Isospin Symmetry in the sd Shell: Transition Strengths in the Neutron-deficient sd Shell Nucleus 33Ar

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Reduced transition strengths of the deexciting transitions from the first two excited states in 33Ar were measured in a relativistic Coulomb excitation experiment at the GSI Helmholtz center. The radioactive ion beam was produced by fragmentation of a primary 36Ar beam on a 9Be target followed by the selection of the reaction product of interest via the GSI Fragment Separator. The 33Ar beam hit a secondary 197Au target with an energy of approximately 145 MeV/nucleon. An array of high-purity germanium cluster detectors
and large-volume BaF2 scintillator detectors were employed for γ -ray spectroscopy at the secondary target position. The Lund-York-Cologne Calorimeter was used to track the outgoing ions and to identify the nuclear reaction channels. For the two lowest energy excited states of 33Ar the reduced transition strengths have been
determined. With these first results the Tz = −3/2 nucleus 33Ar is now, together with 21Na (Tz = −1/2), the only neutron-deficient odd-A sd shell nucleus in which experimental transition strengths are available. The experimental values are compared to results of shell-model calculations which describe simultaneously mirror-energy differences and transition-strength values of mirror pairs in the sd shell in a consistent way.

Detaljer

Författare
  • A. Wendt
  • J. Taprogge
  • P. Reiter
  • H. Grawe
  • S. Pietri
  • P. Boutachkov
  • A. Algora
  • F. Ameil
  • M. A. Bentley
  • A. Blazhev
  • D. Bloor
  • N. S. Bondili
  • M. Bowry
  • A. Bracco
  • N. Braun
  • F. Camera
  • F. Crespi
  • A. de la Salle
  • Douglas DiJulio
  • P. Doornenbal
  • K. Geibel
  • Jnaneswari Gellanki
  • J. Gerl
  • J. Grȩbosz
  • G. Guastalla
  • T. Habermann
  • M. Hackstein
  • R. Hoischen
  • A. Jungclaus
  • E. Merchán
  • B. Million
  • A. Morales
  • K. Moschner
  • Zs. Podolyák
  • N. Pietralla
  • D. Ralet
  • M. Reese
  • L. Scruton
  • B. Siebeck
  • N. Warr
  • O. Wieland
  • H. J. Wollersheim
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik

Nyckelord

Originalspråkengelska
Artikelnummer054301
Antal sidor7
TidskriftPhysical Review C (Nuclear Physics)
Volym90
Utgivningsnummer5
StatusPublished - 2014
PublikationskategoriForskning
Peer review utfördJa

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Relaterad forskningsoutput

Golubev, P., Wendt, A., Scruton, L., Taprogge, J., Rudolph, D., Reiter, P., Bentley, M. A., Avdeichikov, V., Boutachkov, P., Fox, S. P., Gerl, J., Goergen, C., Hoischen, R., Kurz, N., Singh, B. S. N., Pascovici, G., Pietri, S., Schaffner, H., Taylor, M. J., Thiel, S. & 1 andraWollersheim, H. J., 2013, I : Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 723, s. 55-66

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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Dirk Rudolph, Claes Fahlander, Pavel Golubev, Luis Sarmiento Pico, Anton Såmark-Roth, Daniel Cox, Ulrika Forsberg, Christian Lorenz, Natasa Lalovic, Natasa Lalovic, Ulrika Forsberg, Jnaneswari Gellanki, Robert Hoischen, Emma Johansson, Lise-Lotte Andersson, Rickard du Rietz, Jörgen Ekman & Corina Andreoiu

Kungliga Fysiografiska Sällskapet i Lund, Swedish Research Council

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