High-resolution atomic-beam laser spectroscopy has been performed to study Stark effect of Ba atom. Stark spectra have been observed at various electric fields for Ba highly excited states. The scalar polarizability of the transition from 6s5d3D2 to 5d6p3F3 at 728.0 nm and the tensor polarizability of the 3F3 level have been determined for the first time, to be αs = −89.8 (12) kHz/(kV/cm)2 and ...

With a lot of attention focused on the potential for national health care reform and the raucous town hall meetings held by various members of Congress, it is important to remember that there are three substantive changes to the Federal Ethics in Physician Self-Referrals Act (known as the “Stark Law”) scheduled to take effect on October 1, 2009. Physicians and hospitals should review their join...

2014 The influence of the Stark effect on the l distribution of excited states produced by electron capture from atomic hydrogen into slow fully stripped ions is studied The Stark effect is strong enough, in these monoelectronic systems, to preclude any relation between the final l distribution and the primary process of electron capture. The latter determines the m distribution through « geome...

An upgraded spectral motional Stark effect diagnostic has been installed on the gas-dynamic trap (GDT) experiment to enable spatially resolved measurement of |B|. A new low-noise charge-coupled device detector, combined with enhancements of the diagnostic neutral beam, allows single-shot profile measurements. Previously only single-point motional Stark effect measurements were possible, and det...

Infrared spectroscopy is widely used to probe local environments and dynamics in proteins. The introduction of a unique vibration at a specific site of a protein or more complex assembly offers many advantages over observing the spectra of an unmodified protein. We have previously shown that infrared frequency shifts in proteins can arise from differences in the local electric field at the prob...

Higher order Stark spectroscopy has recently been introduced and applied to characterize the electrooptic properties of chromophores in bacterial photosynthetic reaction centers.1 In the course of these studies, an unusually large and broad higher order Stark effect with a novel line shape was discovered in the region of the monomeric bacteriochlorophyll absorption band. The origin of this new ...