Showing papers in "Nuclear Instruments and Methods in 1973"

TL;DR: In this paper, renewal theory is applied to counting processes and the interval distribution is distorted by the presence of a dead time, and the resulting counting statistics are used to determine the resulting count statistics.

TL;DR: In this paper, the minor and major axes of track-pits of nuclear particles registered in dielectric solids are gradually varying in the course of the etching process.

TL;DR: In this article, a variety of nuclear species can now be measured by 4 π βγ-coincidence methods making use of extrapolation procedures, but without requiring detailed knowledge of decay scheme parameters.

TL;DR: A gamma ray telescope using the double Compton process is described in this paper, which measures extraterrestrial gamma ray fluxes in the energy range 1-10 MeV. The detector consists of two large plastic scintillator blocks, 1.20 m apart, with an opening half angle of 15° (hwhm) with an energy resolution of ±20% and an absolute detection efficiency of about 0.5%.

TL;DR: In this paper, the concept of a proper flip and a nonproper flip is introduced for spin 1 2 and spin 1 1 analyzing tensors with a view to the control or elimination of first-order systematic errors which may arise from misalignments of various types.

TL;DR: In this paper, the ion optical properties of the Munich Q3D-spectrograph were investigated using a special experimental ray tracing method, where Cs+-ions produced in a thermal ion source were accelerated by means of a very stable dcvoltage and focused on the object point of the spectrograph (spot size 0.2 × 2 mm2).

TL;DR: In this paper, the authors investigated the properties and determining precision detection efficiencies of semiconductor Si(Li), Ge(Li) and intrinsic Ge photon detectors in the energy range 3 to 100 keV.

TL;DR: The resonance at 0.83 MeV (center-of-mass energy) in the nuclear reaction has been used to measure hydrogen depth profiles in solids as mentioned in this paper, and several other resonant nuclear reactions are suggested for depth distribution studies of hydrogen and other elements.

TL;DR: In this paper, a simple theoretical model based on diffusion and space charge limited current erosion of the track is described and results in the expression t p = 1.32 × 10 −10 (n 1 E) 1 3 /F for a silicon detector where F is the electric field in the detector at the position of a track, n 1 is the linear carrier density in the track and E is the particle energy.

TL;DR: The sensitivity of particle and photon excitation methods of X-ray fluorescence have been compared for the analysis of trace elements in environmental samples in this article, and the analysis sensitivity for comparing different methods of excitation has been shown to be proportional to the square root of the product of the peak-to-background ratio at the Xray energy of interest and the peak to total ratio.

TL;DR: A three Ge(Li) Compton polarimeter has been constructed, and its sensitivity to γ-ray linear polarisation determined in the energy range 0.4 to 4.4 MeV as mentioned in this paper.

TL;DR: In this article, the nuclear reaction 16O(d,α)14N induced by 900 keV deuteron bombardment has been used in concentration profile measurements of oxygen in oxide surface layers.

TL;DR: In this article, a surface ionization ion source is described, which operates by heating a capped tungsten crucible to 2800-3300°C by electron bombardment.

TL;DR: In this article, the evolution of etched tracks in dielectric nuclear track detectors is considered for the case of normally incident particles taking into account the general case of variable track etch rate.

TL;DR: In this paper, the delta-ray theory of the inactivation of cells by energetic heavy ions is extended to the cellular track-width regime, where even cells which are not intersected by the ion's path are activated, by energetic delta-rays.

TL;DR: In this article, a system for the detection of secondary electrons which are emitted when ions pass through foils was described for detecting heavy ions in a similar way as a d E /d x -detector.

TL;DR: In this paper, a compilation of formulae for the calculation of the bremsstrahlung spectrum for electron energies above 30 MeV is presented, where the Bethe-Heitler extreme relativistic theory with intermediate screening and Coulomb correction is used with a correction for the finite Z-dependent intensity at the endpoint.

TL;DR: In this paper, a brief review of efficiency calibration techniques for Ge(Li) detectors is given, and the necessity for precise interpolation between absolute efficiencies measured at specific energies is discussed.

TL;DR: In this paper, a method for the construction of drift multi-wire proportional chambers with adjustable electric field suitable for the detection of high-energy charged particles in strong magnetic fields was proposed.

TL;DR: In this article, the authors compared NCMET with BFS, Phase-shift, and Hanle experiments within 11% in terms of allowed and forbidden transition probabilities for all 2s22pn→2s2pn+1 transitions.

TL;DR: In this paper, it was shown that the common analysis of TDPAC measurements and of Mossbauer spectra taken in imperfect crystal lattices leads to an electric field gradient asymmetry parameter η which deviates considerably from that of the ideal crystal.

TL;DR: In this paper, a Compton-suppression spectrometer is described, consisting of a NaI(Tl) crystal (⊘ 254 mm, length 229 mm) and a 15% closed-end Ge(Li) detector.

TL;DR: In this paper, an experimental apparatus was described for studying channeling in a clean environment at temperatures as low as 25 K. The target is mounted on a standard 2-axis goniometer and is almost completely surrounded by a large cryoshield at 20 K.

TL;DR: In this paper, the reliability and behaviour of various types of heavy ion sources are described in terms of general design considerations and of the choice of possible constructional materials, and various problems associated with the chemical and metallurgical reactions, which seriously influence the performance of the sources are discussed.

TL;DR: By measuring the center of gravity of the pulses induced on cathode strips in a multi-wire proportional chamber, it was shown that a good two-dimensional accuracy can be reached, of the order of 150 μm as mentioned in this paper.

TL;DR: In this article, the beam-foil spectra of silicon, sulfur and argon have been observed in the vacuum ultraviolet and their lifetimes have been measured and compared with other results.

TL;DR: A method to measure tritium produced in lithium by neutron irradiation is described in this article, which is a method used in the measurement of trite in lithium batteries and lithium batteries.

TL;DR: In this article, the authors used the theory of positon single and two-quanta annihilation in flight, the Fermi beta-decay theory, and theories of posititon energy loss in calculations of total probabilities of annihilation of positons in continuous spectra.

TL;DR: A survey of different theoretical approaches of avalanche formation in proportional counters is included in this article, with a brief survey of the different approaches to the detection of avalanches from a single pair of ions.

TL;DR: In this article, a review of methods and techniques used to obtain thin quantitative sources on both thin plastic and thick metallic backings for counting purposes is presented, and the qualities of the sources produced by these various methods are compared insofar as the available data allow.