Literature cited
I. M. Bekkerman, B. A. Gumenyuk and I. S. Dneprovskii, The BPP Type Beta Spectrometer (VINITI, Moscow, 1959).
I. S. Dneprovskii and G. M. Kolesov, Izv. Akad. Nauk SSSR, Ser. Fiz.22, 935 (1958).
B. S. Dzhelepov and L. K. Peker, Deformed Nuclei in the Nd-Os Region [in Russian] (Dubna, 1958).
Additional information
I should like to avail myself of this opportunity to express my warm gratitude to B. 5. Dzhelepov and K. Ya. Gromov for their kind counsel and discussion of the experimental results, and to I. A. Yutlandov and Yu. V. Narseev for performing the experiments on the chemical isolation of the specimens.