scholarly journals On the ionization loss spectra of high-energy channeled negatively charged particles

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
S. V. Trofymenko ◽  
I. V. Kyryllin
Keyword(s):  
Numerical Simulation ◽  
Experimental Determination ◽  
Silicon Crystal ◽  
Charged Particles ◽  
High Energy ◽  
Crystal Thickness ◽  
Planar Channeling ◽  
Characteristic Parameters ◽  
Ionization Loss

Abstract The ionization loss spectra of high-energy negatively charged particles which move in the planar channeling mode in a silicon crystal are studied with the use of numerical simulation. The case when the crystal thickness is on the order of the dechanneling length $$l_d$$ld is considered. It is shown that in this case the shape of the spectrum noticeably depends on $$l_d$$ld. The evolution of various characteristic parameters of the spectrum with the change of $$l_d$$ld is investigated. A method of the experimental determination of $$l_d$$ld on the basis of the measurement of the ionization loss spectrum is proposed.

Experimental determination of residual stress in silicon nitride diffusion bonds obtained by high-energy X-ray diffraction

2004 ◽  
Vol 148 (1) ◽  
pp. 60-63 ◽  
Author(s):  
M. Vila ◽  
M.L. Martínez ◽  
C. Prieto ◽  
P. Miranzo ◽  
M.I. Osendi ◽  
...  
Keyword(s):  
Residual Stress ◽  
Silicon Nitride ◽  
Experimental Determination ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffusion Bonds

Experimental determination of the dose kernel in high-energy x-ray beams

1996 ◽  
Vol 23 (4) ◽  
pp. 505-511 ◽  
Author(s):  
Crister P. Ceberg ◽  
Bengt E. Bjärngard ◽  
Timothy C. Zhu
Keyword(s):  
Experimental Determination ◽  
High Energy ◽  
X Ray

Neutrino Physics

2021 ◽  
pp. 405-421
Author(s):  
J. Iliopoulos ◽  
T.N. Tomaras
Keyword(s):  
Neutrino Physics ◽  
Experimental Determination ◽  
High Energy Physics ◽  
Mass Matrix ◽  
High Energy ◽  
Light Neutrino ◽  
Weak Neutral Currents ◽  
Near Future ◽  
Energy Physics

Neutrinos offered the greatest surprises in high energy physics during the last decades. In this chapter we review the main milestones of this passionate history: the first neutrino beams which established the separate neutrino identities, the Gargamelle discovery of the weak neutral currents, the LEP determination of three light neutrino species and the discovery of the intriguing phenomenon of neutrino oscillations. The experimental determination of the neutrino mass matrix elements is still in progress with several experiments either taking data or planned for the near future. We end with the present theoretical puzzles and the experiments which may help to solve them.

scholarly journals Experimental Determination of Nucleation Scaling Law for Small Charged Particles

2007 ◽  
Vol 99 (19) ◽  
Author(s):  
Fabien Chirot ◽  
Pierre Labastie ◽  
Sébastien Zamith ◽  
Jean-Marc L’Hermite
Keyword(s):  
Experimental Determination ◽  
Scaling Law ◽  
Charged Particles

Experimental determination of the energy generated in nuclear cascades by a high energy beam

1995 ◽  
Vol 348 (3-4) ◽  
pp. 697-709 ◽  
Author(s):  
S. Andriamonje ◽  
A. Angelopoulos ◽  
A. Apostolakis ◽  
F. Attale ◽  
L. Brillard ◽  
...  
Keyword(s):  
Experimental Determination ◽  
High Energy ◽  
Energy Beam ◽  
High Energy Beam

Study of TaSi2-Si Crystals with High Energy Synchrotron Radiation as Tunable Wide-bandpass Monochromator and Analyzer Optics

2001 ◽  
Vol 678 ◽  
Author(s):  
U. Rütt ◽  
S.R. Stock ◽  
Z.U. Rek
Keyword(s):  
Synchrotron Radiation ◽  
Silicon Crystal ◽  
Incident Beam ◽  
High Energy ◽  
Crystal Thickness ◽  
Rocking Curve ◽  
Analyzer Crystal ◽  
Transmission Geometry ◽  
Integrated Intensity

AbstractSingle crystals of the in situ composite TaSi2-Si are candidates for wide bandpass monochromators and analyzers for x-ray experiments. Two large crystals (32 × 39 × 7 mm3 and 32 x 39 x 30 mm3) were studied in detail using 115 keV synchrotron radiation at the BESSRC beamline at the APS. For transmission geometry, the Si(111) reflection and 39 mm crystal thickness, rocking curve widths of 95 arc sec with reflectivities of 50% were measured over the entire crystal. Turning the crystal to an angle of 45° to the incident beam and translating it through the beam allowed investigation of the influence of crystal thickness on diffracted intensity. For sample thicknesses ranging between 5 mm and 12.5 mm, the full width at half maximum (FWHM) of the rocking curve increased linearly from 29 arc sec to 53 arc sec. The greatest gain in integrated intensity was obtained for 8-9 mm thickness where FWHM = 40 arc sec. If this crystal were used as a monochromator for synchrotron radiation, it would provide 40 times more intensity than a perfect silicon crystal and an energy bandwidth of 1 keV at 115 keV photon energy. With the increase of the rocking curve FWHM, a plateau across the peak maximum developed; its width increased from 5 arc sec to 25 arc sec when the crystal thickness increased from 5 mm to 12.5 mm, respectively. This plateau allows these crystals to be used as analyzer crystals in diffraction experiments, i.e., as very narrow slits to suppress background. A plateau width of about 5-20 arc sec for the analyzer crystal is needed to insure that the entire intensity scattered from a sample is delivered to the detector. The simple expedient of changing the crystal thickness alters the plateau width of the analyzer crystal and tunes its acceptance to the needs of the sample under study.

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