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Qβ measurements of 158, 159Pm , 159, 161Sm , 160-165Eu , 163Gd and 166Tb using a total absorption BGO detector

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Abstract.

Q β values of the neutron-rich isotopes of 160-165Eu and 163Gd were measured for the first time using a total absorption bismuth germanate (BGO) detector, and previously obtained data on 158, 159Pm , 159, 161Sm and 166Tb were re-analyzed. These radioactive sources were prepared by an on-line mass separator (Tokai-ISOL) following the 238U (p,f reaction. The deduced Q β values are the following: 6085(80)keV for 158Pm , 3805(65)keV for 159Sm , 5460(140)keV for 159Pm , 4705(60)keV for 160Eu , 5065(130)keV for 161Sm , 3705(60)keV for 161Eu , 5575(60)keV for 162Eu , 4690(70)keV for 163Eu , 3170(70)keV for 163Gd , 6430(70)keV for 164Eu , 5800(120)keV for 165Eu , and 4695(70)keV for 166Tb . Moreover, the deduced mass excesses and two-neutron separation energies ( S 2n values) were compared with those of the atomic mass evaluations and theoretical predictions.

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Authors and Affiliations

  1. Graduate School of Engineering, Nagoya University, 464-8603, Nagoya, Japan

    H. Hayashi, Y. Akita & O. Suematsu

  2. Radioisotope Research Center, Nagoya University, 464-8602, Nagoya, Japan

    M. Shibata

  3. Japan Atomic Energy Agency, 319-1195, Tokai-mura, Naka-gun, Ibaraki, Japan

    M. Asai, T. K. Sato, S. Ichikawa, I. Nishinaka, Y. Nagame, A. Osa, K. Tsukada & T. Ishii

  4. Graduate School of Engineering, Hiroshima University, 739-8527, Higashi-Hiroshima, Japan

    Y. Kojima

  5. Research Reactor Institute, Kyoto University, 590-0494, Sennan-gun, Osaka, Japan

    A. Taniguchi

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  1. H. Hayashi
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  2. Y. Akita
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  3. O. Suematsu
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  4. M. Shibata
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Correspondence to H. Hayashi.

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J. Äystö

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Hayashi, H., Akita, Y., Suematsu, O. et al. Qβ measurements of 158, 159Pm , 159, 161Sm , 160-165Eu , 163Gd and 166Tb using a total absorption BGO detector. Eur. Phys. J. A 34, 363–370 (2007). https://doi.org/10.1140/epja/i2006-10522-9

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  • DOI: https://doi.org/10.1140/epja/i2006-10522-9

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