The high-resolution Fourier-transform emission spectrum of the c1Π–a1Δ transition of NH was recorded and analyzed. Improved line positions and molecular constants were determined from the 1–0, 0–0, and 0–1 vibrational bands. In addition to the rotational constants, lambda-doubling parameters for both the c1Π and a1Δ states were extracted from the line positions.
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The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Table 2
Vacuum Wave Numbers for the Lines of the 0–1 Band of c1II–a1Δ System of NHa
The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Table 3
Vacuum Wave Numbers for the Lines of the 1–0 Band of the c1II–a1Δ System of NHa
The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Overlapped by a line of the A–X system.
Table 4
Rotational Constants (in cm−1) for the a1Δ State of NH
Values in parentheses represent one standard deviation in the last digits.
The singlet–triplet splitting is 12 688.39(10) for a1Δ (υ = 0, J = 2)–X3Σ− (υ = 0, J = 1, N = 0) obtained from the line positions of Tables 1 and 3 and Refs. 14 and 15.
Table 5
Rotational Constants (in cm−1) for the c1II State of NH
The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Table 2
Vacuum Wave Numbers for the Lines of the 0–1 Band of c1II–a1Δ System of NHa
The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Table 3
Vacuum Wave Numbers for the Lines of the 1–0 Band of the c1II–a1Δ System of NHa
The numbers in the parentheses give the observed minus calculated line positions (in the units of 10−4 cm−1) using the constants of Tables 4 and 5.
Blended and given no weight in the final fit.
Overlapped by a line of the A–X system.
Table 4
Rotational Constants (in cm−1) for the a1Δ State of NH
Values in parentheses represent one standard deviation in the last digits.
The singlet–triplet splitting is 12 688.39(10) for a1Δ (υ = 0, J = 2)–X3Σ− (υ = 0, J = 1, N = 0) obtained from the line positions of Tables 1 and 3 and Refs. 14 and 15.
Table 5
Rotational Constants (in cm−1) for the c1II State of NH