used with the RADEX radiative transfer modelling. To date there are two updated collision databases: The LAMDA database maintained by F. van der Tak at the Leiden University (Netherlands) and the Basecol database maintained by M.-L. Dubernet at the Paris observatory (France). The LAMDA database has the advantage to provide collision files directly used with the RADEX tool. The Basecol database does not generate files directly used with this tool. RADEX is implemented within the CASSIS software and CASSIS needs to adress the quantum numbers associated with the molecular/atomic transitions to perform line identification and generate synthetic spectra for example. With this project I am trying to gather the most up-to-date collision files provided by LAMDA, BASECOL, and by the scientists feeding the databases (e.g. F. Lique, A. Faure). I then made those files compatible with their associated molecular database (JPL and/or CDMS) so that the quantum numbers, Einstein coefficients, upper energy levels and rest frequencies match. Indeed, some species may have less quantum numbers from database to another. Currently the database contains data for 76 molecular species. Several isotopomers and deuterated versions are also available. Work is currently underway to add more datafiles. We encourage comments from the users in order to improve and extend the database. Here is below the proposed collision files to be used in CASSIS. You can download the files of interest and, when using the LTE-RADEX modelling within CASSIS, select your file using Ctrl + left click under the "Collision" tab. Note that they are not the default one within CASSIS. They should be implemented in the next version. For the moment the list of the collision files implemented in CASSIS can be found here.
CASSIS TAGSSpeciesCollision File CollidersReferencesNotesCaveats
15501NHnh-He-scaled.datHe scaled (*1.3335)Lique et al., to be publishedProvided by F. Lique (7 dec 2016)T=[5-150] K
15001NHnh-He-scaled.datHe scaled (*1.3335)Lique et al., to be publishedProvided by F. Lique (7 dec 2016)T=[5-150] K
16502NDnd-He-scaled.datHe scaled (*1.3335)ND-He rates from Dumouchel et al. (2012), unpublishedProvided by F. Lique (7 dec 2016), modified by CV 23 Aug 2017T=[5-150] K
17001OHoh-o-p-h2.datortho and para H2OH o-H2 and pH2 from Offer et al. (1994) + Offer priv. comm.Constructed by CV based on LAMDA, 4 Oct 2017T=[15-200] K
17082p-NH3p-nh3-ph2.datpara H2Danby et al 1988, MNRAS 235, 229From LAMDA, 25 Aug 2017T=[15-300] K
17092o-NH3p-nh3-ph2.datpara H2Danby et al 1988, MNRAS 235, 229From LAMDA, 25 Aug 2017T=[15-300] K
18083p-H2Oph2o-o-p-h2-jpl.datortho and para H2pH2O - pH2 and pH2O - oH2 from Daniel et al. (2011), assuming thermal o/p for H2From LAMDA, 23 Aug 2017T=[5-1500] K
18093o-H2Ooh2o-o-p-h2-jpl.datortho and para H2oH2O - pH2 and oH2O - oH2 from Daniel et al. (2011), assuming thermal o/p for H2From LAMDA, 23 Aug 2017T=[5-1500] K
