NEW BOOKS Silver Activitation of Zinc Sulfide Single Crystals for Scintillation Counting. C. W . Moore, Air Force Institute of Technology. March 1959. 54 pages. P B 151793. $1.50.
Thermoluminescent Dosimeter.
Crystals used in this study were either cubic, hexagonal, or a mixture of both in their crystalline structure. Silver was thought to be incorporated in the zinc sulfide lattice as a monovalent cation s u b s t i t u t i o n a r y for the divalent zinc ions.
A special manganese-activated cal cium fluoride phosphor was devised for detection of x-ray and gamma-ray doses in the milliroentgen range. I t is said to show promise as a replacement for t h e photographic film badge in health physics applications.
J. Ή .
Schulman, R. J. Ginther, R. D . Kirk, and H . S. Goulart, Naval Research Laboratory. June 1959. 11 pages. P B 151725. 50 cents.
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H A M I L T O N C O M P A N Y , INC. P. O. BOX 307-B, WHITTIER, CALIFORNIA "RECISION M E A S U R I N G E Q U I P M E N T FOR C L I N I C A L A N D M E D I C A L R E S E A R C H Circle No. 44 on Readers' Service Card 70 A
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ANALYTICAL CHEMISTRY
Vapor Pressures of S o m e Hydrocar bons, in t h e Liquid a n d Solid State at Low Temperatures (NBS Tech nical N o t e 4 ) . W. T. Ziegler, N a tional Bureau of Standards, U . S. D e p a r t m e n t of Commerce. M a y 1959. 19 pages. P B 151363. 75 cents. T h e data included are for methane, ethane, ??-butane, ethylene, acetylene, propane, isobutane, n-pentane, propy lene, 1-butene, and cyclopropane. In general the range covered is from 1500 mm. down to about 0.001 m m . H g . Calculated Behavior of a Fast N e u tron Spectrometer Based on t h e Total Absorption Principle (NBS Technical N o t e 10). J. Ε Leiss, National Bureau of Standards, I". S. D e p a r t m e n t of Commerce. April 1959. 36 pages. P B 151369. $ 1 . Performance calculations for a spec trometer with a boron-10-loaded liquid scintillator are reported. They give enough information to allow a reason able estimate of the predicted perform ance for different sizes of the device, and to serve as a guide for experimental study. Ultraviolet X-Ray Physics a n d A p plications. Pomona College for Air Force Office of Scientific Research. June 1957. 101 pages. P B 151182. $2.25. This volume contains a collection of papers dealing with studies by ultrasoft x-radiations. T h e papers cover such subjects as ultrasoft x-ray analysis of micron systems and visual a n d photo metric " c o n t r a s t " in microcardiograms. Geiger Counter for Large Diameter Sources. L. Bird and J. Kinch, Army Chemical Center, I I . S. Army. J u n e 1958. 17 pages. P B 151321. 50 cents. Α 2τ7· flow-type Geiger-Miiller counter with a 4 3 / 4 - i n c h diameter window was developed. I t provides for the deter mination of the beta activity of radio active dust collected on 4-inch diameter filter papers. T h e counter can be adapted t o 4π counting. Infrared Dispersion a n d t h e Deter mination of Absorption Coef ficients. R . E . Kagarise, Γ . S. Naval Research Laboratory. M a r c h 1959. 23 pages. P B 151443. 75 cents. The feasibility of using the interferometric method to measure the re fractive index of organic liquids in the 2- to 22-micron region was demonCircle No. 140 on Readers' Service Card-
