Electric Monopole Transitions from Excited 0^+ States in ^<156>Gd

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概要

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• Internal conversion electron spectra from the decay of ^<156>Eu wee measured at high resolution with an air-core, β-ray spectrometer. The source of ^<156>Eu was made through the double neutron capture process by irradiating separated ^<154>Sm with thermal neutrons and was chemically separated. Our data were combined with recent gamma-ray data to deduce conversion coefficients for 47 transitions. The 0^+ states at 1049.4, 1168.1 and 1715.2 keV were confirmed. Spins and parities of other states were also assigned or confirmed. A method of analysis for β-band de-excitations is developed with ratios of E2/E0 matrix elements. The β-fround mixing parameter of ^<156>Gd is obtained to be 0.014, while the β-y mixing parameter 0.029 for the 2^+_β state and 0.005 for the 4^+_β state. RADIOACTIVITY ^<156>Eu [from ^<154>Sm(n, y) ^<155>Eu⟶^^β^<155>Eu(n, y) reactions], measured T_<1/2>, E_e, I_e, ce, α_K, ^<156>Gd deduced levels and J^π. Enriched target.

• 社団法人日本物理学会の論文
• 1976-12-15

著者

• KATOH Toshio

  Department of Nuclear Engineering, Nagoya University

• Katoh Toshio

  Department Of Nuclear Engineering Faculty Of Engineering Nagoya University

• Pinajian J.

  Oak Ridge National Laboratory

• Hamilton J.

  Department Of Physics Vanderbilt University

• Fujioka Manabu

  Department Of Applied Physics Tokyo Institute Of Technology:(present Address) Department Of Physics

• Fujioka Manabu

  Department Of Applied Physics Tokyo Institute Of Technology

• YAMADA Hironari

  Department of Nuclear Engineering, Nagoya University

• Yamada Hironari

  Department Of Nuclear Engineering Nagoya University

• SEKIKAWA Mitsuhiro

  Department of Applied Physics, Tokyo Institute of Technology

• AHN S.

  Yonsei University

• JOHNSON N.

  Oak Ridge National Laboratory

• Sekikawa Mitsuhiro

  Department Of Applied Physics Tokyo Institute Of Technology

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