Polarization mechanism for nonconservation of parity and the effect of a weak neutral interaction in heavy. mu. -mesic atoms

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:6949664

Grechukhin, D P; Soldatov, A A

An estimate is made of the effect of nonconservation of parity of the 3d-orbit meson states for mesic atoms with odd nuclei in the Z=56--60 and Zapprox.83 ranges in which the hyperfine structure terms of the 3p/sup 3///sub 2/--3d/sup 5///sub 2/ and 3p/sup 1///sub 2/--3d/sup 5///sub 2/ orbits respectively intersect. The angular distribution coefficient ..cap alpha.. in W (theta) =1+..cap alpha..costheta for quanta emitted by polarized mesic atoms in the 3d..-->..1s transition is determined. The effect of a weak neutral interaction between a muon and a nucleus and the Coulomb polarization mechanism for transferring the nonconservation of parity of nuclear states to mesic atom states in the chain of nonradiative transitions of a meson are considered. In the nuclear ranges indicated above the effect of the weak interaction for 3d- and 3p-orbits is smaller by two--three orders of magnitude than the effect of the polarization mechanism. Under optimal conditions for the intersection of 3d/sup 5///sub 2/ and 3p/sup 3///sub 2/ terms of a mesic atom which, as is shown, can be realized in the range Z=56--60 this mechanism leads to a value of the coefficient ..cap alpha.. which is approximately equal to the amplitude for the nonconservation of parity for nuclear states ..beta.. (I/sub ..nu../E/sub ..nu../) lying at E/sub ..nu../approx. =h..omega.. (3d..-->..1s) and E/sub ..nu../approx. =h..omega.. (3d..-->..2p). If dynamic amplification of the nonconservation of parity of nuclear states occurs at E/sub ..nu../approx. =5--6 MeV, i.e., ..beta.. (I/sub ..nu../E/sub ..nu../) approx.10/sup -5/, then for the quanta arising from a 3d..-->..1s transition of a meson under real conditions for the transfer of polarization of the meson spin in the cascade of transitions populating the 3d/sup 5///sub 2/-orbit the anisotropy coefficient ..cap alpha.. can attain a value of approx.10/sup -5/.

• Research Organization: I. V. Kurchatov Atomic Energy Institute
• OSTI ID: 6949664
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 46:1; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

640303* -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOMS
BASIC INTERACTIONS
DISTRIBUTION
ENERGY-LEVEL TRANSITIONS
HYPERFINE STRUCTURE
INTERACTIONS
INVARIANCE PRINCIPLES
MUONIC ATOMS
P INVARIANCE
WEAK INTERACTIONS