UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-22 1:56
 HOME     CONFERENCES     SEARCH            LOGIN     NEW USER     IMAGES   


Conference: Bucharest University Faculty of Physics 2021 Meeting


Section: Nuclear and Elementary Particles Physics


Title:
SPATIAL SYMMETRY BREAKING EFFECTS IN SLOW NEUTRONS INTERACTIONS WITH LEAD NUCLEUS


Authors:
Alexaxndru Ioan Oprea, Cristiana Oprea


Affiliation:
Joint Institute for Nuclear Research (JINR), Frank Laboratory for Neutron Physics (FLNP)

141980 Dubna, Russian Federation


E-mail
ionica@nf.jinr.ru


Keywords:
slow neutrons, spatial parity breaking, non-leptonic weak matrix element


Abstract:
Spatial parity breaking effects in the interaction of slow and resonant neutrons with Lead nucleus will be investigated. For scattering and capture processes spin rotation, asymmetry of emitted neutrons and asymmetry of emitted gamma quanta were evaluated and compared with existing experimental data. Spatial parity violation effects were evaluated in the frame of the formalism of the mixing states of compound nucleus with the same spin and opposite parities [1]. Applying the approach described in [2], from theoretical evaluations related to scattering and capture experimental data, weak matrix element was extracted. Matrix element of weak non leptonic weak interaction is of order of meV and in the range of slow neutrons, parity violation effects are of order of 10-6-10-4 and lower. Similar values were obtained in the analysis symmetry breaking effects on other processes and nuclei [2]. From obtained results the existence of a new negative resonance near the neutron threshold it is confirmed [3]. Symmetry breaking effects in the scattering and capture process on Lead nucleus are planned to be measured at basic facilities from FLNP JINR Dubna and from other neutrons research centers from Russia and abroad.


References:

1. V. V. Flambaum, G. F. Gribakin, Prog. Part. Nucl. Phys. 1995 V. 35, P. 423

2. A.I. Oprea, C. Oprea, Yu.M. Gledenov, P.V. Sedyshev, C. Pirvutoiu, D. Vladoiu, Romanian Reports in Physics, ISSN 1221-1451, 2011, V. 63, № 2, P. 357-375

3. G. A. Lobov, Yadernaya Fizika, 2000, V. 63, № 8, P. 1465 (in Russian)