Angular correlations in ternary fission induced by polarized neutrons

Fundamental Neutron Physics

“…In the second case, however, the mechanism for the emission of the ternary particle does not possess the same intermediate states that are known to exist in binary fission, and upon averaging over the large number of fragment states one would expect the parity-odd correlations that involve the ternary particle to be much smaller. This is what is observed experimentally in 233 U [317][318][319][320][321]. Furthermore, the parity-odd asymmetries of the two large fragments were seen to be independent of the energy of the ternary particle.…”

Fission via compound states andJπKA. Bohr's channels: what we can learn from recent studies with slow neutrons

“…However, this hypothesis was met with a scepticism based on naive semiclassical interpretation of spin-orbit interaction. It was noted in [17] [18]. However, another semiclassical model for the source of this asymmetry was proposed based on the rotation of the fissioning nucleus.…”

“…In the experiments [16,17] with target nuclei 233 U it was found that D 13 D 24 D. Formally, it corresponds to 3-fold correlation (p α [s × p LF ]), which is T-odd. Thus the asymmetry was named the T effect.…”

“…During the last decade new angular correlations, known as T (formal, not real, violation of Time reversal invariance) and R (Rotation) effects [16][17][18][19][20], have been found in fission of nuclei 233 U and 235 U by slow polarized neutrons. Formally both angular correlations are odd with respect to time reverse (T-odd), but they have nothing to do with violation of fundamental time reversal invariance.…”

A method to measure neutron polarization using P-even asymmetry of γ-quantum emission in the neutron-nuclear interaction

“…Potential applications include measurement/monitoring of the neutron beam polarization in experiments with frequently varying configuration, which are typical, for instance, for neutron instruments devoted to fundamental particle physics [10]: to give examples: * The text was submitted by the authors in English. 1 [ [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]; applicability of this method to experiments demanding the highest precision in the neutron polarization analysis, like to precision studies of the neutron β decay [27] has to be studied.…”