Photoionization investigation of defect traps in mercuric iodide room-temperature x-ray spectrometers

1994 ◽  
Author(s):  
John M. Van Scyoc III ◽  
T. S. Gilbert ◽  
Tuviah E. Schlesinger ◽  
Ralph B. James
Keyword(s):  
Room Temperature ◽  
Mercuric Iodide ◽  
X Ray

The Fabrication of Mercuric Iodide Detectors for Use in Wavelength Dispersive X-Ray Analysers and Backscatter Photon Measurements

1982 ◽  
Vol 16 ◽  
Author(s):  
John H. Howes ◽  
John Watling
Keyword(s):  
Room Temperature ◽  
Gamma Ray ◽  
Surface Passivation ◽  
Electrical Contact ◽  
Scintillation Counter ◽  
Radiation Detectors ◽  
Nuclear Radiation ◽  
Gamma Ray Spectrometry ◽  
Mercuric Iodide ◽  
X Ray

ABSTRACTThis paper describes the fabrication of mercuric iodide nuclear radiation detectors suitable for X and gamma ray spectrometry at room temperature. The active area of the detectors studied are between 0.2 and 1.5cm sq and they are up to 0.5mm thick. The method of producing a stable electrical contact to the crystal using sputtered germanium has been studied. The X-ray resolution of a 1.5cm sq. area detector at 32 keV is 2.3 keV FWHM when operated at room temperature in conjunction with a time variant filter amplifier. A factor which is important in the fabrication of the detector is the surface passivation necessary to achieve a useful detector life.This type of detector has been used on a wavelength dispersive X-ray spectrometer for energy measurements between 10 and 100 keV. The advantages over the scintillation counter, more commonly used, is the improved resolution of the HgI2 detector and its smaller size. The analyser is primarily used for the detection of low levels of heavy metals on particulate filters. The detectors have also been used on an experimental basis for gamma ray backscatter measurements in the medical field.

The Gas Proportional Scintillation Counter as a Room-Temperature Detector For Energy-Dispersive X-Ray Fluorescence Analysis

1981 ◽  
Vol 25 ◽  
pp. 39-44 ◽  
Author(s):  
C. A. N. Conde ◽  
L. F. Requicha Ferreira ◽  
A. J. de Campos
Keyword(s):  
Room Temperature ◽  
Scintillation Counter ◽  
Fluorescence Analysis ◽  
Energy Dispersive ◽  
X Rays ◽  
Mercuric Iodide ◽  
X Ray ◽  
Temperature Detector ◽  
Portable Instruments ◽  
Physical Principles

AbstractA review of the basic physical principles of the gas proportional scintillation counter is presented. Its performance is discussed and compared with that of other room-temperature detectors in regard to applications to portable instruments for energy-dispersive X-ray fluorescence analysis. It is concluded that the gas proportional scintillation counter is definitely superior to all other room-temperature detectors, except the mercuric iodide (HgI2) detector. For large areas or soft X-rays it is also superior to the HgI2 detector.

A Study of Low-Noise Preamplifier Systems for Use with Room Temperature Mercuric Iodide (Hgi2) X-Ray Detectors

1981 ◽  
Vol 28 (1) ◽  
pp. 579-582 ◽  
Author(s):  
J. S. Iwanczyk ◽  
A. J. Dabrowski ◽  
G. C. Huth ◽  
A. Del Duca ◽  
W. Schnepple
Keyword(s):  
Room Temperature ◽  
Low Noise ◽  
Mercuric Iodide ◽  
X Ray ◽  
Low Noise Preamplifier

scholarly journals Study of low noise preamplifier systems for use with room temperature mercuric iodide (HgI/sub 2/) x-ray detectors

1980 ◽  
Author(s):  
J.S. Iwanczyk ◽  
A.J. Dabrowski ◽  
G.C. Huth ◽  
A. Del Duca ◽  
W. Schenpple
Keyword(s):  
Room Temperature ◽  
Low Noise ◽  
Mercuric Iodide ◽  
X Ray ◽  
Low Noise Preamplifier

X-Ray Fluorescence Analysis at Room Temperature with an Energy Dispersive Mercuric Iodide Spectrometer

1979 ◽  
Vol 23 ◽  
pp. 249-256
Author(s):  
M. Singh ◽  
A.J. Dabrowski ◽  
G.C. Huth ◽  
J.S. Iwanczyk ◽  
B.C. Clark ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fluorescence Analysis ◽  
Low Energy ◽  
Cryogenic Cooling ◽  
Energy Dispersive ◽  
Entrance Window ◽  
X Rays ◽  
Mercuric Iodide ◽  
X Ray ◽  
Present Design

We have previously reported on the uniqueness and potential of room-temperature spectrometry of low-energy x-rays with a mercuric iodide (HgI2) detector (1,2,3). In this paper we emphasize the use of HgI2 detectors for x-ray fluorescence (XRF) analysis.Because no vacuum plumbing or cryogenic cooling is required, the design of a mercuric iodide room-temperature x-ray spectrometer is extremely simple. Our present design consists of coupling a detector directly to the first-stage FET in a modified Tennelec 161 D preamplifier and making the configuration “light-tight”. Aside from providing a suitable entrance window, there are no other requirements for routine spectroscopy.

X-Ray Fluorescence Analysis at Room Temperature with an Energy Dispersive Mercuric Iodide Spectrometer (1)

1980 ◽  
pp. 249-256 ◽  
Author(s):  
M. Singh ◽  
A. J. Dabrowski ◽  
G. C. Huth ◽  
J. S. Iwanczyk ◽  
B. C. Clark ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fluorescence Analysis ◽  
Energy Dispersive ◽  
Mercuric Iodide ◽  
X Ray

Growth of mercuric iodide platelets for X-ray room temperature detectors in the HgI2–HI–H2O system

2000 ◽  
Vol 217 (3) ◽  
pp. 263-270 ◽  
Author(s):  
L Fornaro ◽  
L Luchini ◽  
M Köncke ◽  
L Mussio ◽  
E Quagliata ◽  
...  
Keyword(s):  
Room Temperature ◽  
Mercuric Iodide ◽  
X Ray

Performance of Room Temperature Mercuric Iodide (Hgi2) Detectors in the Ultralow-Energy X-Ray Region

1981 ◽  
Vol 28 (1) ◽  
pp. 535-540 ◽  
Author(s):  
Andrzej J. Dabrowski ◽  
Jan S. Iwanczyk ◽  
Jeffrey B. Barton ◽  
Gerald C. Huth ◽  
Richard Whited ◽  
...  
Keyword(s):  
Room Temperature ◽  
Mercuric Iodide ◽  
X Ray ◽  
Ultralow Energy

Background and Sensitivity Considerations of X-ray Fluorescence Analysis with a Room-Temperature Mercuric Iodide Spectrometer

1981 ◽  
pp. 337-343 ◽  
Author(s):  
M. Singh ◽  
B. C. Clark ◽  
A. J. Dabrowski ◽  
J. S. Iwanczyk ◽  
D. E. Leyden ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fluorescence Analysis ◽  
Mercuric Iodide ◽  
X Ray
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