scholarly journals The silicon lattice defects in proton and gamma irradiated n-channel CCDs

2019 ◽  
Author(s):  
Anton Lindley-DeCaire ◽  
David Hall ◽  
Nathan Bush ◽  
Ben Dryer ◽  
Andrew Holland
Keyword(s):  
Lattice Defects ◽  
Silicon Lattice ◽  
Gamma Irradiated

Magnetic-Field-Induced Modification of Properties of Silicon Lattice Defects

2005 ◽  
Vol 108-109 ◽  
pp. 339-344 ◽  
Author(s):  
V.A. Makara ◽  
L.P. Steblenko ◽  
Yu.L. Kolchenko ◽  
S.M. Naumenko ◽  
O.A. Patran ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Lattice Defects ◽  
Structural Defects ◽  
Silicon Lattice ◽  
Silicon Crystals ◽  
Field Action

A possibility of magnetic-field-induced modification of structural defects in silicon crystals is studied. It is shown that magnetic field action essentially affects the structuredependent properties of Si (mechanical and electrophysical)

Magnetic-Field-Induced Modification of Properties of Silicon Lattice Defects

2005 ◽  
pp. 339-344
Author(s):  
V.A. Makara ◽  
L.P. Steblenko ◽  
Yu.L. Kolchenko ◽  
S.M. Naumenko ◽  
O.A. Patran ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Lattice Defects ◽  
Silicon Lattice

scholarly journals Charge Coupled Devices as Particle Detectors

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Dan A. Iordache ◽  
Paul E. Sterian ◽  
Ionel Tunaru
Keyword(s):  
High Sensitivity ◽  
High Energy ◽  
Lattice Defects ◽  
Polarization Degree ◽  
High Energy Particle ◽  
Physical Parameters ◽  
Huge Number ◽  
Particle Detectors ◽  
Silicon Lattice ◽  
Charge Coupled Devices

As it is well known, while the most important advantages of the charge coupled devices, as high energy particle detectors are related to their (a) extremely high sensitivity (very important for the underground laboratories, also) and (b) huge number of very small independent components (pixels) of the magnitude order of106, which allow the separate impressions of many different “signatures” of (silicon lattice defects produced by) these particles, their main disadvantages refer to the (a) difficulty to distinguish between the capture traps (of free electrons and holes, resp.) produced by the radiation particles and the numerous types of traps due to the contamination or dopants and (b) huge number of types of lattice defects due to the irradiation. For these reasons, this work achieves a state of art of the (i) main experimental methods and (ii) physical parameters intended to the characterization of the main types of traps embedded in the silicon lattice of CCDs. There were identified also some new physical parameters useful in this aim, as the polarization degree of capture cross-sections and the state character, as well as some new useful notions, as the trans-Fermi level capture states.

Contrast in Scanning Images of Thin Crystals

1972 ◽  
Vol 30 ◽  
pp. 520-521
Author(s):  
S. Kimoto ◽  
H. Hashimoto ◽  
S. Takashima ◽  
R. M. Stern ◽  
T. Ichinokawa
Keyword(s):  
Crystal Surface ◽  
Solid Angle ◽  
Incident Angle ◽  
Intensity Variation ◽  
Lattice Defects ◽  
Scanning Microscope ◽  
Electron Detector ◽  
Backscattered Electrons ◽  
Electron Image ◽  
Backscattered Electron

The most well known application of the scanning microscope to the crystals is known as Coates pattern. The contrast of this image depends on the variation of the incident angle of the beam to the crystal surface. The defect in the crystal surface causes to make contrast in normal scanning image with constant incident angle. The intensity variation of the backscattered electrons in the scanning microscopy was calculated for the defect in the crystals by Clarke and Howie. Clarke also observed the defect using a scanning microscope.This paper reports the observation of lattice defects appears in thin crystals through backscattered, secondary and transmitted electron image. As a backscattered electron detector, a p-n junction detector of 0.9 π solid angle has been prepared for JSM-50A. The gain of the detector itself is 1.2 x 104 at 50 kV and the gain of additional AC amplifier using band width 100 Hz ∼ 10 kHz is 106.

