scholarly journals Passive Low-Energy Nuclear-Recoil Detection with Color Centers

2021 ◽  
Vol 16 (6) ◽  
Author(s):  
Bernadette K. Cogswell ◽  
Apurva Goel ◽  
Patrick Huber
Keyword(s):  
Low Energy ◽  
Nuclear Recoil ◽  
Color Centers

scholarly journals Low energy electron and nuclear recoil thresholds in the DRIFT-II negative ion TPC for dark matter searches

2009 ◽  
Vol 4 (04) ◽  
pp. P04014-P04014 ◽  
Author(s):  
S Burgos ◽  
E Daw ◽  
J Forbes ◽  
C Ghag ◽  
M Gold ◽  
...  
Keyword(s):  
Dark Matter ◽  
Low Energy ◽  
Energy Electron ◽  
Nuclear Recoil ◽  
Negative Ion ◽  
Low Energy Electron

scholarly journals Direct dark matter research by observing electrons produced in neutralino-nucleus collisions

2019 ◽  
Vol 14 ◽  
pp. 19
Author(s):  
Ch. C. Moustakidis ◽  
J. D. Vergados ◽  
H. Ejiri
Keyword(s):  
Dark Matter ◽  
Elastic Scattering ◽  
Electron Energy ◽  
Ionization Rate ◽  
Low Energy ◽  
Nuclear Recoil ◽  
Important Process ◽  
Nuclear Collisions ◽  
Neutralino Mass ◽  
Direct Dark Matter

The most important process for directly detecting dark matter is the LSP-nucleus elastic scattering by measuring the energy of the recoiling nucleus. In the present work we explore a novel process that is the detection of the dark matter constituents by observing the low energy ionization electrons. We develop the formalism and apply it in calculating the ratio of the ionization rate to the nuclear recoil rate in a variety of atoms. The obtained ratios are essentially independent of all parameters of supersymmetry except the neutralino mass, but they crucially depend on the electron energy cut off. Based on our results it is both interesting and realistic to detect the LSP by measuring the ionization electrons following the-LSP nuclear collisions.

scholarly journals Low-Energy Physics Reach of Xenon Detectors for Nuclear-Recoil-Based Dark Matter and Neutrino Experiments

2019 ◽  
Vol 123 (23) ◽  
Author(s):  
B. G. Lenardo ◽  
J. Xu ◽  
S. Pereverzev ◽  
O. A. Akindele ◽  
D. Naim ◽  
...  
Keyword(s):  
Dark Matter ◽  
Low Energy ◽  
Nuclear Recoil ◽  
Neutrino Experiments ◽  
Energy Physics

Visible photoluminescence of color centers in lithium fluoride detectors for low-energy proton beam Bragg curve imaging and dose mapping

2019 ◽  
Vol 95 ◽  
pp. 109242 ◽  
Author(s):  
Rosa Maria Montereali ◽  
Massimo Piccinini ◽  
Alessandro Ampollini ◽  
Luigi Picardi ◽  
Concetta Ronsivalle ◽  
...  
Keyword(s):  
Proton Beam ◽  
Lithium Fluoride ◽  
Low Energy ◽  
Color Centers ◽  
Visible Photoluminescence ◽  
Energy Proton ◽  
Dose Mapping

Optical investigation of radiation-induced color centers in lithium fluoride thin films for low-energy proton-beam detectors

2019 ◽  
Vol 88 ◽  
pp. 580-585 ◽  
Author(s):  
Mauro Leoncini ◽  
Maria Aurora Vincenti ◽  
Francesca Bonfigli ◽  
Stefano Libera ◽  
Enrico Nichelatti ◽  
...  
Keyword(s):  
Thin Films ◽  
Proton Beam ◽  
Lithium Fluoride ◽  
Low Energy ◽  
Color Centers ◽  
Optical Investigation ◽  
Energy Proton ◽  
Radiation Induced

Dissociated Σ=27 boundaries in silicon

1988 ◽  
Vol 46 ◽  
pp. 624-625
Author(s):  
A. Garg ◽  
W.A.T. Clark ◽  
J.P. Hirth
Keyword(s):  
Electron Diffraction ◽  
Local Minimum ◽  
Boundary Energy ◽  
Coincidence Site Lattice ◽  
Boundary Plane ◽  
Low Energy ◽  
Theoretical Understanding ◽  
Site Lattice ◽  
Kikuchi Pattern ◽  
Analysis Techniques

In the last twenty years, a significant amount of work has been done in the theoretical understanding of grain boundaries. The various proposed grain boundary models suggest the existence of coincidence site lattice (CSL) boundaries at specific misorientations where a periodic structure representing a local minimum of energy exists between the two crystals. In general, the boundary energy depends not only upon the density of CSL sites but also upon the boundary plane, so that different facets of the same boundary have different energy. Here we describe TEM observations of the dissociation of a Σ=27 boundary in silicon in order to reduce its surface energy and attain a low energy configuration.The boundary was identified as near CSL Σ=27 {255} having a misorientation of (38.7±0.2)°/[011] by standard Kikuchi pattern, electron diffraction and trace analysis techniques. Although the boundary appeared planar, in the TEM it was found to be dissociated in some regions into a Σ=3 {111} and a Σ=9 {122} boundary, as shown in Fig. 1.

Transfer optics for high spatial resolution electron spectroscopy

1988 ◽  
Vol 46 ◽  
pp. 666-667
Author(s):  
G. G. Hembree ◽  
Luo Chuan Hong ◽  
P.A. Bennett ◽  
J.A. Venables
Keyword(s):  
Magnetic Field ◽  
Scanning Transmission Electron Microscope ◽  
Low Energy ◽  
Objective Lens ◽  
State University ◽  
Arizona State University ◽  
Initial Field ◽  
Resolution Electron ◽  
Scanning Transmission ◽  
Low Energy Electrons

A new field emission scanning transmission electron microscope has been constructed for the NSF HREM facility at Arizona State University. The microscope is to be used for studies of surfaces, and incorporates several surface-related features, including provision for analysis of secondary and Auger electrons; these electrons are collected through the objective lens from either side of the sample, using the parallelizing action of the magnetic field. This collimates all the low energy electrons, which spiral in the high magnetic field. Given an initial field Bi∼1T, and a final (parallelizing) field Bf∼0.01T, all electrons emerge into a cone of semi-angle θf≤6°. The main practical problem in the way of using this well collimated beam of low energy (0-2keV) electrons is that it is travelling along the path of the (100keV) probing electron beam. To collect and analyze them, they must be deflected off the beam path with minimal effect on the probe position.

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