Isoscalar Breathing-Mode State in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Sm</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>144</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Pb</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>208</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

D. H. Youngblood; C. M. Rozsa; J. M. Moss; D. R. Brown; J. D. Bronson

doi:10.1103/PhysRevLett.39.1188

Isoscalar Breathing-Mode State in ${}^{144}{Sm}$ and ${}^{208}{Pb}$

D. H. Youngblood, C. M. Rozsa, J. M. Moss, D. R. Brown, and J. D. Bronson

Phys. Rev. Lett. 39, 1188 – Published 7 November 1977

Abstract

Inelastic $α$ -scattering experiments have been performed on ${}^{144}{Sm}$ and ${}^{208}{Pb}$ at $E_{α} = 96$ MeV over the angular range $3 ° <~ θ_{L} <~ 8 °$ . It is apparent that the isoscalar giant resonance in these nuclei consists of at least two broad components. The angular distribution for one component ( ${}^{144}{Sm}$ $E_{x} \sim 12.4$ MeV, ${}^{208}{Pb}$ $E_{x} \sim 11.0$ MeV) is well described as $E 2$ , while that for other component ( ${}^{144}{Sm}$ $E_{x} \sim 15.1$ MeV, ${}^{208}{Pb}$ $E_{x} \sim 13.7$ MeV) is well described by an $E 0$ excitation exhausting approximately 100% of the $E 0$ energy-weighted sum rule.