scholarly journals Demonstration of a single-crystal reflector-filter for enhancing slow neutron beams

2016 ◽  
Vol 830 ◽  
pp. 454-460 ◽  
Author(s):  
G. Muhrer ◽  
T. Schönfeldt ◽  
E.B. Iverson ◽  
M. Mocko ◽  
D.V. Baxter ◽  
...  
Keyword(s):  
Single Crystal ◽  
Slow Neutron ◽  
Neutron Beams

Slow-neutron distribution in polycrystalline and single-crystal silicon samples

1980 ◽  
Vol 49 (3) ◽  
pp. 646-648 ◽  
Author(s):  
O. N. Efimovich ◽  
S. P. Solov'ev ◽  
E. S. Stariznyi ◽  
A. A. Stuk ◽  
V. V. Sumin ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystal Silicon ◽  
Slow Neutron ◽  
Neutron Distribution ◽  
Crystal Silicon

scholarly journals Experimental confirmation of a new method for selective neutron separation

2020 ◽  
Vol 6 (4) ◽  
pp. 235-241
Author(s):  
Yuri V. Drobyshevsky ◽  
Ilya M. Anfimov ◽  
Valery A. Varlachev ◽  
Svetlana P. Kobeleva ◽  
Sergey A. Nekrasov ◽  
...  
Keyword(s):  
Neutron Flux ◽  
Single Crystal ◽  
Thermal Neutron ◽  
Single Crystal Silicon ◽  
Hydrogen Uptake ◽  
Experimental Confirmation ◽  
Crystal Silicon ◽  
Neutron Reflection ◽  
Neutron Beams ◽  
Integral Neutron

The article presents an experimental confirmation of the operability of neutron concentrators in devices that form and use directed high-intensity thermal neutron beams with elliptical channels made as blocks of profiled graphite and aluminum plates. The effect of neutron reflection from the surface of materials is the basis of a device capable of selecting neutrons by their directions in space. The study experimentally confirmed the efficiency of a moderating-focusing structure (MFS) based on a pack of elliptical neutron mirrors, which makes it possible to form oriented thermal neutron beams from the outgoing neutron flux. To record the effects of selective thermal neutron separation, silicon single-crystal wafers were used, due to which it was possible to obtain portraits of integral neutron fluxes in the reactor. The experiments were carried out in a horizontal experimental channel (HEC-4) at the IRT-T reactor of the National Research Tomsk Polytechnic University. The integral neutron flux was (2.3–3.02)·1017 cm–2. The neutron flux was detected by the change in the specific electrical resistivity of the single-crystal silicon wafers. The effect of concentration of thermal neutrons was recorded both on the block of graphite neutron mirrors and on the block of aluminum thin-walled elliptical mirrors. In the near future, on this basis, it will be possible to solve such problems as extending the reactor life by reducing the hydrogen uptake in the inner walls. In addition, the experiments have proved the possibility of creating anisotropic structures that lie outside the formalism of Liouville’s theorem, in which the surfaces of thermal neutron sinks are formed with subsequent concentration in the areas separated by aluminum or graphite plates.

XII.—The Hexapole Magnet as a Velocity Selector and Polarizer for Neutral Spin-½ Particles

1969 ◽  
Vol 68 (2) ◽  
pp. 158-184 ◽  
Author(s):  
H. M. Brash ◽  
D. M. Campbell ◽  
P. S. Farago ◽  
A. G. A. Rae ◽  
H. Chr. Siegmann ◽  
...  
Keyword(s):  
Particle Velocity ◽  
Neutral Atom ◽  
Slow Neutron ◽  
Neutron Beams ◽  
Atomic Beams ◽  
System Geometry

SynopsisThe general paraxial particle-optic properties of the hexapole field are summarized and lens formulae derived. Formulae are given for the transmission as a function of particle velocity and system geometry for geometries appropriate to the case of neutral atom beams and of slow neutron beams respectively. These formulae are used to evaluate the hexapole magnet as a velocity selector and polarizer for atomic beams and as a spin polarizer for neutron beams. Some experimental observations on potassium beams are quoted in support of the theory.

An optically polarised dense3He target as a spin filter for slow-neutron beams

2003 ◽  
Vol 33 (1) ◽  
pp. 18-24
Author(s):  
Nikolai N Kolachevsky ◽  
Yu V Prokof'ichev ◽  
V R Skoi ◽  
Igor I Sobel'man ◽  
Vadim N Sorokin
Keyword(s):  
Slow Neutron ◽  
Spin Filter ◽  
Neutron Beams

A single crystal slow neutron spectrometer at the pulsed reactor in Dubna

1967 ◽  
Vol 55 ◽  
pp. 151-156 ◽  
Author(s):  
J. Gordon ◽  
P. Pellionisz ◽  
I. Vizi ◽  
G. Zsigmond ◽  
A. Szkatula
Keyword(s):  
Single Crystal ◽  
Slow Neutron ◽  
Neutron Spectrometer ◽  
Pulsed Reactor

scholarly journals Characterization of Neutron Beam Applications

2020 ◽  
Vol 231 ◽  
pp. 05005
Author(s):  
Hirohiko M. Shimizu ◽  
Katsuya Hirota
Keyword(s):  
Neutron Scattering ◽  
Neutron Beam ◽  
Slow Neutron ◽  
Analytic Framework ◽  
Neutron Beams ◽  
Ongoing Effort

Analytic framework to quantitatively evaluate the performance of existing neutron scattering instruments would be valuable to find out new possibilities and potentials of slow neutron beams. A conceptual sketch of ongoing effort in Japan is described.

Studies of parity violation using polarized slow neutron beams

1988 ◽  
Vol 66 (6) ◽  
pp. 542-547 ◽  
Author(s):  
J. Alberi ◽  
R. Hart ◽  
E. Jeenicke ◽  
R. Ost ◽  
Richard Wilson ◽  
...  
Keyword(s):  
Parity Violation ◽  
Slow Neutron ◽  
Early Attempt ◽  
Polarized Beams ◽  
Neutron Beams ◽  
The Future ◽  
Slow Neutrons

In this paper we review the work that has been done on studies of parity violation in nucleon systems using polarized beams of slow neutrons, first describing an early attempt by Haas et al. (Phys. Rev. 116, 1211 (1959)) and ending with some suggestions and predictions for the future.

scholarly journals Focalizing slow neutron beams at and below micron scales and discussion on BNCT (II)

2019 ◽  
Vol 194 (10) ◽  
pp. 956-966
Author(s):  
Ignacio Molina de la Peña ◽  
María L. Calvo ◽  
Ramón F. Álvarez-Estrada
Keyword(s):  
Slow Neutron ◽  
Neutron Beams
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