Written in English
Thesis (M.A.)--Boston University, 1949.
|The Physical Object|
|Pagination||x, 47 pages|
|Number of Pages||47|
AN ELECTROSTATIC BETA-RAY SPECTROMETER WITH A DOUBLE RETARDING FIELD. Author(s): Johnston, Herbert Raymond. et al. Main Content Metrics Author & Article Info. Main Content. Download PDF to View View Larger. Thumbnails Document Outline Attachments. Previous. Next. Highlight all Match : Herbert Raymond. Johnston. AN ELECTRO-STATIC BETA-RAY SPECTROMETER, USING A SPHERICAL CONDENSER BY M. C. JOSHI AND B. V. THOSAR (Tata Institute of Fundamental Research, Bombay-l) Received August 3, (Communicated by Dr. H.J. Bhabha, , F.A.S¢.) INTRODUCTION THE theory of a focussing device for electrons using the inverse first power. The construction and preliminary tests of a Beta-ray spectrometer designed to work at energies below Kev is described. The instrument is of the small semi-circular focussing type using four counter pairs. The design is for reasonably high resolution and high transmission angle. The magnetic field is produced by a combination of plane coils designed to maintain field homogeneity to better. Formulas are given which express the theoretical line shape obtained in a semicircular beta‐ray spectrometer. The sources are taken to be plane, uniform, and isotropic. Line shapes of a .
BETA-RAY SPECTROMETER THEORY AND DESIGN, MAGNETIC ALPHA-RAY SPECTROSCOPY, HIGH RESOLUTION SPECTROSCOPY K. SIEGBAHN 3 1. Introduction. General discussion of spectrometers Parallel to the experimental work on the study of nuclear decay schemes and other problems in nuclear spectroscopy, continuous work has been devoted to the per-. An intermediate image beta‐ray spectrometer has been constructed utilizing the focusing properties of a U‐shaped magnetic field distribution. The construction and performance of the instrument are discussed. A transmission of ten percent has been attained with a . A Siegbahn-Edvarson Type Ironfree Double Focusing Beta-Ray Spectrometer. C. De Vries, A.H. Wapstra. Pages Download PDF. Tandem Electrostatic Accelerators. R.J. Van De Graaff. Pages Download PDF. Book review Full text . In this work, electrostatic focusing is used to overcome the limits of aerodynamic focusing in the analysis of nanometer-sized particles by aerosol mass spectrometry. A simple tube lens is used to focus charged particles into the ablation laser beam path.
A relatively inexpensive ° magnetic focusing beta‐ray spectrometer has been constructed, having a principle orbit radius of 15 cm. A radially inhomogeneous field provides essentially perfect focusing of electrons leaving the source within a 33° angle. In operation, with a 1‐mm wide source, the transmission is percent, the full width at half‐maximum of an internal conversion line. A selected electron beam of 100 V energy was found to have an energy distribution with a 0 V width at half-peak value. The ion-source was used with a in. radius 60°-sector type of direction-focusing mass spectrometer. A method for electronically differentiating . It should be noted here that a beta-ray spectroscope is called either a spectrograph, if a photographic plate is usedfor detection, or a spectrometer, if a counter is detection.. All beta-ray spectroscopes employ either electrostatic or magnetic focusing, the latter being predominant. Books have played and continue to play major roles in the development of mass spectrometry even though most research results first appear in journals. Many aspects of the scale, spread, and character of the development and application of mass spectrometry throughout the chemical sciences over many decades are manifest in this categorized list.