Experimental evidence for low-lying quadrupole isovector excitation of 208Po.

Authors :: Yaneva, A.
Kocheva, D.
Rainovski, G.
Jolie, J.
Pietralla, N.
Blazhev, A.
Dewald, A.
Djongolov, M.
Fransen, C.
Gladnishki, K. A.
Henrich, C.
Homm, I.
Ide, K. E.
John, P. R.
Kalaydjieva, D.
Karayonchev, V.
Kern, R.
Kleemann, J.
Kröll, Th.
Müller-Gatermann, C.
Source :: European Physical Journal A -- Hadrons & Nuclei. Oct2020, Vol. 56 Issue 10, p1-10. 10p.
Publication Year :: 2020
Abstract: We present the results from an experiment dedicated to measure the lifetime of the 2 2 + state, candidate for the one-phonon mixed-symmetry state, of 208 Po. This nucleus was studied in the α -transfer reaction 204 Pb( 12 C, 8 Be) 208 Po and the lifetime of the 2 2 + state was determined by utilizing the Doppler-shift attenuation method. The experimental data show that the 2 2 + state decays with a sizable M1 transition to the 2 1 + state revealing its isovector nature. [ABSTRACT FROM AUTHOR]