Physics Letters B (Sep 2021)
Structure of high-lying levels populated in the 96Y →96Zr β decay
- K.R. Mashtakov,
- V.Yu. Ponomarev,
- M. Scheck,
- S.W. Finch,
- J. Isaak,
- M. Zweidinger,
- O. Agar,
- C. Bathia,
- T. Beck,
- J. Beller,
- M. Bowry,
- R. Chapman,
- M.M.R. Chishti,
- U. Friman-Gayer,
- L.P. Gaffney,
- P.E. Garrett,
- E.T. Gregor,
- J.M. Keatings,
- U. Köster,
- B. Löher,
- A.D. MacLean,
- D. O'Donnell,
- H. Pai,
- N. Pietralla,
- G. Rainovski,
- M. Ramdhane,
- C. Romig,
- G. Rusev,
- D. Savran,
- G.S. Simpson,
- J. Sinclair,
- K. Sonnabend,
- P. Spagnoletti,
- A.P. Tonchev,
- W. Tornow
Affiliations
- K.R. Mashtakov
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK; Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada; Corresponding author at: Departments of Physics, University of Guelph, Guelph, Ontario, N1G 2W1, Canada.
- V.Yu. Ponomarev
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- M. Scheck
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- S.W. Finch
- Department of Physics, Duke University, Durham, NC 27708-0308, USA; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA
- J. Isaak
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- M. Zweidinger
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- O. Agar
- Department of Physics, Karamanoglu Mehmetbey University, 70100 Karaman, Turkey
- C. Bathia
- Department of Physics, Duke University, Durham, NC 27708-0308, USA; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA
- T. Beck
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- J. Beller
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- M. Bowry
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- R. Chapman
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- M.M.R. Chishti
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- U. Friman-Gayer
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA; Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chappel Hill, NC 27599, USA
- L.P. Gaffney
- Department of Physics, University of Liverpool, Liverpool L69 3BX, UK
- P.E. Garrett
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
- E.T. Gregor
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- J.M. Keatings
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- U. Köster
- ILL, Institut Laue-Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
- B. Löher
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64289 Darmstadt, Germany
- A.D. MacLean
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
- D. O'Donnell
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- H. Pai
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany; Nuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata, 700064, India
- N. Pietralla
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- G. Rainovski
- Faculty of Physics, University of Sofia St. Kliment Ohridski, 1164 Sofia, Bulgaria
- M. Ramdhane
- LPSC, UJF Grenoble I, 53 avenue des Martyrs, 38026 Grenoble Cedex, France
- C. Romig
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- G. Rusev
- Department of Physics, Duke University, Durham, NC 27708-0308, USA; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA
- D. Savran
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64289 Darmstadt, Germany
- G.S. Simpson
- LPSC, UJF Grenoble I, 53 avenue des Martyrs, 38026 Grenoble Cedex, France
- J. Sinclair
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- K. Sonnabend
- ILL, Institut Laue-Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
- P. Spagnoletti
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, UK; Scottish Universities Physics Alliance, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
- A.P. Tonchev
- Department of Physics, Duke University, Durham, NC 27708-0308, USA; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA
- W. Tornow
- Department of Physics, Duke University, Durham, NC 27708-0308, USA; TUNL, Triangle Universities Nuclear Laboratory, Durham, NC 27708-0308, USA
- Journal volume & issue
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Vol. 820
p. 136569
Abstract
The nature of the high-lying final levels of the 96Ygs β decay, one of the three most important contributors to the high-energy reactor antineutrino spectrum, has been investigated in high-resolution γ-ray spectroscopy following the β decay as well as in a campaign of inelastic photon scattering experiments. The comprehensive approach establishes 1− levels associated with the Pygmy Dipole Resonance as high-lying final levels in the β decay. Branching ratios extracted from β decay complement photon scattering and allow the absolute E1 excitation strength to be determined for levels populated in both reactions. The combined data represents a comprehensive approach to the wavefunction of the 1− levels below the Qβ value, which are investigated in the Quasiparticle Phonon Model. The calculations reveal that the components populated in β decay contribute only with small amplitudes to the complex wavefunction of these 1− levels. A comparison of the β decay results to data from total absorption γ-ray spectroscopy demonstrates a good agreement between both measurements.
