Showing papers in "Nuclear Instruments and Methods in 1963"

TL;DR: In this paper, the effect of measurement errors and multiple scattering on the uncertainties in momenta and direction of bubble chamber tracks is reexamined, and it is shown that for measurement errors, clustering of measured points at the beginning, end, and center of the track leads to lower rms uncertainties.

TL;DR: A method is suggested to improve the differential linearity of analog-to- digital converters for multichannel pulse height analyzers and the method is explained for a feedback coding system.

TL;DR: In this paper, a method for the solution of experimental photonuclear yield functions for cross sections is presented, which gives the "smoothest" set of cross sections as a function of photon energy consistent with the experimental yield.

TL;DR: In this paper, a high resolution, electron impact ion source for electromagnetic isotope separators is described, and the source efficiency is high and the extracted ion beams appear to be virtually hash free.

TL;DR: In this paper, the method of Shirley et al. for interpreting Mossbauer spectrum areas is reformulated and extended to more general line shapes and applied to multiple line absorbers, provided that the contribution to the spectrum of a given absorber line is distinct.

TL;DR: In this paper, the induced charge in an ionization chamber is represented by DELTA q = e DELTA x/d (1) or DELTA Q =e DELTA V/V (2) where V = voltage across the device, d = spacing between electrodes, and DELTA v = potential difference between two points spaced DELTA X along the path of the charge e.

TL;DR: A survey of the techniques for measurement of sub-milli-mircosecond nuclear lifetimes by the delayed coincidence method is presented in this paper, where the time response and limitations of photomultiplier, plastic scintillator and associated electronics are discussed.

TL;DR: In this article, a two-dimensional display of this quantity versus the energy of the particle showed that separation could be obtained between deuterons and α-particles with energies in the range from 8 to 26 MeV.

TL;DR: In this article, a scintillation gamma ray detector is described whose efficiency for detecting neutron capture events depends only on the total gamma ray energy released, and the detector has a low background and a low sensitivity to neutrons in the energy range studied (up to ∼ 100 keV).

TL;DR: In this article, a focusing scheme for a broad-range magnetic spectrograph with photographic plate detection is proposed, which utilizes a homogeneous sector field with the point of entrance for the central rays placed on the extension of the straight line exit boundary.

TL;DR: In this paper, the performance of a Ga-doped, Li-drifted Ge detector (resolution = about 0.5%) used as a gamma spectrometer is detailed.

TL;DR: In this article, the shape of the Mossbauer line in a transmission-type experiment is extended to the case where both emission and absorption spectra are split by a hyperfine interaction, and the results indicate that the characteristics of the transmitted line are strongly dependent upon the spectral shape.

TL;DR: In this article, the peak resonance absorption and the width of the transmission velocity curves have been calculated for Mossbauer resonant source and absorber combinations in which the source and the absorber have different effective line widths.

TL;DR: In this paper, a target assembly and detection system is described for studying accelerator-produced short-lived alpha activities with good efficiency and excellent alpha particle resolution, which allows for the continuous recording of alpha particle spectra at the same time the activity is produced.

TL;DR: In this article, a semi-empirical range-energy-relation for electrons of the form R = AE[1 + B (1 + CE)−1] was derived, which is representing the known experimental data of electron ranges in the region 3 keV … 3 MeV with good accuracy.

TL;DR: In this article, the contribution of the photomultiplier noise of single electrons from the photocathode is discussed, and it is shown that although the overall resolution depends sensitively on the frequency distribution of singleelectron pulses, a statistical model can be formulated which leads to an expression for the shape of the ideal scintillation line.

TL;DR: In this paper, an amplitude discriminator circuit is described which is suitable for use with pulses from fast scintillation counters, where one part provides an output pulse which is closely synchronised to the input pulse over a wide range of amplitude.

TL;DR: In this article, a new approach is presented to the creation of vapour bubbles in superheated liquids by high ebergy charged particles, and the amount of heat necessary to create a bubble that can grow to visible size has been calculated for a number of practical cases.

TL;DR: In this paper, the total neutrons produced per alpha particle incident on the detector is given by the relation, N = (4π/ΔΦ)R, where R is the anisotropy factor.

TL;DR: In this article, the authors described the theory, design, and performance of a device which corrects zero and gain drifts of any origin in a gamma-ray scintillation spectrometer consisting of NaI(Tl) crystal and multichannel pulse-height analyzer.

TL;DR: In this article, the effect of source quality on the shape of the K 54.96 and the K 188.4 conversion lines from a wide variety of Xe 125 sources using momentum-resolution settings of ∽ 0.05% and ∽ 1.1% was examined.

TL;DR: In this article, a comparison between single-channel and multi-channel time analyzers for the nanosecond range is made and a classification of electronic time converters is offered in accordance with the three principles of operation primarily used, viz. start-stop principle, vernier principle and the pulse-overlap principle.

TL;DR: In this paper, the analysis of angular correlation data is described, in which measurements are made at a minimum number of properly chosen angles, assuming that the radiation studied is beam produced (in particular, a neutron capturegamma experiment).

TL;DR: In this article, the authors proposed a method for simultaneous registration of position and energy in a solid state radiation detector with suitable contacts, which produces pulses with a rise time depending on the position of the entering particle.

TL;DR: In this article, a Monte-Carlo calculation of the photofraction of NaI(Tl) detectors for gamma-rays between 2 and 100 MeV was presented.

TL;DR: In this paper, the authors proposed a method for simultaneous registration of position and energy in a solid-state radiation detector with suitable contacts, which produces pulses with a rise time depending on the position of the entering particle.

TL;DR: In this article, the principles of most of the usual methods of measuring magnetic fields are presented together with their domain of application; the accuracy attained and the present limitations of each method are given.

TL;DR: In this paper, a machine and a technique are described which allow to prepare samples with a diameter of up to 5 cm. The method has been applied to uranium, plutonium and boron.

TL;DR: In this article, a nonphotographic positioning of sparks is proposed, in which the charge from a condenser discharges to ground through the conductive channel produced by the spark and the grounded plate is connected to ground at two opposite points.