Molecular beam electric resonance study of the ground and excited states of cyanoacetylene

Abstract

Cyanoacetylene was studied using molecular beam electric resonance spectroscopy. Ground state results are μ=3.731 72 D, eQq=−4319.24 kHz, CN=0.976 kHz. Zero field spectra were observed for the three singly excited bending modes and Stark data were taken for the lower energy of two of these three states. Excited state results include ν7; μ=3.7225 D, eQqaa=−4302.0 kHz, eQ(qbb−qcc)=−28.8 kHz, CN(J=2)=1.47 kHz; ν6; μ=3.7263 D, eQqaa=−4369.7 kHz, eQ(qbb−qcc)=177.1 kHz, CB(J=2)=1.30 kHz; ν5; eQqaa=−4325.7, eQ(qbb−qcc)=96.8 kHz, CN(J=2)=1.33 kHz. l-doubling constants were also obtained for the degenerate vibrations.

13C ISOTOPIC FRACTIONATION OF HC3N IN STAR-FORMING REGIONS: LOW-MASS STAR-FORMING REGION L1527 AND HIGH-MASS STAR-FORMING REGION G28.28-0.36

“…J(T) in Equation (4) is the Planck function. In Equation (5), N is the column density, ∆v is the line width (FWHM), Q is the partition function, µ is the permanent electric dipole moment of HC 3 N (3.73172 × 10 −18 esu cm, Deleon & Muenter (1985)), and E lower is the energy of the lower rotational energy level. Sakai et al (2009) derived the excitation temperatures and the column densities of HC 3 N using the LTE analysis.…”

13C Isotopic Fractionation of HC3N in Two Starless Cores: L1521B and L134N (L183)

“…In Equation (3), N is the column density, ∆v is the line width (FWHM, Table 1), Q is the partition function, µ is the permanent electric dipole moment of HC 3 N, and E lower is the energy of the lower rotational energy level. We used 3.73172 D for µ of HC 3 N (Deleon & Muenter 1985).…”

An atomic and molecular database for analysis of submillimetre line observations

“…a Same data are also adopted for isotopes and deuterated species, unless stated in the datafile. Hoeft et al (1969); (7) Botschwina et al (1993); (8) Botschwina (1989); (9) Defrees et al (1982); (10) Muenter (1968); (11) DeLeon & Muenter (1985); (12) Ebenstein & Muenter (1984); (13) Blackman et al (1976); (14) Hocking et al (1975); (15) Gadhi et al (1995); (16) Fabricant et al (1977); (17) ; (18) Botschwina & Sebald (1985); (19) Sastry et al (1981); (20) Cohen & Poynter (1974); (21) From JPL based on Camy-Peyret et al (1985); (22) Suenram et al (1989); (23) De Leeuw & Dymanus (1971); (24) Peterson et al (1984); (25) Botschwina et al (1984).…”