18581p-NH2Dp-nh2d-o-p-h2.datortho and para H2oH2 and thermalized pH2 from Daniel et al (2014): oH2 is assumed similar to pH2 (j2 = 2)constructed by CV from LAMDA, 25 Aug 2017T=[5-300] K CV corrects the IDs for o and p H2 in the LAMDA file. Confirmation asked to Floris (and received) on August 25th, 2017
18591o-NH2Do-nh2d-o-p-h2.datortho and para H2oH2 and thermalized pH2 from Daniel et al (2014): oH2 is assumed similar to pH2 (j2 = 2)constructed by CV from LAMDA, 25 Aug 2017T=[5-300] K CV corrects the IDs for o and p H2 in the LAMDA file. Confirmation asked to Floris (and received) on August 25th, 2017
19002HDOhdo-o-p-h2-jpl.datortho and para H2Faure et al. (2012)From LAMDA, 23 Aug 2017T=[5-300] K
25001CCHc2h-He-scaled-e.datHe scaled (*1.36) and eSpielfiedel et al (2012), scaled by 1.36 from their rates with HeFrom LAMDA, 23 Aug 2017T=[5-100] K
25501CCHc2h-He-scaled-e.datHe scaled (*1.36) and eSpielfiedel et al (2012), scaled by 1.36 from their rates with HeFrom LAMDA, 23 Aug 2017T=[5-100] K
27501HCNhcn-He-scaled-cdms.datHe scaled (*1.363)Dumouchel et al. (2010)From LAMDAT=[5-500] K no HFS
27501HCNhcn-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 19th, 2017 based on Basecol fileT=[5-100] K no HFS
27601HCNhcn-hfs-He-scaled-cdms.datHe scaled (*1.363)Green & Thaddeus (1974) + extrapolationfrom LAMDA, May 2nd, 2017T=[5-1200] K HFS
27502HNChnc-opH2-cdms.datortho and para H2Dumouchel, Klos & Lique Phys. Chem. Chem. Phys., 2011, 13, 8204-8212constructed by CV April 10th, 2017 based on files given by F. Dumouchel. Valid for CDMS databaseT=[5-100] K
27502HNChnc-He-scaled-cdms.datHe scaled (*1.363)Dumouchel et al. (2010)From LamdaT=[5-500] K
28001COco-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 22, 2017T=[2-3000] K
28001COco_high_j.datortho and para H2from Yang et al (2010) extrapolated by David Neufeld (13dec2010)from LAMDA, Aug 22, 2017T=[2-3000] K For High J transitions (J=80)
28503COco-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 22, 2017T=[2-3000] K
28503COco_high_j.datortho and para H2from Yang et al (2010) extrapolated by David Neufeld (13dec2010)from LAMDA, Aug 22, 2017T=[2-3000] K For High J transitions (J=80)
28515HN13Chn13c-He-scaled-cdms.datHe scaled (*1.363)Dumouchel et al. (2010)Constructed by CV May 2nd 2017, using Lamda.T=[5-500] K
28515HN13Chn13c-opH2-cdms.datortho and para H2Dumouchel, Klos & Lique Phys. Chem. Chem. Phys., 2011, 13, 8204-8212Constructed by CV May 3nd 2017, based on HNC files given by F. Dumouchel. Valid for CDMS databaseT=[5-100] K
28501H13CNh13cn-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 26th, 2017 based on HCN fileT=[5-100] K
28601H13CNh13cn-hfs-He-scaled-cdms.datHe scaled (*1.363)Green & Thaddeus (1974) + extrapolationconstructed by CV May 2nd, 2017 based on HCN HFS file from LAMDAT=[5-1200] K HFS
28506HC15Nhc15n-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 26th, 2017 based on HCN fileT=[5-100] K
28508DNCdnc-opH2-cdms.datortho and para H2Dumouchel, Klos & Lique Phys. Chem. Chem. Phys., 2011, 13, 8204-8212constructed by CV April 19th, 2017 based on HNC files given by F. Dumouchel. Valid for CDMS databaseT=[5-100] K
