The structure of the Pygmy Dipole Resonance
The structure of the Pygmy Dipole Resonance
The structure of the Pygmy Dipole Resonance
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α particles vs. photons (macroscopic)<br />
Multipolarity<br />
Isospin<br />
“Location”<br />
Energy resolution<br />
(@ E X = 8 MeV)<br />
(γ,γ’)<br />
(EM interaction)<br />
E1,M1,(E2)<br />
(ground state decay<br />
width Γ 0<br />
)<br />
isovector<br />
whole nucleus<br />
(kR « 1)<br />
7-10 keV<br />
(α,α’)*<br />
(strong interaction)<br />
E0,E1,E2,E3<br />
(angular distribution)<br />
isoscalar<br />
surface peaked<br />
(strong absorption)<br />
30-100 keV<br />
(straggling)<br />
* 130 MeV und forward angle<br />
⇒ New <strong>structure</strong> information<br />
⇒ Important for spectroscopy <strong>of</strong> PDR
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