Crystal structure-size relationship in ultrafine metallic particles

1989 ◽  
Vol 47 ◽  
pp. 266-267
Author(s):  
Jun Liu ◽  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Ultrafine Particles ◽  
Carbon Film ◽  
Lattice Defects ◽  
Careful Examination ◽  
Seeded Growth ◽  
Gold Particles ◽  
Metallic Particles ◽  
Interfacial Structures ◽  
Typical Particle ◽  
Many Particles

Ultrafine particles usually have unique physical properties. This study illustrates how the lattice defects and interfacial structures between particles are related to the size of ultrafine crystalline gold particles.Colloidal gold particles were produced by reducing gold chloride with sodium citrate at 100°C. In this process, particle size can be controlled by changing the concentration of the reactant. TEM samples are prepared by transferring a small amount of solution onto a thin (5 nm) carbon film which is suspended on a copper grid. In this work, all experiments were performed with Philips 430T at 300 kV.With controlled seeded growth, particles of different sizes are produced, as shown in Figure 1. By a careful examination, it can be resolved that very small particles have lattice defects with complex interfaces. Some typical particle structures include multiple twins, resulting in a five-fold symmetry bicrystals, and highly disordered regions. Many particles are too complex to be described by simple models.

MÖSSBAUER STUDIES OF SOLUTE ATOM ASSOCIATED WITH LATTICE DEFECTS IN METALS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-571-C2-572
Author(s):  
Y. Ishida ◽  
T. Ozawa ◽  
H. Ichinose ◽  
K. Sassa ◽  
M. Taniwaki ◽  
...  
Keyword(s):  
Solute Atom ◽  
Lattice Defects ◽  
Mössbauer Studies

MÖSSBAUER SPECTRUM OF57Fe AND119Sn ASSOCIATED WITH LATTICE DEFECTS IN ALUMINIUM

1974 ◽  
Vol 35 (C6) ◽  
pp. C6-309-C6-313
Author(s):  
M. KATO ◽  
Y. ISHIDA ◽  
K. SASSA ◽  
S. UMEYAMA ◽  
M. MORI
Keyword(s):  
Lattice Defects ◽  
Mossbauer Spectrum ◽  
Mössbauer Spectrum

Presentation of Gamma-Irradiated-in-Air Polyethylene Wear in the Form of a Synovial Cyst

2003 ◽  
Vol 13 (5) ◽  
pp. 413-418
Author(s):  
Bryan T. Edwards ◽  
Patrick B. Leach ◽  
R. Scott Corpe ◽  
Robert D. Zura ◽  
Timothy R. Young
Keyword(s):  
Polyethylene Wear ◽  
Synovial Cyst ◽  
Gamma Irradiated

Employing Gamma Ray Irradiated Giardia lamblia as Trialed Vaccine in Experimental Animal

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Amal Kamil Abdul Sada ◽  
Amany Mohamed Al-Kaysi
Keyword(s):  
Giardia Lamblia ◽  
Gamma Ray ◽  
Age Groups ◽  
Active Phase ◽  
Study Groups ◽  
Negative Control ◽  
Control Group ◽  
High Dose ◽  
Histopathological Changes ◽  
Gamma Irradiated

This is an experimental trial to prepare a vaccine from gamma-irradiated Giardia lamblia which is evaluated in experimental animals. The study was conducted from December 2015 to April 2016. The field survey of the parasite was conducted from those patients attending the laboratories of the Alawi Children's Hospital in Rusafa and the Al-Yarmouk Teaching Hospital in Karkh, through which 1250 stool samples of different age groups were examined. Five groups of mice were used in the study; the first was injected with normal saline and considered as a negative control group, the second was injected with cystic form of non-irradiated Giardia lamblia and considered as a positive control group, whereas the other three groups were injected with gamma irradiated Giardia lamblia at three different doses 10, 15 and 25 rad respectively. Giardia lamblia was primarily cultivated in liver infusion agar for ten days to obtain the active phase. On the sixth day, the cystic phase was purified and standardized to be used in the infection of mice with or without the exposure of gamma rays. Mice showed high sensitivity to parasitic infestation, in the gamma non-irradiated and the irradiated with gamma 10 rad, and 15 rad irradiated groups which was 100%. The results expressed an excystation process of the depleted phases and the release of the feeder phases. The results of the three irradiated groups consisted of histopathological changes of the small, and the rectum by dissection after two weeks of infection, with intestine amputation lesions, as well as ulceration and inflammation of the inflammatory cells represented in small numbers of neutrophil, lymphocytes, and eosinophils. The presence of ulceration and fall of epithelial cells in the intestinal cavity has been shown, and different forms of the parasite have been observed. Mice which was injected with irradiated G lamblia at high dose (25 rad), not show and sensitivity to the challenge infection and no excystation of thy parasite had been done. After 2 wreaks, a comparison was achieved between all study groups in which no histopathological changes were noticed in the mice irradiated with dose of25 rad. After another two weeks, a challenge dose was given (un-attenuated G lamblia) and mice were dissected after another two weeks, no changes on the level of histopathology of intestinal tissue were noticed the results suggested that mice acquire an immunity against the parasite infection.

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