Knowledge Bank

The only successful demonstration of buffer-gas cooling and magnetic trapping of paramagnetic molecules was that performed by Doyle and co-workers in 1998} \textbf{395}, 148 (1998).}. It is anticipated that the relatively large rotational spacing and small spin-spin and spin-rotation interaction in the $X7\Sigma +$ (v = 0) state of MnH is a signature of a favorable ratio of elastic to inelastic collisions with helium atoms which is required for buffer-gas cooling and trapping. Furthermore, the large magnetic moment of the $N$ = 0, $X7\Sigma +$ (v = 0) state of MnH enables one to create a deep trap, and this allows a large enough trapping time to be able to isolate the sample from its environment by cryopumping the helium away. Here we report on the magnetic properties of MnH studied as a necessary preliminary to our use of it in buffer-gas cooling and magnetic trapping experiments. The Zeeman effect in the $P1$(0) branch feature ($\nu$ = 17568.3536 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$) of the $A7\Pi -X7\Sigma +$ (0,0) band system of MnH was selected for Zeeman measurements. The field free spectra is complicated but has been thoroughly analyzed} \textbf{95}(3), 1563-1576 (1991).}'} \textbf{156}, 296-318 (1992).}'} \textbf{241}, 192 (2007).}.