New experimental and theoretical investigations about the molecular ion N2+

• Grant number: 23/08074-5
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2024
• End date: March 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal Investigator: Jayr de Amorim Filho
• Grantee: Laiz Rodrigues Ventura
• Host Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil

Abstract

The N2+ molecular ion is of great importance for the knowledge of reaction mechanisms in the upper part of the Earth's atmosphere and for this reason its spectra have been extensively studied. Optical diagnostics and radiative modeling require spectroscopic accuracy of data (wavenumbers, molecular constants, transition probabilities) to perform the characterization of arc jets and radiofrequency or microwave plasma torches and also to predict air radiation, for example, in the reentry of space vehicles into the Earth's atmosphere. However, even with the first spectra of this ion having been produced in 1932, there is still a lack of information about it. This is mainly due to the fact that the spectra of the present molecule present perturbations which make it difficult to obtain precise spectroscopic constants. In this project, we propose an investigation of the N_2^+ molecule. We will produce the spectra of this molecule and then we will improve the spectroscopic constants of this cation. We will carry out the characterization of the used discharge and later we will carry out the treatment of the existing disturbances in the spectra.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VENTURA, LAIZ R.; DA SILVA, RAMON S.; AMORIM, JAYR; FELLOWS, CARLOS E.. New look at perturbations in the N₂(C³ 3Πu, υ) electronic state. Indirect predissociation through states C''Π_u and1 Σ_u+ states. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, v. 336, p. 9-pg., 2025-08-05. (23/08074-5)

VENTURA, LAIZ R.; SANTOS, ALEXANDRE E.; AMORIM, JAYR; FELLOWS, CARLOS E.. New analysis of the (A)over-tilde² Π_u - (X)over-tilde² Π_g electronic transition of the ¹²C¹⁶O₂⁺ molecule: Improved molecular constants and Renner-Teller parameters. Chemical Physics Letters, v. 849, p. 7-pg., 2024-06-18. (23/08074-5)

VENTURA, LAIZ R.; DA SILVA, RAMON S.; FELLOWS, CARLOS E.; AMORIM, JAYR. The role of spin-orbit perturbations in the rovibrational structure of the N₂(C³Π_u, v) electronic state. Importance in N(⁴S) and N(²D) formation in Lewis-Rayleigh afterglows. PHYSICA SCRIPTA, v. 100, n. 3, p. 8-pg., 2025-03-01. (23/08074-5)