Decay properties of the 3-1 level in 96Mo

E.T. Gregor, N. Arsenyev, M. Scheck, T.M. Shneidman, M. Thuerauf, C. Bernards, A. Blanc, R. Chapman, F. Drouet, A.A. Dzhioev, G. de France, M. Jentschel, J. Jolie, J.M. Keatings, Th. Kroell, U. Koester, R. Leguillon, K.R. Mashtakov, P. Mutti, D. O'DonnellC.M. Petrache, G.S. Simpson, J. Sinclair, J.F. Smith, T. Soldner, P. Spagnoletti, A.V. Sushkov, W. Urban, A. Vancraeyenest, J.R. Vanhoy, V. Werner, K.O. Zell, M. Zielińska

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The first excited 3−1 level of 96Mo was investigated in a high-statistics experiment using the 95Mo(n, γγ) cold neutron capture reaction. The measurements used the high cold neutron flux from the research reactor at Institut Laue-Langevin and employed the highly-efficient EXILL array to detect γ-ray coincidences. The recorded statistics allow identification of decay branches with only a small relative intensity including the 3−1 → 0+gs E3 decay. With the knowledge of the newly measured branching ratio and the known B(E3, 3−1 → 0+gs) transition probability, the lifetime of the 3−1 level was determined and, subsequently, the B(E1) strength of the other decay branches of the 3− 1 octupole phonon were calculated. The extracted electromagnetic decay strengths are compared to the systematics of the stable even-even molybdenum isotopes and values calculated in a Skyrme-force based quasiparticle random phase approximation and in a cluster approach. Additionally, the 3− 1 → 2 + iv decay branch to the low-lying 2+ iv quadrupole isovector level was observed.
Original languageEnglish
Article number075101
Number of pages18
JournalJournal of Physics G: Nuclear and Particle Physics
Publication statusPublished - 15 May 2019


  • QRPA calculations
  • cluster model calculations
  • cold neutron capture reaction
  • octupole phonon
  • weak E3 branch


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