Isospin Mixing of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mn>4</mn></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> Particle-Hole States in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">O</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>16</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

D. B. Holtkamp; W. J. Braithwaite; W. Cottingame; S. J. Greene; R. J. Joseph; C. Fred Moore; C. L. Morris; J. Piffaretti; E. R. Siciliano; H. A. Thiessen; D. Dehnhard

doi:10.1103/PhysRevLett.45.420

Isospin Mixing of $4^{-}$ Particle-Hole States in ${}^{16}O$

D. B. Holtkamp, W. J. Braithwaite, W. Cottingame, S. J. Greene, R. J. Joseph, C. Fred Moore, C. L. Morris, J. Piffaretti, E. R. Siciliano, H. A. Thiessen, and D. Dehnhard

Phys. Rev. Lett. 45, 420 – Published 11 August 1980

Abstract

Transitions to ( $4^{-}$ , $T = 0$ ) states in ${}^{16}O$ at 17.79 and 19.80 MeV are found to be strongly asymmetric in $π^{+}$ vs $π^{-}$ inelastic scattering; in contrast, the $π^{+}$ and $π^{-}$ cross sections for the ( $4^{-}$ , $T = 1$ ) state at 18.99 MeV are equal. Three-state isospin mixing is proposed as an explanation. Off-diagonal charge-dependent mixing matrix elements of - 147±25 and - 99±17 keV are obtained.