%A"Kul'chitskii, L A"
%A"Latyshev, G D"
%A"Bulyginskii, D G"
%D1949
%I;
%JDokl. Akad. Nauk SSSR; (USSR)
%K73 NUCLEAR PHYSICS AND RADIATION PHYSICS, BISMUTH 212, ALPHA DECAY, THORIUM 228, ALPHA PARTICLES, ANGULAR CORRELATION, GAMMA RADIATION, NUCLEAR POTENTIAL, ACTINIDE ISOTOPES, ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BISMUTH ISOTOPES, CHARGED PARTICLES, CORRELATIONS, DECAY, ELECTROMAGNETIC RADIATION, EVEN-EVEN NUCLEI, HEAVY NUCLEI, HOURS LIVING RADIOISOTOPES, IONIZING RADIATIONS, ISOTOPES, NUCLEI, ODD-ODD NUCLEI, POTENTIALS, RADIATIONS, RADIOISOTOPES, THORIUM ISOTOPES, YEARS LIVING RADIOISOTOPES, 652022* - Nuclear Properties & Reactions, A=220 & above, Experimental- Radioactive Decay- (-1987), 651922 - Nuclear Properties & Reactions, A=190-219, Experimental- Radioactive Decay- (-1987)
%PMedium: X; Size: Pages: 57-60
%TAngular correlation between short-range. cap alpha. particles and. gamma. quanta
%XChang (Phys. Rev. 69, 60(1946); 70, 632(1946)) has found that the intensities of short-range ..cap alpha.. rays of Po and Ra are considerably higher than the values given by the Geiger-Nuttall law. This can be explained by assuming surface vibrations of ..cap alpha..-radioactive nuclei, which produce deformations and corresponding lowerings of the potential barrier in certain directions. In this case an angular correlation should exist between the short-range ..cap alpha.. ray and the accompanying ..gamma.. quantum. The authors checked this conclusion by applying the coincidence method to the ..cap alpha.. and ..gamma.. radiations of a mixture of RdTh (/sup 228/Th) and ThC (/sup 212/Bi). Maxima of coincidence numbers occur at angles 45 and 135 deg., with lesser maxima at 0 and 180 deg. Theoretical considerations show that in cases (like the one investigated) where the nuclear spin before and after the ..cap alpha.. and ..gamma.. emissions is zero, the angular correlations are uniquely determined whatever the deformation caused by the vibration; in other cases, the correlation depends on the kind of deformation. Therefore, it would be interesting to investigate the case of Pa, whose nuclear spin is not zero and the decay exhibits intensive groups of short-range ..cap alpha.. particles.
%0Journal Article
USSR https://doi.org/ Journal ID: CODEN: DANKA TIC Russian