Visualization of Radioactive Sources Without Gamma-Radiation With UV Imaging Systems

2009 ◽  
Author(s):  
Oleg Ivanov ◽  
Alexey Danilovich ◽  
Vyacheslav Stepanov ◽  
Sergey Smirnov ◽  
Anatoly Volkovich
Keyword(s):  
Gamma Radiation ◽  
Spectral Region ◽  
Imaging Systems ◽  
Measurement Time ◽  
Moving Targets ◽  
Atmospheric Air ◽  
Output Image ◽  
Uv Imaging ◽  
Near Ultraviolet ◽  
Ultraviolet Wavelength

New UV cameras are suitable for imaging of α-contamination by fluorescence of atmospheric air the near ultraviolet (wavelength — 280 – 390 nm) region. Their parameters are: FOV for detecting in UV spectral region is 8° × 6°. The optical FOV is about 48° × 36°. DayCor SUPERB UV camera has sensitivity 3×10−18 W/cm2 enables detection and displaying corona emission as weak as 1.5 pC at distance 8 m, and capture moving targets without smearing the output image. Instruments sensitivity for alpha contamination registration in terms of minimum measurable activities (MMA) have been estimated as, 40–100 Bq/cm2 (measurement time is 3600–600 sec correspondently).

scholarly journals Bioconjugatable, PEGylated hydroporphyrins for photochemistry and photomedicine. Narrow-band, red-emitting chlorins

2016 ◽  
Vol 40 (9) ◽  
pp. 7721-7740 ◽  
Author(s):  
Mengran Liu ◽  
Chih-Yuan Chen ◽  
Amit Kumar Mandal ◽  
Vanampally Chandrashaker ◽  
Rosemary B. Evans-Storms ◽  
...  
Keyword(s):  
Spectral Region ◽  
Narrow Band ◽  
Fluorescence Band ◽  
Near Ultraviolet

PEGylated chlorins are soluble in water, can be excited in the near-ultraviolet, and exhibit a relatively narrow fluorescence band in the red spectral region.

A Search for Pulsed Gamma Emission from Two Pulsars

1969 ◽  
Vol 1 (6) ◽  
pp. 286-288 ◽  
Author(s):  
J. G. Ables ◽  
J. M. Durdin ◽  
A. G. Gregory ◽  
B. J. Stone
Keyword(s):  
Gamma Radiation ◽  
Northern Hemisphere ◽  
Gamma Emission ◽  
Atmospheric Air ◽  
Air Shower

We have recently used the atmospheric air-shower Cerenkov technique in an attempt to observe pulsed gamma radiation from two southern pulsars, PSR 0833—45 and MP 0959. Northern hemisphere observers do not agree whether the pulsars CP 0950, CP 1133 and CP 1919 are sources of gamma emission, either pulsed or uniform in time.

scholarly journals Limits from the FUNK experiment on the mixing strength of hidden-photon dark matter in the visible and near-ultraviolet wavelength range

2020 ◽  
Vol 102 (4) ◽  
Author(s):  
Arnaud Andrianavalomahefa ◽  
Christoph M. Schäfer ◽  
Darko Veberič ◽  
Ralph Engel ◽  
Thomas Schwetz ◽  
...  
Keyword(s):  
Dark Matter ◽  
Wavelength Range ◽  
Near Ultraviolet ◽  
Ultraviolet Wavelength

Phase Aberration Correction Using Echo Signals from Moving Targets I: Description and Theory

1992 ◽  
Vol 14 (2) ◽  
pp. 97-110 ◽  
Author(s):  
D. Zhao ◽  
L. N. Bohs ◽  
G. E. Trahey
Keyword(s):  
Image Quality ◽  
Quality Factor ◽  
Human Tissue ◽  
Theoretical Basis ◽  
Acoustic Velocity ◽  
Imaging Systems ◽  
Moving Targets ◽  
Phase Aberration ◽  
Novel Technique ◽  
Flowing Blood

Inhomogeneous acoustic velocity in human tissue introduces phase aberration in ultrasonic imaging systems and degrades image quality. A novel technique that employs echo signals from moving diffuse targets, such as flowing blood, as an image quality factor to compensate for phase aberration is described. Such signals can be obtained by subtracting the images of two consecutive target interrogations. The fundamental statistics of the quality factor and other related parameters are developed to provide a theoretical basis for the technique.

Temperature-dependent formaldehyde cross sections in the near-ultraviolet spectral region

1990 ◽  
Vol 94 (10) ◽  
pp. 3902-3908 ◽  
Author(s):  
Chris A. Cantrell ◽  
James A. Davidson ◽  
Anthony H. McDaniel ◽  
Richard E. Shetter ◽  
Jack G. Calvert
Keyword(s):  
Cross Sections ◽  
Spectral Region ◽  
Temperature Dependent ◽  
Near Ultraviolet ◽  
Ultraviolet Spectral Region
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