Showing papers in "Nuclear Instruments and Methods in 1968"

TL;DR: In this paper, the properties of planes of independent wires placed between two plane electrodes have been investigated, and it has been shown that each wire works as an independent proportional counter down to separations of 0.1 cm between wires.

TL;DR: In this article, the absolute differential efficiency of liquid organic scintillators was determined for nearly monoenergetic neutrons at 20 energies between 0.2 and 22 MeV incident on the curved side of the detector.

TL;DR: The average energy expended for electron-hole pair generation in silicon and germanium lithium-drifted detectors by gamma rays, electrons, and alpha particles has been measured as a function of temperature as discussed by the authors.

TL;DR: In this paper, the Compton scattering of monoenergetic beams of gamma rays and neutrons was used to induce the charged particles to recoil with specific energies in the interiors of the scintillators.

TL;DR: In this paper, the energy straggling distributions of non-relativistic heavy particles passing through a homogeneous absorber are determined for energy losses of up to 80% of the initial particle energy.

TL;DR: In this paper, the constant fraction of pulse height trigger has been shown to provide the optimum time resolution with a scintillator-photomultiplier system, and a circuit suitable for general use is presented.

TL;DR: In this article, a straggling distribution based on expansions into higher moments is examined for particle energy losses and is shown to break down for proton energy losses of over 80% due to particles being stopped completely.

TL;DR: In this article, a partial wave analysis of inelastic electron scattering is carried out for electric and magnetic multipole excitations of the nucleus and the results of this analysis which includes the effects of energy loss and Coulomb retardation have been programmed for the computer.

TL;DR: In this article, a Monte Carlo intranuclear-cascade model was used to predict the multiplicities of the particles emitted following meson capture and the residual nuclei remaining after the reaction.

TL;DR: An experimental test of a mechanical correlation chopper is described in this article, where it is concluded that the correlation choppers is superior to conventional choppers in cases for which the signal to background ratio is low.

TL;DR: In this article, a set of self-consistent and precise standard energies for use in nuclear spectroscopy has been developed for the principal gamma rays of 24Na, 56Co, 88Y, 124Sb, 137Cs, 140La and 208Tl.

TL;DR: In this paper, a compact proportional counter with a spherical cathode and a thin wire anode along a diameter of the sphere is constructed, and the electric field is made constant along the length of the anode by balancing the field variations due to the spherical cathodes against those resulting from the presence of the wire supports.

TL;DR: In this article, the present state of the theory of proportional counter resolution is reviewed and it is shown that anode wire uniformity is a critical factor and that window effects are of litte importance.

TL;DR: In this article, two versions of a Penning ion source were investigated to extract negatively charged ions either axially or radially, and the operating conditions were investigated by measurements with Langmuir probes in the positive column of the discharge.

TL;DR: In this article, a fast accurate circuit for pulse shape discrimination is described, and the results obtained with the liquid scintillator NE213 are presented Its γ rejection ratio remains better than 1000: 1 for neutron energies down to 50 keV.

TL;DR: In this paper, the scintillation detector used in the earlier spherical moderator assembly has been replaced by a small spherical proportional counter, filled with 3 He gas, and this improved the gamma rejection properties, particularly at the higher gamma energies (E γ 3.5 MeV) where the earlier detector was particularly sensitive.

TL;DR: In this article, the absolute energy spectra were measured for thick-target bremsstrahlung produced by incident electrons in the energy range of from 5.3 to 20.9 MeV.

TL;DR: In this article, a laser linac with grating is proposed for the miniaturizing of accelerators, where a metal grating was used as periodic structure of the linac and as a reflector of a resonator of a laser device.

TL;DR: In this paper, the effects of fast neutron bombardment on Ge(Li) gamma-ray detectors have been investigated at neutron energies of 1.10, 5.75 and 16.49 MeV.

TL;DR: In this article, the attainable efficiency and the background sensitivity of a thermal neutron detector are reported, due to the measurement of conversion electrons produced by the prompt neutron capture γ-rays in Gd (natural Gd and 157 Gd).

TL;DR: In this article, the possibilities of registering and discriminating the products of the reactions D+D and D+T in cellulose nitrate and cellulose acetate track detectors were studied.

TL;DR: In this paper, the separation and resolution for particle identification was measured for stilbene, Ne 213 and anthracene using zero cross-over techniques for scintillators.

TL;DR: In this article, the authors measured the scintillation of ZnO:Ga by α-particles and showed that α particles show a greater light output than plastic organic scintillators with a decay time of 0.4 ± 0.15 nsec.

TL;DR: In this article, the pulse height distribution of a silicon semiconductor counter was measured for monoenergetic electrons in the energy range from 300 to 1200 keV at angles of incidence from 15° to 90°.

TL;DR: The proton total reaction cross section of silicon has been measured to be 732 ± 20mb at 28 ± 1MeV as mentioned in this paper, which is in excellent agreement with direct measurements of the efficiency of silicon detectors.

TL;DR: In this paper, several methods are discussed to reduce the number of amplifiers required for the readout of a proportional multiwire chamber, where the plane of wires is built as a lumped delay line and the difference in the arrival time of the pulse at the two ends of the line determines the position of the active wire.

TL;DR: In this article, a quantitative investigation of electron scatter from Si semiconductor detectors over the energy range 50 −625 keV has been made, where the electron scatter coefficient, p, was determined in the usual way from the areas under the line and the so-called "low energy tail" which constitute the observed spectrum when mono-energetic electrons fall on a detector.

TL;DR: In this paper, a fast logic system was developed to remove the spectrum distortions produced by piled-up pulses by rejecting the piled up pulses. But this system was not suitable for the counting of nuclear radiations.