Physics Letters B (Mar 2025)
Signature of 0+ excited state and shape coexistence in 94Kr through 93Kr(d,p)94Kr reaction
- D. Walter,
- R. Kanungo,
- M. Holl,
- S. Roy-Garand,
- B.S. Hu,
- J.D. Holt,
- M. Alcorta,
- C. Andreoiu,
- S. Bhattacharjee,
- A.A. Chen,
- A. Chester,
- D. Connolly,
- B. Davids,
- N. Esker,
- F. Garcia,
- S. Gillespie,
- G. Hackman,
- S. Ishimoto,
- R. Krücken,
- P. Jassal,
- J. Laroche,
- J. Liang,
- B. Olaizola,
- A. Psaltis,
- J. Smallcombe,
- I.J. Thompson,
- C. Waterfield
Affiliations
- D. Walter
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada; TRIUMF, Vancouver, BC, V6T 2A3, Canada
- R. Kanungo
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada; TRIUMF, Vancouver, BC, V6T 2A3, Canada; Corresponding author.
- M. Holl
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada; TRIUMF, Vancouver, BC, V6T 2A3, Canada
- S. Roy-Garand
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
- B.S. Hu
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- J.D. Holt
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- M. Alcorta
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- C. Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
- S. Bhattacharjee
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- A.A. Chen
- Department of Physics and Astronomy, McMaster University, Hamilton, ON, L8S 481, Canada
- A. Chester
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- D. Connolly
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- B. Davids
- TRIUMF, Vancouver, BC, V6T 2A3, Canada; Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
- N. Esker
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- F. Garcia
- Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
- S. Gillespie
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- G. Hackman
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- S. Ishimoto
- High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan
- R. Krücken
- TRIUMF, Vancouver, BC, V6T 2A3, Canada; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- P. Jassal
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
- J. Laroche
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
- J. Liang
- Department of Physics and Astronomy, McMaster University, Hamilton, ON, L8S 481, Canada
- B. Olaizola
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- A. Psaltis
- Department of Physics and Astronomy, McMaster University, Hamilton, ON, L8S 481, Canada
- J. Smallcombe
- TRIUMF, Vancouver, BC, V6T 2A3, Canada
- I.J. Thompson
- Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, CA 94551, USA
- C. Waterfield
- Astronomy and Physics Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
- Journal volume & issue
-
Vol. 862
p. 139352
Abstract
A measurement of the excitation spectrum of 94Kr via one-neutron transfer to the ground state of 93Kr using the 93Kr(d,p)94Kr reaction at 8A MeV, observing the outgoing protons, performed with the IRIS facility at TRIUMF is reported. Two states in 94Kr, at 1.50±0.14 MeV and 2.20±0.14 MeV, were observed. An adiabatic-wave approximation analysis of the differential cross sections leads us to identify the lower energy state as being populated with neutron transfer to the 3s1/2 orbital. This leads to the first observation of the lowest 0+ excited state in 94Kr, hence signaling shape co-existence. Theoretical calculations performed within the in-medium similarity renormalization group framework are presented that also show the existence of a low-energy 0+ state, aligning qualitatively with the observation.
