Physics Letters B (Dec 2018)
Lifetime measurement of the 21+ state in 74Rb and isospin properties of quadrupole transition strengths at N = Z
- C. Morse,
- H. Iwasaki,
- A. Lemasson,
- A. Dewald,
- T. Braunroth,
- V.M. Bader,
- T. Baugher,
- D. Bazin,
- J.S. Berryman,
- C.M. Campbell,
- A. Gade,
- C. Langer,
- I.Y. Lee,
- C. Loelius,
- E. Lunderberg,
- F. Recchia,
- D. Smalley,
- S.R. Stroberg,
- R. Wadsworth,
- C. Walz,
- D. Weisshaar,
- A. Westerberg,
- K. Whitmore,
- K. Wimmer
Affiliations
- C. Morse
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Corresponding author at: Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
- H. Iwasaki
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- A. Lemasson
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- A. Dewald
- Institut für Kernphysik der Universität zu Köln, D-50937 Köln, Germany
- T. Braunroth
- Institut für Kernphysik der Universität zu Köln, D-50937 Köln, Germany
- V.M. Bader
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- T. Baugher
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- D. Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- J.S. Berryman
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- C.M. Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- A. Gade
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- C. Langer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA
- I.Y. Lee
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- C. Loelius
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- E. Lunderberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- F. Recchia
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D. Smalley
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- S.R. Stroberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- R. Wadsworth
- Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
- C. Walz
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- D. Weisshaar
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- A. Westerberg
- Department of Physics, Central Michigan University, Mount Pleasant, MI 48859, USA
- K. Whitmore
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- K. Wimmer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics, Central Michigan University, Mount Pleasant, MI 48859, USA
- Journal volume & issue
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Vol. 787
pp. 198 – 203
Abstract
Self-conjugate nuclei in the A≈70–80 region have attracted a great deal of attention due to phenomena such as shape coexistence and increasing collectivity along the N=Z line. We investigate the structure of nuclei in this region through lifetime measurements using the GRETINA array. The first implementation of the Differential Recoil Distance Doppler Shift technique with fast radioactive beams is demonstrated and verified through a measurement of the well-known B(E2;21+→01+) transition strength in 74Kr. The method is then applied to determine the B(E2;21+→01+) transition strength in 74Rb, the heaviest odd–odd N=Z nucleus for which this quantity has been determined. This result and extended systematics along N=Z suggest the dominance of the isoscalar part of the quadrupole transition strengths in self-conjugate nuclei, as well as the possible presence of shape coexistence in 74Rb. Keywords: Lifetimes, Nuclear transition probabilities, Isospin
