RADON MONITOR CALIBRATION USING NIST RADON EMANATION STANDARDS: STEADY FLOW METHOD

2004 ◽  
Author(s):  
P. Kotrappa
Keyword(s):  
Steady Flow ◽  
Radon Emanation ◽  
Flow Method ◽  
Radon Monitor

scholarly journals Radon monitor calibration using NIST radon emanation standards: steady flow method

2004 ◽  
Vol 113 (1) ◽  
pp. 70-74 ◽  
Author(s):  
P. Kotrappa ◽  
L. R. Stieff ◽  
P. Volkovitsky
Keyword(s):  
Steady Flow ◽  
Radon Emanation ◽  
Flow Method ◽  
Radon Monitor

Vapour pressure of isotopic solids by a steady flow method: Argon between 72 °K and triple point

1962 ◽  
Vol 23 (6) ◽  
pp. 1041-1053 ◽  
Author(s):  
G. Boato ◽  
G. Scoles ◽  
M. E. Vallauri
Keyword(s):  
Steady Flow ◽  
Triple Point ◽  
Vapour Pressure ◽  
Flow Method

scholarly journals Thoron emanation and exhalation of Slovenian soils determined by a PIC detector-equipped radon monitor

Nukleonika ◽  
2016 ◽  
Vol 61 (3) ◽  
pp. 379-384 ◽  
Author(s):  
Jácint Jónás ◽  
Zoltán Sas ◽  
Janja Vaupotic ◽  
Erika Kocsis ◽  
János Somlai ◽  
...  
Keyword(s):  
Health Risk ◽  
Gamma Spectrometry ◽  
Half Life ◽  
Activity Concentration ◽  
Soil Samples ◽  
Radon Emanation ◽  
Decay Products ◽  
Radon Monitor ◽  
Hpge Gamma Spectrometry ◽  
Chamber Technique

Abstract The health risk from thoron (Rn-220) is usually ignored owing to its short half-life (55.6 s), but the generated thoron decay products can cause a significant dose contribution. In this study, altogether 51 Slovenian soil samples were investigated using an accumulation chamber technique to obtain information about thoron exhalation features. The obtained (massic) thoron exhalation results varied between 6.9 and 149 mBq·kg−1·s−1 (average: 55.2 mBq·kg−1·s−1). The Th-232 content was determined using HPGe gamma spectrometry. The Th-232 activity concentration ranged between 9.3 and 161.7 Bq·kg−1 (average: 64.6 Bq·kg−1). The thoron emanation features were also calculated from the obtained results (2.9 to 21.2% with an average of 8.6%). The thoron exhalation and emanation properties were compared with the radon exhalation and emanation features determined in a previous study. It was found that there was no correlation between the radon and thoron emanation features, according to the obtained data. This can be explained by the different Ra-224 and Ra-226 distributions in the soil grains. As a result, the thoron emanation factor cannot be predicted from radon emanation and vice versa.

500 An in vitro steady flow model of mitral regurgitation by three-dimensional Doppler

1999 ◽  
Vol 1 ◽  
pp. S86-S86
Author(s):  
R DESIMONE ◽  
G GLOMBITZA ◽  
C VAHL ◽  
H MEINZER ◽  
S HAGL
Keyword(s):  
Mitral Regurgitation ◽  
Steady Flow ◽  
Flow Model ◽  
Three Dimensional

CFD Investigation of Steady Flow in Bi-Leaflet Heart Valve Hinge

2000 ◽  
Vol 28 (1-2) ◽  
pp. 61-67 ◽  
Author(s):  
JunHong Wang ◽  
Tony Joon Hock Yeo ◽  
Chu-Sing Lim
Keyword(s):  
Steady Flow ◽  
Heart Valve
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