28508DNCdnc-He-scaled-cdms.datHe scaled (*1.363)Dumouchel et al. (2010)constructed by CV April 19th, 2017 based on HNC fileT=[5-500] K no HFS
28509DCNdcn-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 26th, 2017 based on HCN fileT=[5-100] K
2900113CO13co-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 23, 2017T=[2-3000] K
29002HCO+hcop-h2-jpl.datH2Yazidi et al. MNRAS 441, 664-670 (2014)Given by F. Lique adapted to match the JPL spectroscopyT=[10-490] K
29006C17Oc17o-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 23, 2017T=[2-3000] K JPL only, as CDMS has HFS which LAMDA does not have
2950113CO13co-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 23, 2017T=[2-3000] K
29507HCO+hcop-h2-cdms.datH2Yazidi et al. MNRAS 441, 664-670 (2014)Given by F. Lique, adapted to match the CDMS spectroscopyT=[10-490] K
29507HCO+hcop-xpol-h2-cdms.datH2Flower (1999) + extrapolation 10-2000KFrom LamdaT=[10-2000] K The Einstein coeff, frequencies and energy levels are different from JPL or CDMS
29510D13CNd13cn-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 26th, 2017 based on HCN fileT=[5-100] K
29511DC15Ndc15n-pH2-cdms.datpara H2Hernandez-Vera et al., J. Chem. Phys. vol140, 22, 2014constructed by CV April 26th, 2017 based on HCN fileT=[5-100] K
29511DC15Ndc15n-He-scaled-cdms.datHe scaled (*1.363)Dumouchel et al. (2010)constructed by EMT=[5-500] K
30001C18Oc18o-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 23, 2017T=[2-3000] K
30502C18Oc18o-o-p-H2.datortho and para H2Yang et al. (2010)from LAMDA, Aug 23, 2017T=[2-3000] K
30504H13CO+h13cop-h2-cdms.datH2Yazidi et al. MNRAS 441, 664-670 (2014)constructed by CV April 26th, 2017 based on HCO+ fileT=[10-490] K
30504H13CO+h13cop-xpol-h2-cdms.datH2Flower (1999) + extrapolation 10-2000Kconstructed by CV April 26th, 2017 based on HCO+ fileT=[10-2000] K
30505HC17O+hc17op-h2-cdms.datH2Flower (1999) + extrapolation 10-2000Kfrom LAMDA, Aug 23, 2017T=[10-2000] K
30510DCO+dcop-h2-cdms.datH2Flower (1999) + extrapolation 10-2000Kfrom LAMDA, Aug 23, 2017T=[10-2000] K
30581p-H2COph2co-h2-cdms.datortho and para H2Wiesenfeld & Faure MNRAS (2013)from LAMDA, Aug 24, 2017T=[10-300] K
30591o-H2COoh2co-h2-cdms.datortho and para H2Wiesenfeld & Faure MNRAS (2013)from LAMDA, Aug 24, 2017T=[10-300] K
31506HC18O+hc18op-h2-cdms.datH2Flower (1999) + extrapolation 10-2000Kfrom LAMDA, Aug 23, 2017T=[10-2000] K
31508D13CO+d13cop-h2-cdms.datH2Flower (1999) + extrapolation 10-2000Kconstructed by CV Aug 23 2017 based on HCO+ fileT=[10-2000] K
32001O2o2-h2-jpl.datH2Lique et al. 2014Provided by F. Lique (7 dec 2016)T=[5-150] K
32083e-CH3OHe-ch3oh-ph2.datpara H2Rabli & Flower (2010)constructed by CV from LAMDA, Aug 24, 2017T=[10-200] K
32093a-CH3OHa-ch3oh-ph2.datpara H2Rabli & Flower (2010)constructed by CV from LAMDA, Aug 24, 2017T=[10-200] K
32508O2o2-h2-cdms.datH2Lique et al. 2014Provided by F. Lique (7 dec 2016)T=[5-150] K
