1999
DOI: 10.1063/1.478453
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Infrared emission spectroscopy of NH: Comparison of a cryogenic echelle spectrograph with a Fourier transform spectrometer

Abstract: The high-resolution emission spectrum of NH has been observed in the near infrared using a Fourier transform spectrometer ͑FTS͒ and a cryogenic echelle spectrograph ͑called Phoenix͒ at the National Solar Observatory at Kitt Peak. By using a large format InSb array detector, the newly constructed Phoenix is calculated to offer a large increase in sensitivity over a Fourier transform spectrometer for measurements near 5 m ͑2000 cm Ϫ1 ͒. In order to test the performance of Phoenix, we recorded vibration-rotation … Show more

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Cited by 39 publications
(42 citation statements)
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References 61 publications
(47 reference statements)
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“…This has allowed the determination of an accurate set of parameters in the effective Hamiltonian. These vibration-rotation levels have been studied previously through electronic spectroscopy [2] and most recently (and accurately) through its infrared spectrum [20]. The rotational and fine-structure parameters determined in the latter study are compared with those of the present work in Table 4.…”
Section: Discussionmentioning
confidence: 89%
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“…This has allowed the determination of an accurate set of parameters in the effective Hamiltonian. These vibration-rotation levels have been studied previously through electronic spectroscopy [2] and most recently (and accurately) through its infrared spectrum [20]. The rotational and fine-structure parameters determined in the latter study are compared with those of the present work in Table 4.…”
Section: Discussionmentioning
confidence: 89%
“…For example, an accurate set of experimentally determined molecular parameters for 15 NH would permit the relative abundances of 14 N and 15 N to be determined in regions of star formation, providing information on this process. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 [20] in the least-squares fit. d The axial dipolar interaction c is related to the hyperfine t parameter by t = c 3 [35].…”
Section: Discussionmentioning
confidence: 99%
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“…Taking ! 3092:88 cm ÿ1 from spectroscopic constants in the literature [23,24] gives us a measured value of j 10 j 0:0540 0:0009 ÿ0:0018 D. Comparison of our experimental value of rad;exp : to theory is crucial to claim resolution of the conflicting published measured and theoretical values. To obtain a state-of-the-art calculated value we perform an ab initio calculation of the spontaneous emission lifetime of NHv 1.…”
Section: Prl 100 083003 (2008) P H Y S I C a L R E V I E W L E T T Ementioning
confidence: 99%