Physics And Chemistry At Low Temperatures

Tunneling reactions in chemistry are characterized by the low-temperature limit when the classical contribution is negligible. Many practical applications benefit from the lack of heat and have a deep physical basis. Interesting advantages of chemical synthesis at low temperatures have also been demonstrated. This book covers fundamental and practical aspects of the processes and experimental and theoretical methods used in the field. The chapters are written by leading scientists who have very strong experience in the selected topics, and many practical recommendations can be found in this book.

The first unified treatment of experimental and theoreticaladvances in low-temperature chemistry Chemical Dynamics at LowTemperatures is a landmark publication. For the first time, thecumulative results of twenty years of experimental and theoreticalresearch into low-temperature chemistry have been collected andpresented in a unified treatment. The result is a text/referencethat both offers an overview of the subject and contains sufficientdetail to guide practicing researchers toward fertile ground forfuture research. Topics covered include: * Developmental history * Formulation of general problems and the main approximations usedto solve them * Specific features of tunneling chemical dynamics * One-dimensional tunneling in the path integral formalism * Special problems of two- and multidimensional tunneling * An extended presentation of pertinent experimental results

This book brings together, for the first time, the results of recent research in areas ranging from the chemistry of cold interstellar clouds (10-20 K), through laboratory studies of the spectroscopy and kinetics of ions, radicals and molecules, to studies of molecules in liquid helium droplets, to attempts to create molecular (as distinct from atomic) Bose-Einstein condensates.

This textbook contains information essential for successful experiments at low temperatures. The first chapters describe the low-temperature properties of liquids and solid matter, including liquid helium. Most of the book is devoted to refrigeration techniques and the physics on which they rely, the definition of temperature, thermometry, and a variety of design and construction techniques. The lively and practical style make it easy to read and particularly useful to anyone beginning research in low-temperature physics. Low-temperature scientists will find it of great value due to its extensive compilation of materials data and relevant new results.

Presents experiment, theory and technology in a unified manner. Contains numerous illustrations, tables and references as well as carefully selected problems for students. Surveys the fascinating historical development of the field.

The 13th International Conference on Low Temperature Physics, organized by the National Bureau of Standards, Los Alamos Scientific Laboratory, and the University of Colorado, was held in Boulder, Colorado, August 21 to 25, 1972, and was sponsored by the National Science Foundation, the U. S. Army Office of Scientific Research, the U. S. Atomic Energy Commission, the U. S. Navy Office of Naval Research, the International Institute of Refrigeration, and the Internation al Union of Pure and Applied Physics. This international conference was the latest in a series of biennial conferences on low temperature physics, the first of which was held at the Massachusetts Institute of Technology in 1949. (For a complete list of previous L T conferences see p. viii. Many of these past conferences have been coordinated and sponsored by the Commission on Very Low Temperatures of IUPAP. Subsequent LT conferences will be scheduled triennially beginning in 1975. LT 13 was attended by approximately 1015 participants from twenty five countries. Eighteen plenary lectures and 550 contributed papers were presented at the Conference. The Conference began with brief introductory and welcoming remarks by Dr. R. H. Kropschot on behalf of the Organizing Committee, Professor J. Bardeen on behalf of the Commission on Very Low Temperatures of the IUP AP, and Pro fessor O. V. Lounasmaa on behalf of the International Institute of Refrigeration. The eighth London Award was then presented by Professor E.