6533b85dfe1ef96bd12be3fa

RESEARCH PRODUCT

Evidence for octupole collectivity in 172Pt

A. ErtoprakB. CederwallC. QiÖ. AktasM. DoncelB. HadiniaR. LiottaM. SandzeliusC. ScholeyK. AndgrenT. BäckH. BadranT. BraunrothT. CalverleyD. M. CoxD. M. CullenY. D. FangE. GanioğluM. GilesM. B. Gomez HornillosT. GrahnP. T. GreenleesJ. HiltonD. HodgeE. IdeguchiU. JakobssonA. JohnsonP. M. JonesR. JulinS. JuutinenS. KetelhutA. KhaplanovM. Kumar RajuM. LeinoH. LiH. LiuS. MattaV. ModamioB. S. Nara SinghM. NiikuraM. NymanI. ÖZgürR. D. PageJ. PakarinenP. PapadakisJ. PartanenE. S. PaulC. M. PetracheP. PeuraP. RahkilaP. RuotsalainenJ. SarénJ. SorriS. StolzeP. SubramaniamM. J. TaylorJ. UusitaloJ. J. Valiente-dobónR. Wyss

subject

Subatomär fysikSubatomic Physicsydinfysiikka

description

Excited states in the extremely neutron-deficient nucleus 172Pt were populated via 96Ru(78Kr,2p) and 92Mo(83Kr,3n) reactions. The level scheme has been extended up to an excitation energy of  ~ 5 MeV and tentative spin-parity assignments up to Iπ = 18+. Linear polarization and angular distribution measurements were used to determine the electromagnetic E1 character of the dipole transitions connecting the positive-parity ground-state band with an excited side-band, firmly establishing it as a negative-parity band. The lowest member of this negative-parity structure was firmly assigned spin-parity 3-. In addition, we observed an E3 transition from this 3- state to the ground state, providing direct evidence for octupole collectivity in 172Pt. Large-scale shell model (LSSM) and total Routhian surface (TRS) calculations have been performed, supporting the interpretation of the 3- state as a collective octupole-vibrational state. QC 20200427

yearjournalcountryeditionlanguage
2020-01-01
10.1140/epja/s10050-020-00071-6http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-271657