Intensity measurements and relative band strengths of the bands (B to X) system of lanthanum oxide

Murthy, N. Sreedhara; Murthy, B. Narasimha

doi:10.1088/0022-3700/5/3/038

Cited by 16 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reported effective rotational temperature value for B-X band system of 121 Sb 16 O molecule is to be 4730 ± 111 K by Suresh Kumar et al (2003). The effective vibrational temperature of 4790 ± 200 K for B 2 -X 2 band system of LaO molecule was obtained assuming the variation of R e (r v v ) withr v v by Murthy and Murthy (1972). For TiO molecule, the most studied species, the lower limit of temperature is 2980 ± 200 K reported by Sotirovski (1971).…”

Section: Resultsmentioning

confidence: 95%

Astrophysically useful radiative transition parameters for the e 1Π–X 1Σ+ and 1Σ+–X 1Σ+ systems of zirconium oxide

Shanmugavel¹,

Sriramachandran²

2010

Astrophys Space Sci

View full text Add to dashboard Cite

The zirconium oxide (ZrO) is well known for its astrophysical importance. The radiative transition parameters that include Franck-Condon (FC) factor, r-centroid, electronic transition moments, Einstein coefficient, band oscillator strengths, radiative life time and effective vibrational temperature have been estimated for e 1 -X 1 + and 1 + -X 1 + band systems of 90 ZrO molecule for the experimentally known vibrational levels using RKR potential energy curves. A reliable numerical integration method has been used to solve the radial Schrödinger equation for the vibrational wave functions of upper and lower electronic states based on the latest available spectroscopic data and known wavelengths. The estimated radiative transition parameters are tabulated. The effective vibrational temperatures of these band systems of 90 ZrO molecule are found to be below 4200 K. Hence, the radiative transition parameters help us to ascertain the presence of 90 ZrO molecule in the interstellar medium, S stars and sunspots.

show abstract

Section: Resultsmentioning

confidence: 95%

Astrophysically useful radiative transition parameters for the e 1Π–X 1Σ+ and 1Σ+–X 1Σ+ systems of zirconium oxide

Shanmugavel¹,

Sriramachandran²

2010

Astrophys Space Sci

View full text Add to dashboard Cite

show abstract

“…The intensity measurements of various bands appearing in different electronic transitions along with the calculations of Franck-Condon (FC) factors, F centroids and band strength help to understand the variation of electronic transition moment R.. Murthy and Murthy (1972) reported the band strength of the bands belonging to the B '2-X ' X system of L a 0 using FC factors and F centroids calculated from Morse potential. In a later publication (Murthy and Murthy 1977) they have shown that the Morse potential is not a good fit to the B ' X state in comparison with the RKR potential energy curve as the deviations are more for higher vibrational levels. As a result they have used the FC factors and F centroids calculated using R K R potentials and determined the effective vibrational temperature as 5500*40 K where R, variation with r was considered.…”

Section: Introductionmentioning

confidence: 99%