NO(<i>B</i> 2Π) radiative lifetimes: <i>v</i>=0–6

Gadd, G. E.; Slanger, T. G.

doi:10.1063/1.458011

Cited by 53 publications

(34 citation statements)

References 29 publications

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“…In Fig. 4, interaction potentials of NO electronic states are constructed in this work from the known spectroscopic constants [4,13], but those of the NO a 4 r and b 4 states are taken from the works of Scheingraber and Vidal [26] and Gadd and Slanger [33]. The energy level of the C 2 r v 0 is located very close to the dissociation limit [26,28,[31][32][33]35,37,38] of the X 2 r .…”

Section: A Literature Surveymentioning

confidence: 99%

“…Many studies [5,24,25,[27][28][29][30][31][32][33][34][35] have been performed to understand populations of NO electronic states in recombination reaction of N and O atoms. For the recombination reaction of N and O atoms, excitations of NO electronic states and their generally accepted transitions [5,24,25,[27][28][29][30][33][34][35] can be summarized as follows.…”

Section: A Literature Surveymentioning

confidence: 99%

“…For the recombination reaction of N and O atoms, excitations of NO electronic states and their generally accepted transitions [5,24,25,[27][28][29][30][33][34][35] can be summarized as follows.…”

Section: A Literature Surveymentioning

confidence: 99%

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Rate Parameters for Electronic Excitation of Diatomic Molecules: NO Radiation

Hyun

Park

Chang

2009

Journal of Thermophysics and Heat Transfer

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This is one of an ongoing series of papers on collisional excitation of electronic states in N 2 , O 2 , NO, CO, CN, and N 2 . In this paper, NO radiation observed in the test section of an arcjet wind tunnel is studied. In the experiments, NO and were seen, was not seen, and " was seen to be very weak. NO radiation is calculated with the use of the code SPRADIAN07 to explain the measured spectra. It was found that inverse predissociation is mainly responsible for the population of the NO C 2 r state during recombination of N and O atoms. The population of the NO A 2 state is mostly due to the radiative decay from the NO C 2 r state. The NO D 2 state is excited from the C 2 r state by collisions. The NO B 2 r state is populated by complicated collisional transition paths by passing through the intermediate states a 4 r and b 4 . These interpretations at least qualitatively explain the experimental data. Electronic excitation temperature is only remotely related to electron temperature. Nomenclature A = electronic state of the NO molecule, A 2 A h = excitation rate parameter, cm 3 =s A r = radiative transition probability, s 1 a = electronic state of the NO molecule, a 4 B = electronic state of the NO molecule, B 2 r b = electronic state of the NO molecule, b 4 C = electronic state of the NO molecule, C 2 r D = electronic state of the NO molecule, D 2 E = electronic term energy, cm 1 ; energy, cm 1 g = statistical weight (multiplicity, degeneracy) h = Plank constant, 6:6261 10 34 J s I = total band intensity, W=cm 3 I = specific intensity, W=cm 2 m sr i = electronic state i of the NO molecule J = rotational quantum number; rotational state j = electronic state j of the NO molecule K e = excitation rate by electron collision, cm 3 =s K h= excitation rate by heavy-particle collision, cm 3 =s K ivpr = rate coefficient for inverse predissociation, cm 3 =s K prd = rate coefficient for predissociation, s 1 k B = Boltzmann constant, 1:3807 10 23 J=K k = absorption coefficient, cm 1 M = colliding heavy particle or electron m = mass, g=mol n = number density, cm 3 ; excitation rate parameter, Eq. (10) p = pressure, atm Q = partition function S = spin angular momentum quantum number S J 0 0 J 00 00 = rotational line strength factor (Hönl-London factor) s = distance along a ray, cm T = heavy-particle translational temperature, K T d = activation temperature, K T e = electron temperature, K T ex = electronic excitation temperature, K T r = heavy-particle rotational temperature, K T v = vibrational temperature, K t = time, s v = vibrational quantum number, vibrational state X = ground electronic state of the NO molecule, X 2 r x = distance from the nozzle exit = NO B 2 r X 2 r transition = NO A 2 X 2 r transition = NO C 2 r X 2 r transition K = Kronecker delta " = NO D 2 X 2 r transition " = emission coefficient, W=cm 2 m sr = nonequilibrium factor = wavelength, Å or nm = orbital angular momentum quantum number about the internuclear axis = frequency, Hz = cross section, cm 2 = total mole fraction Subscripts A = electronic sta...

