Search for mixed-symmetry states of nuclei in the vicinity of the double-magic nucleus 208Pb
oleh: Kocheva D., Stegmann R., Rainovski G., Jolie J., Pietralla N., Stahl C., Petkov P., Blazhev A., Hennig A., Bauer C., Braunroth Th., Carpenter M.P., Cortes L., Dewald A., Djongolov M., Fransen C., Gladnishki K., Janssens R.V.F., Karayonchev V., Lettmann M., Lister C.J., Litzinger J., Möller Th., Möller-Gatermann C., Scheck M., Scholz Ph., Schramm C., Thöle P., Werner V., Wölk D., Zhu S., Van Isacker P.
| Format: | Article |
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| Diterbitkan: | EDP Sciences 2016-01-01 |
Deskripsi
In this work we present the results from two experiments dedicated to search for quadrupolecollective isovector valence-shell excitation, the states with so-called mixed proton-neutron symmetry (MSS), in nuclei around the doubly magic nucleus 208Pb. 212Po was studied in an α-transfer reaction. 204Hg was studied in an inverse kinematics Coulomb excitation reaction on a carbon target. Both experiments provide indications for existence of one-phonon MSSs. Those are the first experimentally identified MSSs in the mass A ≈ 208 region.