Accurate determination of the pKωK value and the fluorescence yield ωK of Sr after electron capture decay of88Y

1973 ◽  
Vol 264 (3) ◽  
pp. 253-258 ◽  
Author(s):  
W. Bambynek ◽  
D. Reher
Keyword(s):  
Electron Capture ◽  
Accurate Determination ◽  
Fluorescence Yield ◽  
Electron Capture Decay

scholarly journals On the energy deposition by electrons in air and the accurate determination of the air-fluorescence yield

2013 ◽  
Vol 53 ◽  
pp. 10001 ◽  
Author(s):  
J. Rosado ◽  
P. Gallego ◽  
D. García-Pinto ◽  
F. Blanco ◽  
F. Arqueros
Keyword(s):  
Energy Deposition ◽  
Accurate Determination ◽  
Fluorescence Yield ◽  
Air Fluorescence

Half-Life Determination of 41Ca and Some Other Radioisotopes

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 436-446 ◽  
Author(s):  
Walter Kutschera ◽  
Irshad Ahmad ◽  
Michael Paul
Keyword(s):  
Mass Spectrometry ◽  
Electron Capture ◽  
Half Life ◽  
Specific Activity ◽  
Low Energy ◽  
X Rays ◽  
Weighted Mean ◽  
Electron Capture Decay

We have performed a new determination of the half-life of 41Ca by measuring the specific activity of an enriched Ca material with known 41Ca abundance. We measured the activity via the 3.3-keV X-rays emitted in the electron capture decay of 41Ca, and the 41Ca abundance was measured by low-energy mass spectrometry. The result, t1/2 = (1.01 ± 0.10) × 105 yr, agrees with the recent ‘geological’ half-life of Klein et al., (1991), t1/2 = (1.03 ± 0.07) × 105 yr, and with the corrected value of Mabuchi et al. (1974), t1/2 = (1.13 ± 0.12) × 105 yr. We recommend the weighted mean of these three measurements, t1/2 = (1.04 ± 0.05) × 105 yr, as the most probable half-life of 41Ca. We also discuss the situation of the radioisotopes, 32Si, 44Ti, 79Se and 126Sn, whose half-lives, though still uncertain, are potentially interesting for future AMS studies and other applications.

An accurate determination of the K-shell X-ray fluorescence yield of silicon

2012 ◽  
Vol 41 (3) ◽  
pp. 164-171 ◽  
Author(s):  
T. L. Hopman ◽  
C. M. Heirwegh ◽  
J. L. Campbell ◽  
M. Krumrey ◽  
F. Scholze
Keyword(s):  
Accurate Determination ◽  
Fluorescence Yield ◽  
X Ray

Precise measurement of theX K emission rate following the electron capture-decay of54Mn-fluorescence yield ? K of Cr

1978 ◽  
Vol 284 (4) ◽  
pp. 389-397 ◽  
Author(s):  
P. Magnier ◽  
J. Bouchard ◽  
M. Blondel ◽  
J. Legrand ◽  
J. P. Perolat ◽  
...  
Keyword(s):  
Electron Capture ◽  
Precise Measurement ◽  
Emission Rate ◽  
Fluorescence Yield ◽  
Electron Capture Decay

scholarly journals Ultramicro determination of plasma testosterone by electron-capture detection of testosterone diheptafluorobutyrate

1968 ◽  
Vol 107 (2) ◽  
pp. 285-292 ◽  
Author(s):  
D. Exley
Keyword(s):  
Electron Capture ◽  
Accurate Determination ◽  
Internal Standard ◽  
High Sensitivity ◽  
Electron Capture Detection ◽  
Plasma Testosterone ◽  
Gas Liquid Chromatography ◽  
Radioactive Label ◽  
Peripheral Plasma

1. A new highly sensitive and accurate ultramicro method for the estimation of testosterone in human peripheral plasma is described. The method uses paper-and thin-layer-chromatographic separation of plasma testosterone, which is determined as testosterone diheptafluorobutyrate by electron-capture detection after gas–liquid chromatography. 2. The average difference between duplicates is ±2% (range 1–5%) with as little as 2·5ml. of human male peripheral plasma. With 10ml. of plasma the method is sensitive enough for the accurate determination of testosterone in human female plasma. The high order of accuracy is achieved by the use of a radioactive label and an internal standard for gas chromatography, and by obtaining several gas chromatograms from the same plasma sample. 3. As little as 40μμg. of peripheral plasma testosterone can be detected. The method is 20 times as sensitive as electron-capture techniques with the monochloroacetate derivative. 4. The method is simpler and quicker than double-isotope-derivative methods, and slightly more sensitive. The advantages of the method, which is specific for testosterone, are its high sensitivity and accuracy, which are achieved with relative convenience.

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