Isospin-Forbidden Decay of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>T</mi><mo>=</mo><mn>2</mn><mn></mn></math> State at 15.43 MeV in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Mg</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>24</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>

Robert L. McGrath; S. W. Cosper; Joseph Cerny

doi:10.1103/PhysRevLett.18.243

Isospin-Forbidden Decay of the $O^{+}$ , $T = 2$ State at 15.43 MeV in ${}^{24}{Mg}$

Robert L. McGrath, S. W. Cosper, and Joseph Cerny

Phys. Rev. Lett. 18, 243 – Published 13 February 1967

Abstract

The sought, but previously unobserved, isospin-forbidden particle-decay modes of a $T = 2$ state in a $T_{z} = 0$ nucleus have been determined by particle-particle coincidence techniques. Proton decays ( $Δ T = 1 or 2$ ) and strong evidence for $α$ -particle decays ( $Δ T = 2$ ) from the $T = 2$ state of ${}^{24}{Mg}$ were observed and show $Σ Γ_{particle} ≫ Γ_{γ}$ .