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A revised B(E2; 2₁⁺ → 0₁⁺) value in the semi-magic nucleus ²¹⁰Po

: Kocheva, Diana; Rainovski, Georgi; Jolie, Jan; Pietralla, Norbert; Blazhev, Andrey; Astier, Alain; Altenkirch, Richard; Ansari, Saba; Braunroth, Thomas; Cortés, Martha Liliana; Dewald, Alfred; Diel, Felix; Djongolov, Martin; Fransen, Christoph; Gladnishki, Kalin; Hennig, Andreas; Karayonchev, Vasil; Keatings, James Michael; Kluge, Eschly; Litzinger, Julia; Müller-Gatermann, Claus; Petkov, Pavel; Rudigier, Matthias; Scheck, Marcus; Scholz, Philipp; Spagnoletti, Pietro; Spieker, Mark; Stahl, Christian; Stegmann, Robert; Stoyanova, Milena; Thöle, Pierre; Warr, Nigel; Werner, Volker; Witt, Waldemar; Wölk, Dorothea; Zell, Karl Oskar; Isacker, Piet van; Ponomarev, Vladimir Y.


The European physical journal. A, Hadrons and nuclei 53 (2017), Nr.9, Art. 175, 7 S.
ISSN: 1434-6001
ISSN: 1434-601X
ISSN: 1431-5831
Fraunhofer INT ()

The lifetimes of the 2₁⁺ , the 2₂⁺ and the 3₁⁻ states of ²¹⁰Po have been measured in the ²⁰⁸Pb(¹²C,¹⁰Be)²¹⁰Po transfer reaction by the Doppler-shift attenuation method. The result for the lifetime of the 2₁⁺ state is about three times shorter than the adopted value. However, the new value still does not allow for a consistent description of the properties of the yrast 2₁⁺ , 4₁⁺ , 6₁⁺ , and 8₁⁺ states of ²¹⁰Po in the framework of nuclear shell models. Quasi-particle Phonon Model (QPM) calculations also cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.