beta decay as new probe for the low-energy E1 strength

Marcus Scheck, S. Mishev, V. Yu. Ponomarev, O. Agar, T. Beck, A. Blanc, R. Chapman, U. Gayer, L. P. Gaffney, E. T. Gregor, J. Keatings, P. Koseoglu, U. Koester, K.R. Mashtakov, David O'Donnell, H. Pai, N. Pietralla, D. Savran, J. F. Smith, Pietro SpagnolettiG. S. Simpson, M. Thuerauf, V. Werner

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Abstract

In this contribution, it is evaluated whether high Q-value β decays from mothers with low ground-state spin are suitable to probe the structure of 1− levels associated with the pygmy dipole response. A comparison of data from the exemplary 136I →136Xe β decay and the 136Xe(γ,γ′) reaction reveals that some 1− levels are populated in both reactions but with a different pattern. An investigation within the microscopic quasiparticle phonon model shows that the pattern is related to the population of different parts of the wave functions of these 1− levels establishing β decay as a novel probe.
Original languageEnglish
Pages (from-to)547-552
JournalActa Physica Polonica B
Volume48
Issue number3
DOIs
Publication statusPublished - 22 Jan 2017

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Scheck, M., Mishev, S., Ponomarev, V. Y., Agar, O., Beck, T., Blanc, A., ... Werner, V. (2017). beta decay as new probe for the low-energy E1 strength. Acta Physica Polonica B, 48(3), 547-552. https://doi.org/10.5506/APhysPolB.48.547