Accession Number : ADD095431

Title :   Excitation in Heavy Particle Collisions,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Thomas, E W

Report Date : Nov 1971

Pagination or Media Count : 436

Abstract : Excitation induced by collisions between atoms and ions has been a subject of detailed scientific research for some four decades. Impetus for such studies is provided by the visual observation of light emission in aurora, plasmas, and discharges. Most collisional excitation experiments involve spectrophotometric recording of light emission, but a few recent experiments are based on direct determinations of excited state formation. There is little unanimity in the data published by the separate research groups, even when they employ nominally the same experimental techniques. A scientist or engineer attempting to understand a physical situation is hampered by the confusion in the published data. The purpose of this monograph is to compile the available data and to attempt some reconciliation of the diverse results. My approach to this task has involved three distinct steps. First, I considered the philosophy of the experimental techniques and derived a series of criteria that must be fulfilled in order for an experiment to be deemed both a valid and accurate measurement of the stated physical quantity. In the second step, I cataloged and collected the data. My third and final step was to examine the experimental techniques against the criteria and thereby identify the deficiencies that exist in a particular study. These three distinct steps are reflected in the structure of the monograph. The first three chapters are devoted to formulating the criteria; Chapter Four is a catalog of the data; the remaining chapters contain the detailed compilation of data and examination of the experimental procedures.

Descriptors :   *PARTICLE COLLISIONS, *EXCITATION, *HEAVY IONS, *HEAVY PARTICLE RADIATION, INDEXES, EXPERIMENTAL DATA, CROSS SECTIONS, METHODOLOGY, THEORY, BOOKS, STANDARDS, TABULATION PROCESSES, MOLECULAR IONS, PARTICLE BEAMS, GASES, SPECTROSCOPY, INELASTIC SCATTERING, MEASUREMENT, PROBABILITY, PHOTONS, EMISSION SPECTRA

Subject Categories : Physical Chemistry
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE