Theoretical Calculation Of Hyperfine Structure And A-X Transition Spectrum Of YbOH

In this paper,we construct the effective spin-rotational Hamiltonian matrix,Stark matrix and Zeeman matrix of the X²??010?and A²??000?states of ¹⁷⁴YbOH molecule,and compile the Fortran program to calculate its hyperfine structures,Stark shifts,and Zeeman shifts by diagonalizing the matrix of the effective Hamiltonian.Also,we discuss the possibility of the fully polarization of ¹⁷⁴YbOH in the external static electric field by analyzing the eigenvector of the effective Hamiltonian and simulating the relationship between polarization and the electric field.Finally,we use Einstein transition probabilities theory to derive the transition probability function of A²??000?-X²??010?of ¹⁷⁴YbOH,and compile the Fortran program to simulate the transition spectrum of A²??000?-X²??010?of¹⁷⁴YbOH.In experiment,we design and setup the experimental apparatus based on the supersonic expansion and Laser-Induced Fluorescence?LIF?techniques,then record partial spectra of A²??000?-X²??000?transition of ¹⁷⁴YbOH for testing the experimental system.