We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
76 RADIOISOTOPES SERIES half life, and effective half life are considered. The responsibility of the radioisotope user to other members of the laboratory and to the public is emphasized. PRACTICAL PROCEDURES OF MEASUREMENT (PMF-5145-C). 48 minutes. Sale price: $62.48. For loan source see Army Field Library Listing, page 74. This film explains the need for radiation measurements, the principles and use of various types of instrumentation (with emphasis on the Geiger-Mueller counter), and topics such as background, threshold value, and plateau and counting statistics. Sample preparation is demonstrated. The film also explains and demonstrates absolute and comparative activity measurements. PRACTICE OF RADIOLOGICAL SAFETY (PMF-5145-F). 33 minutes. Sale price: $43.03. For loan source see Army Field Library Listing, page 74. This film depicts a visit through a radioisotope laboratory and dis- cusses handling of radioisotope shipments; preparation of therapeutic doses; need for, and function of, a local radioisotope committee; laboratory design; decontamination; use of shielding; measurement of personnel exposure, and other topics pertinent to health safety. PROPERTIES OF RADIATION (PMF-5145-B). 68 minutes. Sale price: $88.43. For loan source see Army Field Library Listing, page 74. This film shows a Geiger counter used to compare penetrations of alpha, beta, and gamma radiation and to derive their characteristic absorption curves. The beta-radiation section of the film presents the cloud-chamber electrostatic generator and beta-ray spectrometer, as well as the concepts of ionization, electron volt, beta-ray spectrum, neutrino, scattering, nonlinear absorption, and density thickness (mg/ cm 2 ). The gamma-radiation section explains bremsstrahlung, photo- electric effect, Compton scattering, pair production, exponential ab- sorption, absorption coefficient, and half thickness. The final section concerns the interpretation of composite absorption curves. THE RADIOISOTOPE IN GENERAL SCIENCES (PMF-5147-C). 46 minutes. Sale price: $59.87. For loan source see Army Field Library Listing, page 74. This film shows that the radioisotope is a research tool adaptable to tracer investigations in all branches of general science by tracing eight experiments illustrating how radioisotopes can be used in metallurgy, chemistry, biochemistry, and plant physiology, shown in