Garrett K. Drayna

TL;DR: In this article, a two-stage buffer gas beam source was used for laser slowing of CaF molecules down to the capture velocity of a magneto-optical trap (MOT) for molecules.

TL;DR: In this paper, a two-stage buffer gas beam source was used for laser slowing of CaF molecules down to the capture velocity of a magneto-optical trap (MOT) for molecules.

TL;DR: The results indicate that hierarchical cognitive control is subserved by parallel and distributed association networks, together forming multiple localized functional gradients in different parts of association cortex.

Abstract: Direct loading of lanthanide atoms into magneto-optical traps (MOTs) from a very slow cryogenic buffer gas beam source is achieved, without the need for laser slowing. The beam source has an average forward velocity of 60– and a velocity half-width of , which allows for direct MOT loading of Yb, Tm, Er and Ho. Residual helium background gas originating from the beam results in a maximum trap lifetime of about 80 ms (with Yb). The addition of a single-frequency slowing laser applied to the Yb in the buffer gas beam increases the number of trapped Yb atoms to with a loading rate of . Decay to metastable states is observed for all trapped species and decay rates are measured. Extension of this approach to the loading of molecules into a MOT is discussed.

TL;DR: In this article, the authors directly observed conformational dynamics of 1,2-propanediol in cold (6 K) collisions with atomic helium using microwave spectroscopy and buffer-gas cooling.