Analysis and Transition Probabilities for the Na2B1Πu→X1Σ+gSystem Using as Excitation the 4727-Å Ar+Laser Line

Camacho, J.J.; Pardo, A.; Polo, A.M.; Reyman, D.; Poyato, J.

doi:10.1006/jmsp.1998.7627

Cited by 14 publications

(10 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In brief, the sodium metal is loaded into a five-arm stainlesssteel heat-pipe oven with about 1 Torr of argon buffer gas. [18][19][20][21][22][23][24][25] A single-mode tunable ring-dye laser ͑Coherent 899-29 autoscan, pumped by a diode-pumped solid-state laser, Coherent Verdi-10͒ is used to probe the high-lying Rydberg states from the populated intermediate levels of the B 1 ⌸ u state. The temperature around the center of the heat pipe is stabilized at 350°C.…”

Section: Methodsmentioning

confidence: 99%

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Chang

Tsai

Whang

et al. 2005

The Journal of Chemical Physics

View full text Add to dashboard Cite

The phenomenon of electronic orbital angular momentum L uncoupled from its internuclear axis has been observed in the sodium dimer using high-resolution cw optical-optical double-resonance spectroscopy. When L uncoupling occurs, the degeneracy of Lambda doubling is removed. In our experiment, the intermediate B (1)Pi(u) state of Na(2) is excited from the thermally populated ground X (1)Sigma(g) (+) state by a single-line Ar(+) laser. Then, a single-mode dye laser is used to probe the Rydberg states from the intermediate state. The signals are detected by monitoring the UV fluorescence from the triplet gerade states back to the a (3)Sigma(u) (+) state via collision energy transfer. Under our experimental resolution, the splitting of Lambda doubling in the 5 (1)Delta(g) state of Na(2) can be measured. A total of 136 rovibronic levels with ef parities have been assigned to the 5 (1)Delta(g) state. The Lambda-splitting constants deduced from these data are q(0)=0.376(90)x10(-4) cm(-1), q(v)=0.114(6)x10(-4) cm(-1), and mu=0.76(33)x10(-8) cm(-1). In general, the Lambda splitting of the Delta states is considerably smaller than that of the Pi states. However, the first-order splitting constants q(0) and q(v) reported here are larger than those in the B (1)Pi(u) state. This is due to the L uncoupling of the Rydberg states.

show abstract

Section: Methodsmentioning

confidence: 99%

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Chang

Tsai

Whang

et al. 2005

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…In order to calculate the intensities in the B 1 u → X 1 + g fluorescence transitions, hybrid potentials for both electronic states were constructed. The RKR points [16] for both potentials were interpolated by a spline fit to obtain a smooth potential curvature. We considered the following representation for the B 1 u potential barrier:…”

Section: Resultsmentioning

confidence: 99%

“…The calculations of radiative transition probabilities and lifetimes reported here include the rotational dependence of the variation of the B-X electronic transition moment function with internuclear distance (no Franck-Condon or R-centroid approximation). For the calculation of wavefunctions and radiative transition probabilities between vibrational-rotational states implied in the transitions we have used precise potential energy curves (basically RKR type) for both B 1 u and X 1 + g electronic states constructed up to dissociation from data reported in our laboratory [16]. A comparison between theoretical and experimental values of radiative transition probabilities and lifetimes for the observed fluorescence series shows a good agreement between the experimental measurements and the calculated theoretical values.…”

Section: Introductionmentioning

confidence: 91%

“…Recently, some studies on intensities of laser-induced fluorescence spectra have been made in our laboratory for molecules such as Na 2 (see Poyato et al [17], Camacho et al [16,18]), KH [19] and Te 2 [20]. An important motivation for this research is the detailed analysis (direct and satellite lines) of LIF spectra with special emphasis on the determination of precise fluorescence line intensities and comparison with calculated accurate radiative transition probabilities and lifetimes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser-induced (5145 Å) B¹Π_u→X¹Σ⁺_gfluorescence of Na₂

Camacho¹,

Pardo²,

Acín

2001

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Laser-induced emission of the Na 2 molecule consisting of discrete molecular fluorescence series was observed in the gas phase at an excitation wavelength of 5145.308 Å from an argon-ion laser. Eighteen fluorescence series for the B 1 u → X 1 + g band system have been observed and analysed. Several fluorescence series are reported for the first time. The radiative transition probabilities for the observed fluorescence series were calculated using experimentally based hybrid potential energy curves for the B 1 u and X 1 + g states constructed up to dissociation and a B-X transition dipole moment function. Radiative lifetimes for the rovibrational levels of the upper states pumped by the laser line have also been calculated. The transition probabilities and lifetimes agree with the corresponding observed measurements usually within the experimental uncertainty. A strong rotational satellite structure, with jumps with J = ±1, ±2, . . . , ±16 in some cases, for the most intense bands of several fluorescence series was also analysed. Absolute integral cross sections for collision-induced rotational transitions, when Na * 2 (v , J ) in the B 1 u state collides with Na atoms, for some v -v vibrational bands of intense fluorescence series, are also reported.

show abstract

“…The initial work about intensities of Na 2 B-X system is the Hessel-SmithDrulliger work (4). Also, intensity studies using photographic plates have been carried out in our laboratory (5). The photographic intensity studies presented saturation problems.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Transition Probabilities for the Na2B1Πu→X1Σ+gSystem Using as Excitation the 4727-Å Ar+Laser Line

Cited by 14 publications

References 36 publications

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Laser-induced (5145 Å) B¹Π_u→X¹Σ⁺_gfluorescence of Na₂

Laser-Induced Irradiance Fluorescence of Molecular Sodium Excited by the 4765 Å Ar+ Laser Line

Contact Info

Product

Resources

About

Analysis and Transition Probabilities for the Na2B1Πu→X1Σ+gSystem Using as Excitation the 4727-Å Ar+Laser Line

Cited by 14 publications

References 36 publications

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Observation of L uncoupling in the 5Δg1 Rydberg state of Na2

Laser-induced (5145 Å) B1Πu→X1Σ+gfluorescence of Na2

Laser-Induced Irradiance Fluorescence of Molecular Sodium Excited by the 4765 Å Ar+ Laser Line

Contact Info

Product

Resources

About

Laser-induced (5145 Å) B¹Π_u→X¹Σ⁺_gfluorescence of Na₂