Share Icon Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Search Site Citation William J. Price, R. M. Williamson; Nuclear Radiation Detection. Physics Today 1 October 1958; 11 (10): 34. https://doi.org/10.1063/1.3062229 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown Menu input auto suggest filter your All ContentPhysics Advanced

This review covers a relatively mature area of atomic spectrometry, hence, there are fewer new developments than in newer research fields. It should be read conjunction with the previous year's review1 and other related reviews series.2–6 A great deal literature on sample introduction methods has been generated, mainly describing preconcentration or vapour generation, but very little that is new. The main development instrumentation advent microplasmas for lab-on-a-chip applications. Laser...

Several acoustic properties of anisotropic media have been investigated by the pulsed ultrasonic method and results analyzed in terms plane waves traveling through an infinite medium. Single crystals ammonium dihydrogen phosphate (ADP) potassium (KDP) were subjects this study each case velocity measurements used to compute a complete set elastic moduli. Coupling between modes which simultaneous generation two transducer transfer energy during reflection was studied. The phenomenon acoustical...

Atomic force acoustic microscopy (AFAM) was used to quantitatively determine material indentation moduli by measuring local mechanical responses. A dual reference method has been shown be capable of extracting the modulus a within 3% calculated expected value without any assumptions probe’s properties. The use this developed also allows for calculation maximum precision in quantitative determination materials using AFAM. parallel analysis single and AFAM techniques isolates inaccuracy...

ABSTRACT In much of the northern Great Basin western United States, rangelands, and semi‐arid ecosystems invaded by exotic annual grasses such as cheatgrass ( Bromus tectorum ) medusahead Taeniatherum caput‐medusae are experiencing an increasingly short fire cycle, which is compounding persistent. Improving expanding ground‐based field methods for measuring above‐ground biomass (AGB) may enable more sample collections across a landscape over succession regimes better harmonize with other...

The dependence of the local Young's modulus organic thin films on size domains at nanometer scale is systematically investigated. Using atomic force microscopy (AFM) based imaging and lithography, nanostructures with designed size, shape, functionality are preengineered, e.g., octadecanethiols inlaid in decanethiol self-assembled monolayers (SAMs). These characterized using AFM, followed by modulation spectroscopy measurements. then extracted from these measurements a continuum mechanics...

A pulse technique at 10 Mc/sec. has been used to study the anomalous elastic properties of rochelle salt single crystals temperature around upper Curie temperature. The dependence foiled crystal constant $S_{44}^{}{}_{}{}^{E}$ and attenuation waves which contain a component shear strain in $X$ crystallographic plane is reported. measurements are formulated terms interaction theory.The velocity 45\ifmmode^\circ\else\textdegree\fi{} cut on d.c. field crystal-lographic direction shows marked...

The author describes benchmarking and discusses some of the specific benchmark tests for computer systems that are in use today. He examines pitfalls involved with comparison analysis points out how to avoid, or at least minimize impact of, such problems. goal is learn gather interpret meaningful data. Benchmark test results tabulated Dhrystone 1.1, Digital Review, Dodec, Khornerstone, Linpack, Livermore Fortran Kernel, SPICE, Stanford, single-precision Whetstone benchmarks.< <ETX...

This review covers a relatively mature area of atomic spectrometry, hence there are fewer new developments than in other research fields. The should be read conjunction with the previous year's and related reviews series. Over last several years emphasis has shifted from novel to more routine applications. A plethora methods have been developed for preconcentration separation analyte matrix prior sample introduction. Some fundamental studies plasmas published, laser induced breakdown...

The method described can be used for the dissolution and determination of major minor constituents in a wide range compositions siliceous materials. A pressure vessel is fast complete acid attack. principle solvent hydrofluoric acid, but boric added after to complex excess dissolve precipitated fluorides. second heating step shown greatly improve efficiency this process.Most inter-element interferences are removed presence fluoroboric so formed when dinitrogen oxide-acetylene flame used....

The determination of silicon by atomic-absorption spectrophotometry in silicon-containing and siliceous materials has been investigated. Means are outlined which many types sample can be completely dissolved without loss silicon, thus avoiding the need for fusion. Full operating details given, results, accuracy sensitivity method discussed.

The determination of manganese, nickel, chromium, molybdenum, copper, vanadium, cobalt, titanium, tin, aluminium and lead in steel by a direct atomic-absorption method, which involves single dissolution based on perchloric acid, is described. scheme effects considerable savings time compared with traditional methods, comparable accuracy.The serious depressive interferences caused iron the response some elements are overcome nitrous oxide-acetylene flame, minor corrected for inclusion...

This review period has seen the continuation of trend towards publication many routine applications rather than novel instrumental or methodological advances, particularly for FAAS, ICP-AES and ETAAS. Likewise there been a marked decrease in number publications on fundamental studies, chemometrics solid sampling. reflects maturity atomic emission absorption methods analysis, possibly move mass spectrometry as preferred method analysis. New approaches variations existing themes sample...

Interferences in the absorption of chromium and molybdenum steels are overcome nitrous oxide-acetylene flame by using perchloric acid as solvent. The method is rapid suitable for any level or found other metallic alloys. An alternative determination necessary when tungsten concentration exceeds 0·5 per cent.; this involves use a perchloric-phosphoric-sulphuric mixture to retain solution. A difference read-out technique obtain good precision high levels described.

The determination, by atomic-absorption spectrophotometry, of small amounts nickel in edible fats is described. Nickel extracted from the samples with 10 per cent. nitric acid presence carbon tetrachloride, to break emulsion, and aqueous layer aspirated directly determine nickel. method requires only 15 minutes for completion, detection limit better than 0·1 p.p.m.

Abstract A simple nomographical method of evaluation minor constituents is given which, provided that the density values all fall on straight line portion H &amp; D curve emulsion used, independent gamma variation. When nomograph drawn, not only docs it correct for changes in across one plate, but also from plate to any type, thus obviating need repeated standardization.

This review covers a relatively mature area of atomic spectrometry, so there are consequently fewer new developments than in newer research fields. The period has seen consolidation AES using lasers as excitation sources, particulalry making use their principal advatage for remote analysis. Considerable activity relating to preconcentration, matrix separation and sample introduction was evident during the period, though very few were reported. Vapour generation non-tradiational elements...

This review covers a relatively mature area of atomic spectrometry, hence there are fewer new developments than in newer research fields. It should be read conjunction with the previous year's review1 and other related reviews series.2–6 There is still considerable published work sample introduction, mostly concerning pre-concentration and/or matrix removal. Despite maturity most techniques this clearly presents problem, every being different. Chemical vapour generation an which has...

Abstract Atomic absorption spectrophotometry has been used to compare the concentrations of iron and tin in canned fruit juice with those not stored cans. No significant difference was found level iron, but amount considerably higher samples. The determination is rapid, no ashing procedure required.