Showing papers in "Nuclear Instruments and Methods in 1969"

TL;DR: In this article, a mathematical formalism for the representation of photopeaks and the continua in their vicinity is presented for computer analysis of γ-ray spectra from semiconductor detector systems.

TL;DR: Finite solid-angle corrections for Ge(Li) detectors have been calculated for source distances of 3.0, 5.0, 7.0 and 10.0 cm.

TL;DR: In this paper, a Fortran-based program written in Fortran IV is described which will least square fit experimental data points that are typically accumulated in measurements using a multichannel analyzer.

TL;DR: In this paper, a method for the computation of multicharged particle range-energy and energy loss relations for dielectric nuclear track detectors is described, which is useful in the energy interval 0.1-1200 MeV/nucleon for heavy ions in materials of known atomic composition.

TL;DR: In this article, the FERDoR unfolding method and code are used to transform the measured pulse-height distribution into a neutron spectrum, which produces an estimate of the neutron spectrum with a rigorous confidence interval.

TL;DR: In this paper, it was found that the restricted energy loss rate of charged particles can be used as a convenient criterion to predict the formation or non-formation of etchable tracks in plastics.

TL;DR: In this article, a method for investigation of the surface layers composition and structure is described, using the conversion electrons emitted after recoilles absorption of gamma-rays, which depends on the thickness of the layer the electrons pass across.

TL;DR: In this article, a leaky discriminator is proposed for multichannel analyzers to permit effective usage of two-pulser spectrum stabilization. But it is not suitable for counting at high counting rates.

TL;DR: In this article, the relative intensities of the prominent transitions present in the decay of 152g, 154Eu, 56Co, 110mAg and 125Sb have been calculated with very high precision.

TL;DR: A computer method for automatically identifying the peaks in complex spectra and determining their centers and areas using a data smoothing technique employing Fourier transforms and makes identification of maxima using a zero slope criterion possible.

TL;DR: In this article, a Monte Carlo program has been written which uses the Lindhard theory for heavy ion stopping powers to compute the attenuated γ-ray line shapes observed in the Doppler shift attenuation method of measuring nuclear lifetimes.

TL;DR: In this paper, the effects of carrier trapping on the spectrum from semiconductor gamma-ray spectrometers are reviewed and the physical models used in these theories are re-examined and a new theory is presented which predicts quite different effects.

TL;DR: In this paper, the pulse-height distributions produced by monoenergetic electrons incident perpendicularly on silicon detectors are described by means of measurements as well as Monte Carlo calculations response functions.

TL;DR: In this paper, a method has been described to analyze the pure quadrupole spectra measured in nuclear gamma-ray resonance experiments, which does not require complex diagonalization routines, and the resonance line positions and their intensities have been expressed as polynomials in the asymmetry parameter η, for various excited and ground state nuclear spins.

TL;DR: In this paper, the effects of several perturbations on a 2N-pole magnet are investigated, including modification of the shape of a pole, error excitation, displacement, and rotation of the pole.

TL;DR: In this article, a method for automatically locating the structure, e.g., peaks, in experimental data through application of the cross-correlation function is presented, which is used for automatic data analysis.

TL;DR: In this article, a new type of preamplifier is described that promises a significant improvement in the energy resolution of semiconductor detector spectrometers, achieving a total electronic contribution to the resolution of about 150 eV (fwhm-silicon).

TL;DR: In this article, the authors reproducibly obtained dynamic proton polarizations around 40% in 5 cm 3 samples made of 95% 1-butanol and 5% water mixtures, saturated with the free radical porphyrexide, at temperatures close to 1°K in a magnetic field of 25 kOe.

TL;DR: In this paper, the absolute scintillation efficiency of granular and glass neutron scintillators has been measured by activating the scinterators in a parallel collimated thermal neutron beam.

TL;DR: In this paper, two high-efficiency neutron detectors which consist of arrays of 3He proportional counters imbedded in polyethylene moderators were investigated, which achieved an intrinsic efficiency of (115±05)% over the neutron energy range from 25 keV to ⪆ 4 MeV.

TL;DR: In this paper, a new algorithm for the computation of the energy dissipated by normally incident, monoenergetic electron beams, provides good agreement with experimental data and with the computations of Spencer.

TL;DR: In this paper, the number of nuclear inelastic interactions of stopping protons in various materials has been calculated using the latest reaction cross-sections, and the results are compared with experimental measurements of this effect in silicon, sodium iodide and plastic scintillator.

TL;DR: In this paper, a program for the analysis of gamma-ray spectra obtained with Ge(Li) spectrometers is described, where the region of the pulse height spectrum about each full energy peak is fitted to an analytic function using a least squares computer code.

TL;DR: The helium-jet recoil transport method has been improved for the study of nuclei with half-lives less than 1 msec as discussed by the authors, and the effects of the thermalizing medium, turbulence and properties of the gas jet on the collection speed and efficiency have been studied using short-lived α-emitters produced in heavy ion reactions.

TL;DR: In this paper, the relative efficiency to monoenergetic γ-rays of coaxial and planar Ge(Li) detectors has been calculated with the aid of a Monte Carlo computer program.

TL;DR: In this paper, experimental measurements and calculations of the response of thallium activated sodium iodide to electrons and gamma-rays are assessed and it is concluded that in spite of generally good agreement between measurements of electron response, it is still not possible to make good quantitative calculations of intrinsic line-width in scintillation counters.

TL;DR: In this paper, the intensities of the γ transitions per α decay in the energy interval between 50 keV and 325 keV have been accurately measured, according to the different nuclide to be studied.

TL;DR: In this article, a semi-empirical method was given to obtain the relative full-energy peak efficiency ϵγ of a Ge(Li) diode over the γ-ray energy range 50 to 1400 keV.

TL;DR: In this article, a number of oriented UCAR graphite of various thicknesses and mosaic widths have been investigated for reflectivity of thermal neutrons, and the observed values agree rather well with those calculated on the assumption of ideally imperfect samples.

TL;DR: In this paper, a detection system capable of analyzing simultaneously (γ, n), (γ 2n, (γ 3n) and (γ 4n) interaction is described.