Core breaking at low spin in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Zn</mi><mprescripts></mprescripts><none></none><mn>68</mn></mmultiscripts></math> from nuclear resonance fluorescence

S. R. Johnson; R. V. F. Janssens; B. A. Brown; A. D. Ayangeakaa; S. S. Bhattacharjee; E. Churchman; S. W. Finch; U. Friman-Gayer; S. Frye; M. Fulghieri; D. Gribble; X. H.-K. James; R. Longland; C. Wegner

doi:10.1103/hfk6-hmvf

Core breaking at low spin in ${}^{68}{Zn}$ from nuclear resonance fluorescence

S. R. Johnson ^1,2,*, R. V. F. Janssens ^1,2, B. A. Brown ^3,4, A. D. Ayangeakaa ^1,2, S. S. Bhattacharjee⁵, E. Churchman ^1,2, S. W. Finch ^2,6, U. Friman-Gayer ^2,6, S. Frye ^1,2 et al.

M. Fulghieri ^1,2,†, D. Gribble ^1,2, X. H.-K. James ^1,2, R. Longland ^2,7, and C. Wegner ^1,2

¹Department of Physics & Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
²Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
³Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
⁴Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
⁵TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
⁶Department of Physics, Duke University, Durham, North Carolina 27708, USA
⁷Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA

^*Present address: Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA and Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA.
^†Present address: Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

PDF

Phys. Rev. C 114, 034318 – Published 15 September, 2026

DOI: https://doi.org/10.1103/hfk6-hmvf

Abstract

Low-spin excited states in ${}^{68}{Zn}$ have been studied at the High Intensity Gamma-Ray Source ( $HI γ S$ ) from the ground state up to the particle emission threshold using the nuclear resonance fluorescence technique and the newly developed clover array. Low-spin levels were excited by linearly polarized, 2.90–9.79 MeV photon beams. Spin-parity quantum numbers as well as associated $M 1$ and $E 1$ decay strengths were determined for a large fraction of the 158 states observed. In addition, long-duration coincidence measurements at 9.46 and 9.79 MeV enabled the investigation of the level scheme near the ground state. The results have been interpreted with shell-model calculations using two different model spaces and several effective interactions often used to describe nuclei in this mass region. While the structure near the ground state can be understood in terms of excitations involving solely valence nucleons, core breaking is required to account for the evolution of the total $M 1$ strength at excitation energies above approximately 5 MeV.

Physical Review C

Export citation

Export citation

Core breaking at low spin in ${}^{68}{Zn}$ from nuclear resonance fluorescence

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Other Options

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Core breaking at low spin in Zn68 from nuclear resonance fluorescence

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

References (Subscription Required)

Core breaking at low spin in ${}^{68}{Zn}$ from nuclear resonance fluorescence