Natural Impact Detector

1998 ◽  
Vol 282 (5391) ◽  
pp. 1005o-1005
Keyword(s):  
1994 ◽  
Author(s):  
John P. Oliver ◽  
Charles G. Simon ◽  
William J. Cooke ◽  
S. F. Singer ◽  
Jerry L. Weinberg ◽  
...  

2018 ◽  
Vol 16 (38) ◽  
pp. 139-146
Author(s):  
Asmaa Ahmad Aziz

The research aims to evaluate the radioactivity in elected samples of cereals and legume which are wide human consumption in Iraq using Nuclear Track Detectors (NTDs) model CN-85.The samples were prepared scientifically according to references in this field. After 150 days of exposure, the detector were collected and chemically treated according to scientific sources (etching chemical), nuclear effects have been calculated using the optical microscope.Radon (222Rn) concentration and uranium (238U) were calculated in unit Bq/m3 and (ppm), the results indicate that the highest concentration of radon and uranium was in yellow corn where the concentration of radon was 137.17×102 Bq/m3 and uranium concentration 2.63 (ppm). The lowest concentration of radon and uranium was in Oats, where the concentration of radon was 24.27×102 Bq/m3, and uranium concentration 0.466 (ppm), concentrations of other cereals and legumes varied between these two values. These different in radon and uranium concentrations due to different in geological nature of the different agricultural soils, and the different absorption of plant roots for certain elements present in the soil solution. These values for the concentration of radon and uranium for cereals and legumes are within the permitted globally and as issued by the International Atomic Energy Agency (IAEA).


1984 ◽  
Vol 4 (9) ◽  
pp. 291-295 ◽  
Author(s):  
E. Grün ◽  
E. Bussoletti ◽  
A. Minafra ◽  
H. Kuczera ◽  
J.A.M. McDonell
Keyword(s):  

1985 ◽  
Vol 85 ◽  
pp. 129-129
Author(s):  
H. Kuczera ◽  
H. Iglseder ◽  
U. Weishaupt ◽  
E. Igenbergs

AbstractAn active detector is described which recently has been developed for laboratory impact measurements and which already has been proposed for cosmic dust flight experiments. The detector consists of a very thin penetration foil and an impact plate. By means of piezo detectors the elastic-wave propagation times between the impact location and the piezo detectors can be measured in the foil and in the target. The evaluation of these signals gives the time of the event, the impact location, the projectile velocity, the flight path direction and at least the order of magnitude of mass of the impacting particle. This type of sensor will meet all requirements for particle detection in the diameter range from a few microns (dust particles) up to approx. a few millimeters (space debris) at all velocities. Small-sized projectiles can be detected by sensitive amplifiers. Low-energy electronics including data storage can be used for triangulation and impact time calculation. First experimental results which have been achieved in the Munich Accelerator Facilities will be presented.


1998 ◽  
Author(s):  
Patrick J. Serna ◽  
Gary H. Liechty ◽  
Craig L. Neslen ◽  
Renzo Del Frate ◽  
Edwin Draper

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