Date: Sat, 4 Mar 2006 14:56:46 +0100 (CET) From: Georges Audi To: Recipients of AMDC bulletin: ; Subject: AMDC - News from the Atomic Mass Data Center This bulletin of the AMDC reports on two papers of interest more specially for PhD students and PostDocs. A REVIEW ARTICLE by Klaus Blaum, High-accuracy mass spectrometry with stored ions Phys. Rep. 425, 1-78 (2006) http://dx.doi.org/10.1016/j.physrep.2005.10.011 High-accuracy mass measurements have a wide range of applications, including tests of quantum electrodynamics, the determination of fundamental constants, and tests of the Standard Model. The introduction of Penning traps and storage rings into the field of mass spectrometry has made this method a prime choice for studies of both short-lived and stable nuclides. This is reflected in the large number of traps in operation, under construction, or planned world-wide. With the development and application of proper cooling and detection methods the trapping technique has the potential to provide the highest sensitivity and accuracy, even for very short-lived nuclides far from stability. This review describes the basics and recent progress made in ion trapping, cooling, and detection for mass measurements with emphasis on Penning traps. Special attention is devoted to the applications of accurate mass values in different fields of physics. AN ARTICLE ON HISTORY by Georges Audi The History of Nuclidic Masses and of their Evaluation http://arxiv.org/abs/physics/0602050 The history of nuclear masses is almost as old as that of nuclear physics itself. It started with the development of mass spectrography in the late 1910's. In this article, the important steps in the history of mass spectrometry are given, with special focus on nuclear masses and the discoveries in physics that thrived on them. A short history of the mass unit is then given. It has not always been defined as one twelfth of the carbon-12 mass. The history of the evaluation of the nuclear masses is only slightly younger than that of the mass measurements themselves. In their modern form, mass evaluations can be traced back to 1955. Prior to 1955, several tables were established, the oldest one in 1935.