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Search: (WFRF:(Heinz Andreas Martin 1967)) srt2:(2011-2014) > (2012)

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1.
  • Alikhani, B., et al. (author)
  • Compton polarimetry with a 36-fold segmented HPGe-detector of the AGATA-type
  • 2012
  • In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. - : Elsevier BV. - 0168-9002. ; 675, s. 144-154
  • Journal article (peer-reviewed)abstract
    • The calibration of a highly-segmented AGATA-type HPGe-detector as a gamma-ray Compton polarimeter and a method for (quasi-)continuous angle Compton polarimetry are presented. The high granularity, combined with the large detection efficiency of the AGATA-type HPGe-crystals, offers a significant advantage for polarization measurements of gamma-radiation. A polarization-directional correlation experiment with gamma-rays from a Co-60 source with an activity of about 680 kBq was used to determine the polarization sensitivity of a single AGATA-type HPGe-crystal at 1173 and 1332 key and to demonstrate the method. The polarization measurement was based on segment information. In our set-up a polarization sensitivity of 19% at 1332 keV has been achieved.
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2.
  • McCutchan, E.A., et al. (author)
  • Precise γ-ray intensity measurements in 10B
  • 2012
  • In: Physical Review C - Nuclear Physics. - 2469-9985 .- 2469-9993. ; 86:5
  • Journal article (peer-reviewed)abstract
    • Precise electromagnetic transition matrix elements in 10Be and 10C have provided surprisingly stringent tests of modern ab initio calculations using realistic nuclear forces. The analog transition in 10B can further constrain these new calculations and probe the symmetry of the wave functions across the A=10 multiplet. We report on a careful measurement of the γ-ray intensities from states populated in the 10B(p,p) reaction at 10 MeV, including a determination of the key E2 branch from the J=2 T=1 state at 5164keV to the J=0 T=1 state at 1740keV of 0.16(4)%. © 2012 American Physical Society.
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3.
  • Werner, V., et al. (author)
  • Lifetime and magnetic moment measurements
  • 2012
  • In: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 366:1, s. Art. no. 012048-
  • Conference paper (peer-reviewed)abstract
    • The g-Plunger technique has been introduced, which allows for the simultaneous measurement of lifetimes and absolute values of g-factors using a plunger device in inverse kinematics. Experiments on the 104,106,108Pd isotopes using Coulomb excitation resulted in g-factors in agreement with literature data. Lifetimes of 2 1 + states have in part significantly changed in this work.
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