34082p-H2Sph2s-o-p-h2.datortho and para H2p-H2S - oH2 and pH2 scaled from H2O-H2 (Daniel/Dubernet et al 2012)from LAMDA, Aug 23, 2017T=[5-1500]
34092o-H2Soh2s-o-p-h2.datortho and para H2oH2O - pH2 from Dubernet et al (2009) and oH2O - oH2 from Daniel et al. (2011), assuming thermal o/p for H2, scaled to oH2Sfrom LAMDA, Aug 23, 2017T=[5-1500]
38082p-c-C3H2p-c3h2-h2-jpl.datH2Chandra & Kegel (2000)from LAMDA, Aug 23, 2017T=[30-120] The Einstein A coefficients have been re-scaled using a dipole moment of 3.27 D
38092o-c-C3H2o-c3h2-h2-jpl.datH2Chandra & Kegel (2000)from LAMDA, Aug 23, 2017T=[30-120] The Einstein A coefficients have been re-scaled using a dipole moment of 3.27 D
38582p-c-C3H2p-c3h2-h2-cdms.datH2Chandra & Kegel (2000)from LAMDA, Aug 23, 2017T=[30-120] The Einstein A coefficients have been re-scaled using a dipole moment of 3.27 D
38592o-c-C3H2o-c3h2-h2-cdms.datH2Chandra & Kegel (2000)from LAMDA, Aug 23, 2017T=[30-120] The Einstein A coefficients have been re-scaled using a dipole moment of 3.27 D
41001CH3CNch3cn-h2-jpl.datH2S. Green 1986, ApJ 309, 331constructed by CV from LAMDA, Aug 24, 2017T=[20-500] K
41505CH3CNch3cn-h2-cdms.datH2S. Green 1986, ApJ 309, 331constructed by CV from LAMDA, Aug 24, 2017T=[20-500] K to be tested with the new database. Update on nov 2016 with 3 quantum number instead of 2
43511HNCOhnco-h2.datThe file says He however collision partner ID=1 which corresponds to H2Green, S. 1986, NASA Technical Memorandum 87791constructed by CV from LAMDA, Aug 24, 2017T=[20-320] K
44001CScs-He-scaled-jpl.datHe scaled (*1.363)Lique et al (2006)from LAMDA, Aug 23, 2017T=[10-300] K
44501CScs-He-scaled-cdms.datHe scaled (*1.363)Lique et al (2006)constructed by CV on Aug 23, 2017, based on LAMDA fileT=[10-300] K
44505SiOsio-He-scaled.datHe scaled (*1.38)Dayou & Balanca (2006) + extrapolationconstructed by CV from LAMDA, Aug 24, 2017T=[10-2000] K
4550429SiO29sio-He-scaled.datHe scaled (*1.38)Dayou & Balanca (2006) + extrapolationconstructed by CV from LAMDA, Aug 24, 2017T=[10-2000] K
45506HCS+hcsp-h2.datH2adopting HCO+ - H2 from Flower (1999) + extrapolationfrom LAMDA, Aug 24, 2017T=[10-2000] K
48001SOso-He-scaled.datHe scaled (*1.363)Lique et al (2006)from LAMDA, Aug 23, 2017T=[60-300] K
48001SOso-pH2.datpara H2Lique et al (2007)constructed by CV from BASECOL, Aug 23, 2017T=[5-50] K
48501SOso-He-scaled.datHe scaled (*1.363)Lique et al (2006)from LAMDA, Aug 23, 2017T=[60-300] K
48501SOso-pH2.datpara H2Lique et al (2007)constructed by CV from BASECOL, Aug 23, 2017T=[5-50] K
51501HC3Nhc3n-oph2-cdms.datortho and para H2Faure et al. 2016 MNRAS 460 2103Given by A. FaureT=[10-300] K
60001OCSocs-H2.datH2Green & Chapman 1978 + extrapolationfrom LAMDA, Aug 23, 2017T=[10-500] K
60503OCSocs-H2.datH2Green & Chapman 1978 + extrapolationfrom LAMDA, Aug 23, 2017T=[10-500] K
64502SO2so2-He-scaled.datHe scaled (*1.39)Green 1995 + extrapolation from Schoier al. (2005)from LAMDA, Aug 23, 2017T=[10-375] K
64502SO2so2-o-p-H2.datortho and para H2Cernicharo et al. 2011constructed by CV from BASECOL, Aug 23, 2017T=[5-30] K