Showing papers in "Nuclear Instruments and Methods in 1979"

TL;DR: A microchannel plate (MCP) as discussed by the authors is an array of 104-107 miniature electron multipliers oriented parallel to one another (see Fig. 1); typical channel diameters are in the range 10-100 μm and have length to diameter ratios (α) between 40 and 100.

TL;DR: Several improvements have been made to the Monte-Carlo neutron detector efficiency code of Stanton to provide improved agreement with several different detector efficiency measurements as mentioned in this paper, including a re-adjustment of the inelastic cross sections for neutron-induced reactions on carbon, adoption of new light-response functions, use of relativistic kinematics, and exact determination of light deposited by escaping charged particles.

TL;DR: The development of organic scintillators is reviewed with emphasis on work that has been reported since 1964 as mentioned in this paper, and the scintillation process is discussed, including response energy dependence, energy resolution, timing characteristics, pulse shape discrimination and anisotropy.

TL;DR: The velocity filter SHIP installed at the UNILAC (GSI Darmstadt) is described in this paper, which is used for the investigation of neutron deficient nuclei generated by heavy ion induced fusion.

TL;DR: In this paper, the correction factors for the same geometries for the most abundant lines of 18 radionuclides were calculated experimentally, and the correction factor was found to vary between 1.0 and 1.5 depending on the particular decay scheme.

TL;DR: In this article, high precision backscattering assemblies for absolute yield measurements have been built and calibrated to ± 1% on three different MeV ion accelerators, and the Bi-content in a set of Bi-implanted silicon standards (from the recent Karlsruhe ‘round-robin’ project) has been accurately measured in each of these assemblies: the resulting value is 477(± 0.07) × 1015 Bi atoms/cm2.

TL;DR: The Superheated Drop Detector (SDD) as mentioned in this paper is a new tool for radiation spectrometry, area monitoring, and dosimetry that may find use in nuclear science, safety, and medicine.

TL;DR: In this paper, a combination of binary and tertiary gas mixtures has been discovered for which the electron energies and the overall scattering cross sections that correspond to these are reduced, resulting in an increase in the drift velocity, w, of the electrons in the gas mixture for a range of E/P (pressurereduced electric field) values.

TL;DR: A comprehensive review of the production and use of beams of protons, deuterons and heavier ions with spot sizes as small as 2 μm is given in this article, where the formation of such beams either by collimation or by focusing is described.

TL;DR: In this paper, the authors demonstrate that a detectable sonic signal is produced by energetic proton beams while traversing a fluid medium, and the observed acoustic wave agrees with the predictions of a thermal expansion model.

TL;DR: In this article, the performances of diamond nuclear radiation detectors have been investigated using alpha and beta particles, and an energy for electron-hole pair creation of 13.19 eV has been determined for alpha particles in the 5-6 MeV energy range.

TL;DR: In this paper, the thermo-acoustic mechanism of sound generation by charged particles is analyzed and the general procedure for calculating the fields of such acoustic radiation has been developed, which is in good agreement with the data of experiments on charged-particle beams.

TL;DR: In this paper, a review of the timing properties of scintillators and photomultipliers as well as theoretical and experimental studies of time resolution is presented, where the influence of the light collection process and the self-absorption process on the light pulse shape are discussed.

TL;DR: The mechanism of photon emission in the rare-gas proportional scintillation counter was ascribed to the radiative de-excitation of excited molecules, R 2 ∗ →R+R+hv, by determining emission spectra experimentally as mentioned in this paper.

TL;DR: In this paper, the optimum geometry for strip cathodes or grids in MWPC for avalanche localization along the anode wires through measurement of induced pulses is calculated, and the resolution limits due to electronic noise are established as a function of the required time resolution.

TL;DR: In this article, the authors reviewed the history, crystal growth, and fabrication of CdTe and HgI2 room-temperature semiconductor gamma radiation detectors and described the theory of operation, including energy resolution limitations, trapping, polarization, uniformity and mode of operation.

TL;DR: In this paper, an unusual chargemultiplication mechanism in gases, mainly photon-mediated, that allows a controlled avalanche spread in a parallel-plate chamber was investigated, which provided remarkable energy, time, and position resolution both for soft X-rays and for charged particles.

TL;DR: In this article, a curved crystal spectrometer was used to obtain high-precision γ-ray energies below 1 MeV of fission product lines arising from neutron capture in 235 U and 239 Pu produced in in-pile targets of 234 U and 238 U, respectively.

TL;DR: In this paper, the 13 MeV protons emitted at 165° for E3He=700 keV were detected using a 1500 μ deep silicon surface barrier detector with a measured overall resolution of 17 keV (fwhm).

TL;DR: In this paper, the basic properties of tubes with thick sense wires (40-200 μm) operated in the limited streamer mode are discussed, together with the influence of various parameters such as wire diameter, tube shape and dimensions, gas mixtures.

TL;DR: In this paper, a set of stopping power equations deduced from a basic stopping power equation of Bohr were used for the calculation of the mean ionization potentials of the elements.

TL;DR: In this article, the relation of the most important properties of a multi-wire structure to the underlying physical phenomena has been discussed, including the electrostatic properties of the structure, the charge distribution induced on the different electrodes and the relative intensity of the electric fields.

TL;DR: In this paper, the saturated resonance technique was applied more accurately ( 197 Au(n,γ) peak by a least-squares procedure, which was applied to the least squares procedure.

TL;DR: In this article, the authors presented experimentally measured track-lengths of the fission products from 252Cf in three solid state track detectors (mica, Lexan and cellulose acetate).

TL;DR: In this article, the size of the start-time detector was reduced considerably by the use of carbon foils of few micrograms/cm square in thickness combined with microchannel plates for detecting secondary electrons.

TL;DR: In this paper, a measurement of the analogue centre of gravity of the induced charge distribution on cathode planes of multi-wire proportional chambers allows the localization, in two dimensions, of the ionizing event.

TL;DR: In this article, the ionization loss of relativistic charged particles has been measured in thin samples of Ar, Xe, and propane in a pressurized gas proportional counter.