Showing papers in "Nuclear Instruments and Methods in Physics Research in 1984"

TL;DR: In this article, the authors describe a novel charge tranport scheme in semiconductors, in which the field responsible for the charge transport is independent of the depletion field, which leads to the following new semiconductor detectors: (1) Semiconductor Draft Chamber; (2) Ultra low capacitance - large semiconductor x-ray spectrometers and photodiodes; and (3) Fully depleted thick CCD.

TL;DR: In this article, the problem of fitting curves to histograms in which the data obey multinomial or Poisson statistics is examined in light of standard results found in the statistics literature, and a sufficient condition for equality of the area under the fitted curve and the number of events on the histogram is clarified.

TL;DR: In this paper, it is shown that using electrons and laser photons with helicities λ and Pc, such that λPc < 0, essentially improves the monochromatization.

TL;DR: A modification of the common method for electrodepositing actinides, that of Talvitie [1], has been found to improve deposition yields significantly as mentioned in this paper, with yields of about 90-100% for curium, americium, plutonium, neptunium, uranium, thorium polonium and lead and less than 1% for radium.

TL;DR: In this paper, the authors explore the possibility of low-temperature calorimetry to improve the limits on processes such as neutrinoless double-beta decay and electron decay.

TL;DR: In this article, the authors used a Ge(Li) crystal and an intrinsic germanium crystal with a 1 cm diameter well to measure radium activity and activity ratio in ground waters and estuarine waters.

TL;DR: In this article, the authors review the principles and assumptions of the detrital correction schemes, discuss the theoretical and experimental aspects of the mixing-line plots as suggested by Rosholt and Szabo, and recommend analytical procedures pertinent to the use of such plots.

TL;DR: In this paper, the points measured on the track are included backwards, one by one, in the fitting algorithm, and the scattering is handled locally at each step; the algorithm is very flexible and allows fast programmation; moreover the computation time is merely proportional to the number of measured points, contrary to the other optimal estimators.

TL;DR: In this paper, the design of an anti-Compton spectrometer consisting of a Ge detector and an asymmetric anti-compton shield made of bismuth germanate is described.

TL;DR: In this article, a device that can produce synchrotron radiation whose polarization can be arbitrary and adjustable is proposed, which can be linear and be switched between two mutually perpendicular directions, or it can be circular and switch between right and left circular polarizations.

TL;DR: The accuracy of oceanic 210Pb data is estimated to be ±10%, somewhat worse than the attainable precision as mentioned in this paper, but the accuracy of 210Po data is better than the achievable precision.

TL;DR: In this article, the authors used synchrotron X-ray computed tomography (CT) images of an excised pig heart to study the properties of an iodinated medium.

TL;DR: In this paper, a variety of instruments results from selecting different coding patterns and from simple geometrical variations on this theme and various schemes which have been proposed and used and the methods of interpreting the data obtained with them are reniewed and compared.

TL;DR: In this paper, the authors presented an instrument that allows a solid surface, prepared with established ultrahigh vacuum (UHV) procedures, to be examined by X-ray diffraction.

TL;DR: In this paper, the highly segmented electromagnetic and hadronic calorimeter of the UA2 experiment has been successfully operated at the CERN p p p Collider for more than 3 years.

TL;DR: An analog feedback control system for instruments which use synchrotron X-radiation and double cyrstal arrangements in a parallel setting as monochromator or plane wave generators is described in this article.

TL;DR: In this paper, a method for the analysis of 99Tc in environmental samples has been developed, where technetium is reduced to +IV oxidation state and co-precipitated with iron hydroxide.

TL;DR: The 500 MeV electron-scattering facility, designed and built in conjunction with the 2.5% duty factor electron linear accelerator (MEA), has been completed as mentioned in this paper.

TL;DR: In this paper, the features of the invariant mass distribution obtained from combinations of particles from different events, i.e., event mixing, are studied in detail. But it is shown that special care is needed in order to reproduce the shape of the uncorrelated invariant Mass distribution.

TL;DR: In this article, a new electrostatic electron spectrometer is described which incorporates an electron retarding device in series with a double cylindrical mirror-analyser, particularly designed for measuring low energy electrons and has an upper energy limit ∼ 50 keV.

TL;DR: A review of the effects of radiation damage on silicon detectors is presented in this paper, where the main degradation in performance is an increase in leakage current, which can be well characterized by an empirical damage constant for many radiations.

TL;DR: Techniques for the preparation of sources suitable for alpha spectrometric measurments are presented in this paper, including vacuum sublimation, electrodeposition, self-deposition and direct evaporation.

TL;DR: In this article, a combination of both the time-of-flight and ionization chamber, to produce an energy-time-offlight spectrometer, was tested with fragments from the 235U(n, f) reaction on an external thermal neutron beam at the ILL/Grenoble.

TL;DR: In this paper, the authors focused on noise limitations in the photodiode/amplifier combination for the readout of bismuth germanate crystals (BGO), with the eventual achievement of a noise-limited resolution of 325 keV (standard deviation).

TL;DR: The basic principles of transmission tomography using X- and γ-radiations are briefly reviewed, for industrial applications, gamma sources have many advantages over X-ray tubes, but can never rival them in intensity as discussed by the authors.

TL;DR: It is argued that there is no single correct algorithm for maximum entropy image restoration and the properties of the four different methods are compared using simple 1D simulations with a view to showing how they can be used together to gain as much information as possible about the original object.

TL;DR: The new EXAFS beam line for biological applications built in HASYLAB by the Hamburg Outstation of the European Molecular Biology Laboratory (EMBL) is described in this paper.

TL;DR: In this article, a single anode wire position sensitive gas proportional detector with a fwhm of 80 μm for a highly collimated monochromatic beam of 8 keV photons over a useful range of 38 mm, operated with 600 Torr Xe/CH4.

TL;DR: A microprocessor-based picture analysis system for automatic track measurements and the methods of picture analysis which are used for the track identification and measurement are described.

TL;DR: The application of gamma-ray scattering techniques to monitor composition variations has yet to be fully exploited as discussed by the authors, and several systems, using sources in fixed and scanning configurations, have been developed to measure electron densities and to image body tissue.