NUCLEAR QUADRUPOLE HYPERFINE SPLITTING IN THE SPECTRA OF INTERSTELLAR MOLECULES

The main constituents of interstellar molecules are ~1, H^(12)C,^(14)N,^(16)O^(32)S,^(28)Si.Within them ,only ^(14)N nucleus has a quadrupole moment.Therefore the spectra of the interstellar molecules with constituent ^(14)N havethe nuclear quadrupole hyperfine splittings which could be resolved by virtueof the advanced techniques in some sources.Measurement of the ratios(R)of the hyperfine(hf)satellite intensities(I)offers important astrophysicalinformations. If the excitation temperatures of the hyperfine satellites