title: High-Resolution Rotational Spectrum, Dunham Coefficients, and Potential Energy Function of NaCl.
abstract: We report laboratory spectroscopy for the first time of theJ= 1-0 andJ= 2-1 lines of Na35Cl and Na37Cl in several vibrational states. The hyperfine structure has been resolved in both transitions for all vibrational levels, which permit us to predict with high accuracy the hyperfine splitting of the rotational transitions of the two isotopologues at higher frequencies. The new data have been merged with all previous works at microwave, millimeter, and infrared wavelengths and fitted to a series of mass-independent Dunham parameters and to a potential energy function. The obtained parameters have been used to compute a new dipole moment function, from which the dipole moment for infrared transitions up to Δv= 8 has been derived. Frequency and intensity predictions are provided for all rovibrational transitions up toJ= 150 andv= 8, from which the ALMA data of evolved stars can be modeled and interpreted.
authors.affiliation: Grupo de Espectroscopía Molecular, Edificio Quifima, Laboratorios de Espectroscopía y Bioespectroscopía, Unidad asociada CSIC, Parque científico Uva, Universidad de Valladolid, Paseo de Belén 5, E-47011, Valladolid, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Cabezas
authors.affiliation: Group of Molecular Astrophysics, ICMM, CSIC. C/Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Madrid, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Cernicharo
authors.affiliation: Group of Molecular Astrophysics, ICMM, CSIC. C/Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Madrid, Spain.
authors.forename: G
authors.initials: G
authors.lastname: Quintana-Lacaci
authors.affiliation: Grupo de Espectroscopía Molecular, Edificio Quifima, Laboratorios de Espectroscopía y Bioespectroscopía, Unidad asociada CSIC, Parque científico Uva, Universidad de Valladolid, Paseo de Belén 5, E-47011, Valladolid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Peña
authors.affiliation: Group of Molecular Astrophysics, ICMM, CSIC. C/Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Agundez
authors.affiliation: Group of Molecular Astrophysics, ICMM, CSIC. C/Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Madrid, Spain.
authors.forename: L Velilla
authors.initials: LV
authors.lastname: Prieto
authors.affiliation: Institut de Radioastronomie Millimétrique, 300 rue de la la Piscine, F-38406, Saint Martin d'Hères, France.
authors.forename: A
authors.initials: A
authors.lastname: Castro-Carrizo
authors.affiliation: Universidad de Murcia. Faculdad de Química, Dpto. de Química-Física, Campus Espinardo E-30100, Murcia, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Zuñiga
authors.affiliation: Universidad de Murcia. Faculdad de Química, Dpto. de Química-Física, Campus Espinardo E-30100, Murcia, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Bastida
authors.affiliation: Grupo de Espectroscopía Molecular, Edificio Quifima, Laboratorios de Espectroscopía y Bioespectroscopía, Unidad asociada CSIC, Parque científico Uva, Universidad de Valladolid, Paseo de Belén 5, E-47011, Valladolid, Spain.
authors.forename: J L
authors.initials: JL
authors.lastname: Alonso
authors.affiliation: Universidad de Murcia. Faculdad de Química, Dpto. de Química-Física, Campus Espinardo E-30100, Murcia, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Requena
keywords: astrochemistry; molecular data; molecular processes; radiative transfer; stars: AGB and post-AGB