TY - JOUR
AU - Trifonova, E.
AB - DETERMINATION OF ULTRAMICROQUANTITIES OF Ra 226 IN VARIOUS SUBSTANCES A. A. Pomanskii, S. A. Severnyi, UDC 543.52:546.296 and E. P. Trifonova The task of recording solar neutrinos imposes rigid limitation on the maximum permissible amounts of U 2~8, Th 2~2, and their decay products in the detector and materials surrounding it [I, 2]. A method of de- termining radioactive contamination of materials based on a measurement of their surface a-activity, devel- oped earlier [3], is unsuitable for the liquids used in most detectors to record neutrinos [4]. On the basis of an apparatus designed earlier [5], we have developed a method of extracting radon Rn 222 from various sub- stances, recording its activity in a proportional counter, and calculating the activity of radium Ra 226 present in the product being analyzed. It is considered in this case that the disintegration of one radon atom in the counter leads to the appearance of an average of two counts in atime of little more than 1 h: one formed as a result of disintegration of the Rn 222 itself, and the other as a result of disintegration of i~o 218 or Po 214, pre- sent in equilibrium with Rn 222. The 
TI - Determination of ultramicroquantities of Ra226 in various substances
JF - Atomic Energy
DO - 10.1007/BF01816910
DA - 2005-05-18
UR - https://www.deepdyve.com/lp/springer-journals/determination-of-ultramicroquantities-of-ra226-in-various-substances-d8lm0Ffhg0
SP - 718
EP - 720
VL - 27
IS - 1
DP - DeepDyve
ER -