Basic Atomic and Molecular Spectroscopy (Hollas, J. Michael)

Optical spectroscopy of atomic and molecular positronium

Positronium (Ps) is a purely leptonic hydrogen-like atom formed from an electron and a positron. Since the interactions of electrons and positrons are thought to be almost entirely electromagnetic, precision measurements of the Ps energy levels should constitute a good test of QED theory. The ultimate precision is limited by the rapid annihilation of the various Ps states and the number of Ps a...

Michael J. Ryan

Michael J. Ryan is the Clark Hubbs Regents Professor in Zoology in the Section of Integrative Biology, University of Texas, Austin, USA, and a Research Fellow at the Smithsonian Tropical Research Institute in Panama. His main research has been on sexual selection and communication and his 1985 book The Túngara Frog: A Study of Sexual Selection and Communication has become a classic in that fiel...

Photoassociative molecular spectroscopy for atomic radiative lifetimes

When the atoms of a dimer remain most of the time very far apart, in so-called longrange molecular states, their mutual interaction is ruled by plain atomic properties. The highresolution spectroscopic study of some molecular excited states populated by photoassociation of cold atoms (photoassociative spectroscopy) gives a good illustration of this property. It provides accurate determinations ...

2 J ul 1 99 8 Active Stark Atomic Spectroscopy

Active Stark Atomic Spectroscopy (ASAS) method can be used to determine the electric field in the diode of an ion or electron accelerator as a function of position and time, including the positions of anode and cathode plasma emission surfaces (in order to obtain the effective accelerating gap). As possible probe beams, we suggest the use of lithium and sodium atoms. The diagnostic provides a m...

Atomic beam j