Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

200 Poster session, J37Hyperfine Structure in Transition Metal Nitrides: ScN and YNLindsay N. Zack 1 , Matthew P. Bucchino 2 , Lucy M. Ziurys 31 University of Basel, Switzerland, lindsay.zack@unibas.ch; 2 University of Arizona, USA,cheeno30@email.arizona.edu; 3 University of Arizona, USA, lziurys@email.arizona.eduZack L.N.Bucchino M.P.Ziurys L.M.Rotational spectra for ScN (X 1 Σ + ) and YN (X 1 Σ + ), as well as their 15 N isotopologues,have been recorded using the Fourier-transform microwave (FTMW) spectrometer atthe University of Arizona. These molecules were synthesized in a supersonic jet byreacting metal vapor, produced via laser ablation of a metal rod, with ammonia in thepresence of a dc discharge. This is the first spectroscopic study of these molecules atmicrowave wavelengths.For ScN, the lowest rotational transition (J = 1 → 0) was measured at 33 GHz. Thespectra of ScN were characterized by strong electric quadrupole interactions from the Scnucleus (I = 7/2), which split the transition into three distinct hyperfine components.This was also observed in the Sc 15 N spectra, and it is consistent with previouslymeasuredSc-containing species. 1-3 In the Sc 14 N spectrum, each strong component wasfurther split into two or three hyperfine components, which were attributed toquadrupole interactions caused by the nitrogen nucleus (I = 1). The rotational constantfor ScN, B = 16571 MHz, was found to be in excellent agreement with previous opticalmeasurements. 4 The quadrupole constants, eQq, for Sc and 14 N nuclei were calculatedto be 33 and 0.069 MHz, respectively.Two rotational transitions of YN were recorded, the J = 1 → 0 and J = 2 → 1 at 25GHz and 50 GHz, respectively. Each transition was split into three hyperfinecomponents arising from the nitrogen quadrupole structure. Smaller splittings (