β Scribed by Hiroshi Miyahara; Nobuyuki Iida; Tamaki Watanabe
No coin nor oath required. For personal study only.
The coincidence methods which are currently used for the accurate activity standardisation of radionuclides, require dead time and resolving time corrections which tend to become increasingly uncertain as countrates exceed about 10 k. To reduce the dependence on such corrections, Miiller, in 1981, proposed the selective sampling method using a fast multichannel analyser (50 ns ch-') for measuring the countrates. It is, in many ways, more convenient and possibly potentially more reliable to replace the MCA with scalers and a circuit is described employing five scalers; two of them serving to measure the background correction. Results of comparisons using our new method and the coincidence method for measuring the activity of "Co sources yielded agreement within statistical uncertainties.
π SIMILAR VOLUMES
A method for ENDOR study of powdered samples is described, giving the polar angle between g,, and A,, and the true values of the hyperfine splittings. Using this method Cu(I1) complexes of dimethyldithiocarbamate and methyldithiocarbonate magnetically diluted in the corresponding Ni(I1) host lattice
## Abstract Choosing data points is a common problem for researchers who employ various meshless methods for solving partial differential equations. On the one hand, high accuracy is always desired; on the other, illβconditioning problems of the resultant matrices, which may lead to unstable algori
## Abstract A Reineck Box core sampler has been modified for quantitative use in the marine benthos. The modifications are inexpensive and easily accomplished in any machine shop. Samples have been successfully taken in medium coarse to fine sands for layer by layer analysis. The apparatus has a hi