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Section: A Literature Surveymentioning

confidence: 99%

Section: A Literature Surveymentioning

confidence: 99%

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Rate Parameters for Electronic Excitation of Diatomic Molecules: NO Radiation

Hyun

Park

Chang

2009

Journal of Thermophysics and Heat Transfer

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“…The first dissociation limit of NO lies near the v ¼ 7 vibrational level of the B 2 P state and other doublet and quartet states, such as A 2 R, C 2 P, D 2 R, and a 4 P state, lie in the same energy region as the B 2 P state. Dissociation dynamics and interaction between these doublet and quartet states have been extensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Laser-induced fluorescence excitation spectra due to the transition of NO in magnetic fields up to 10T

Takazawa

2004

Journal of Molecular Spectroscopy

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“…[4][5][6][7][8] The A 2 ⌺ ϩ -X 2 ⌸, B 2 ⌸ -X 2 ⌸, and C 2 ⌸ -X 2 ⌸ bands known, respectively, as the ␥, ␤, and ␦ systems, are strong in both emission and absorption, and investigations go back at least 70 years. The emission systems are seen in aurora, in the upper atmospheres of both the earth 9,10 and Venus, 11 in atmospheric re-entry, in arc jets, 12 and in laboratory afterglows.…”

Section: Introductionmentioning

confidence: 99%

The NO(a 4Π) state: Collisional removal of v=11 and a 4Π–B 2Π interactions

Copeland

Dyer

Bloemink

et al. 1997

The Journal of Chemical Physics

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State-resolved collisional energy transfer in highly excited NO 2 . I. Cross sections and propensities for J, K, and m J changing collisions Vibrationally excited levels of the a 4 ⌸ state, the lowest electronically excited state of the NO molecule, can be studied through their collisional energy transfer to the radiating B 2 ⌸ state. Following one-photon excitation in the 11-0 band of the forbidden a 4 ⌸ -X 2 ⌸ transition with the output of a tunable dye laser, we monitor the temporal evolution of the emission from the vϭ2 level of the B 2 ⌸ state. From pressure-dependence analysis, we determine the removal rate coefficients for a 4 ⌸(vϭ11) with NO, O 2 , N 2 O, N 2 , CO 2 , He, and Ar. In addition, using direct B 2 ⌸ excitation of the vϭ2, 3, 4 levels, we obtain removal rate coefficients for the same colliders. These vibrational levels span the region around a 4 ⌸(vϭ11). In general, a 4 ⌸ removal is quite fast, ranging from rate coefficients of 1.0ϫ10 Ϫ12 cm 3 s Ϫ1 to more than 1.0ϫ10 Ϫ10 cm 3 s Ϫ1 , and is substantially faster than B 2 ⌸ removal for N 2 , N 2 O, CO 2 , and Ar. NO͑B 2 ⌸, vϭ3͒ removal is generally much faster than that for the vϭ2 and vϭ4 levels, because of a localized perturbation between the vϭ12 level of the a 4 ⌸ state and vϭ3 of the B 2 ⌸ state. Preliminary measurements on transfer between the b 4 ⌺ Ϫ and B 2 ⌸ states are reported.

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NO(B 2Π) radiative lifetimes: v=0–6

Cited by 53 publications

References 29 publications

Rate Parameters for Electronic Excitation of Diatomic Molecules: NO Radiation

Rate Parameters for Electronic Excitation of Diatomic Molecules: NO Radiation

Laser-induced fluorescence excitation spectra due to the transition of NO in magnetic fields up to 10T

The NO(a 4Π) state: Collisional removal of v=11 and a 4Π–B 2Π interactions

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