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Title: Application of T-Invariance Conditions in Selecting Mechanisms of Nuclear Reactions, Decays, and Fission

Abstract

T-invariance conditions for the differential cross sections of multiparticle multistep nuclear reactions are found with allowance for spin orientations of particles in the initial channels of such reactions. It is shown that the asymmetry coefficients for different T-parities in the differential cross sections for original and time-reversed reactions are expressed in terms of unified scalar (pseudoscalar) functions that depend of the 3-momenta and spins of particles involved in the initial and final channels of the reactions under analysis. It is also shown that knowledge of the aforementioned functions for the asymmetries under analysis in the original reaction makes it possible to reconstruct the respective functions for the analogous asymmetries in the time-reversed reaction without studying it experimentally. By considering the example of T-even and T-odd asymmetries in reactions where oriented nuclei undergo binary and ternary fission induced by cold polarized neutrons, it is demonstrated that the T-invariance conditions in question can be used to select mechanisms behind the appearance of the above asymmetries—in particular, mechanisms associated with the presence of T-noninvariant interactions.

Authors:
;  [1]
  1. Voronezh State University (Russian Federation)
Publication Date:
OSTI Identifier:
22761713
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 81; Journal Issue: 4; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY COEFFICIENTS; DECAY; DIFFERENTIAL CROSS SECTIONS; NEUTRONS; ORIENTED NUCLEI; PARITY; PSEUDOSCALARS; SCALARS; SPIN; SPIN ORIENTATION; T INVARIANCE; TERNARY FISSION

Citation Formats

Kadmensky, S. G., E-mail: kadmensky@phys.vsu.ru, and Kostrukov, P. V. Application of T-Invariance Conditions in Selecting Mechanisms of Nuclear Reactions, Decays, and Fission. United States: N. p., 2018. Web. doi:10.1134/S1063778818040087.
Kadmensky, S. G., E-mail: kadmensky@phys.vsu.ru, & Kostrukov, P. V. Application of T-Invariance Conditions in Selecting Mechanisms of Nuclear Reactions, Decays, and Fission. United States. doi:10.1134/S1063778818040087.
Kadmensky, S. G., E-mail: kadmensky@phys.vsu.ru, and Kostrukov, P. V. Sun . "Application of T-Invariance Conditions in Selecting Mechanisms of Nuclear Reactions, Decays, and Fission". United States. doi:10.1134/S1063778818040087.
@article{osti_22761713,
title = {Application of T-Invariance Conditions in Selecting Mechanisms of Nuclear Reactions, Decays, and Fission},
author = {Kadmensky, S. G., E-mail: kadmensky@phys.vsu.ru and Kostrukov, P. V.},
abstractNote = {T-invariance conditions for the differential cross sections of multiparticle multistep nuclear reactions are found with allowance for spin orientations of particles in the initial channels of such reactions. It is shown that the asymmetry coefficients for different T-parities in the differential cross sections for original and time-reversed reactions are expressed in terms of unified scalar (pseudoscalar) functions that depend of the 3-momenta and spins of particles involved in the initial and final channels of the reactions under analysis. It is also shown that knowledge of the aforementioned functions for the asymmetries under analysis in the original reaction makes it possible to reconstruct the respective functions for the analogous asymmetries in the time-reversed reaction without studying it experimentally. By considering the example of T-even and T-odd asymmetries in reactions where oriented nuclei undergo binary and ternary fission induced by cold polarized neutrons, it is demonstrated that the T-invariance conditions in question can be used to select mechanisms behind the appearance of the above asymmetries—in particular, mechanisms associated with the presence of T-noninvariant interactions.},
doi = {10.1134/S1063778818040087},
journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 4,
volume = 81,
place = {United States},
year = {2018},
month = {7}
}