Mixed-symmetry octupole and hexadecapole excitations in the N=52 isotones
Artikel i vetenskaplig tidskrift, 2014

Background: Excitations with mixed proton-neutron symmetry have been previously observed in the N=52 isotones. Besides the well-established quadrupole mixed-symmetry states (MSS), octupole and hexadecapole MSS have been recently proposed for the nuclei Zr92 and Mo94. Purpose: The heaviest stable N=52 isotone Ru96 was investigated to study the evolution of octupole and hexadecapole MSS with increasing proton number. Methods: Two inelastic proton-scattering experiments on Ru96 were performed to extract branching ratios, multipole mixing ratios, and level lifetimes. From the combined data, absolute transition strengths were calculated. Results: Strong M1 transitions between the lowest-lying 3- and 4+ states were observed, providing evidence for a one-phonon mixed-symmetry character of the 32(-) and 42+ states. Conclusions: sdg-IBM-2 calculations were performed for Ru96. The results are in excellent agreement with the experimental data, pointing out a one-phonon hexadecapole mixed-symmetry character of the 42+ state. The 31-||M1||32(-) matrix element is found to scale with the 2s+||M1||2ms+ matrix element.

Författare

A. Hennig

Universität zu Köln

M. Spieker

Universität zu Köln

V. Werner

Technische Universität Darmstadt

Yale University

T. Ahn

University of Notre Dame

Yale University

V. Anagnostatou

University of Surrey

Yale University

N.P. Cooper

Yale University

V. Derya

Universität zu Köln

M. Elvers

Universität zu Köln

Yale University

J. Endres

Universität zu Köln

P. Goddard

University of Surrey

Yale University

Andreas Martin Heinz

Chalmers, Fundamental fysik

R.O. Hughes

Yale University

University of Richmond

G. Ilie

Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering

Yale University

M.N. Mineva

Bulgarian Academy of Sciences

P. Petkov

Bulgarian Academy of Sciences

Universität zu Köln

S.G. Pickstone

Universität zu Köln

N. Pietralla

Technische Universität Darmstadt

D. Radeck

Yale University

Universität zu Köln

T.J. Ross

University of Richmond

University of Surrey

D. Savran

Frankfurt Institute for Advanced Studies

Helmholtz

A. Zilges

Universität zu Köln

Physical Review C - Nuclear Physics

24699985 (ISSN) 24699993 (eISSN)

Vol. 90 5 Art. no. 051302- 051302

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevC.90.051302

Mer information

Senast uppdaterat

2020-09-15