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Low-lying levels of96Tc excited in the93Nb(α, n)96Tc reaction

Ниэколежашие уровни96Tc, воэбуждаемые в реакции93Nb)(α, п)96Tc

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Il Nuovo Cimento A (1965-1970)

Summary

The level structure of96Tc has been investigated by means of the93Nb(α, n)96Tc reaction. Excitation functions have been measured for some γ-transitions in the energy intervalE α=(11÷14) MeV. Gammagamma coincidence measurements have been made with two germanium detectors atE α=10.8 and 14.0 MeV. A new low-lying level at 49.1 keV withJ=6 and a mean life <3 ns has been identified. Eighteen new levels at 482.3, 506.6, 529.7, 541.2, 550.9, 575.0, 580.8, 618.8, 646.1, 731.8, 752.4, 787.9, 815.0, 866.2, 886.1, 947.1, 977.7 and 1062.6 keV have been also observed. Moreover, with the reaction96Mo(p, nγ)96Tc and a pulsed beam, the mean life of the 120.2 keV level has been determined asτ m =(36.4±0.6) ns.

Riassunto

Lo schema di livelli del96Tc è stato studiato tramite la reazione93Nb(α, n)96Tc. Sono state misurate le funzioni d’eccitazione per diverse transizioni nell’intervallo di energiaE α=(11 ÷ 14) MeV. Sono state fatte, inoltre, misure di coincidenza γ-γ con due rivelatori a germanio aE α=10.8 MeV e 14.0 MeV. In questo modo è stato possibile identificare un nuovo livello a 49.1 keV (J=6,τ m <3 ns) e altri diciotto livelli a 482.3, 506.6, 529.7, 541.2, 550.9, 575.0, 580.8, 618.8, 646.1, 731.8, 752.4, 787.9, 815.0, 866.2, 886.1, 947.1, 977.7 e 1062.6 keV. Infine con la reazione96Mo(p, nγ)96Tc e fascio pulsato è stata misurata la vita media del livello a 120.2 keV. Il valore ottenuto èτ m =(36.4±0.6) ns.

Реэюме

Исследуется структура уровней96Tc с помошью реакции93Nb(α, n)96Tc. Иэмеряются функции воэбуждения для некоторых гамма-переходов в знергетическом интервалеE α=(11÷14) MзB. Были проведены иэмерения гамма-гамма совпадений с помошью двух германиевых детекторов приE α=10.8 и 14.0 MзB. Идентифицируется новый ниэколежаший уровень при 49.1 KзB cJ=6 и средним временемτ m <3 нсек. Также были обнаружены восемнадцать новых уровней при знергиях 482.3, 506.6, 529.7, 541.2, 550.9, 575.0, 580.8, 618.8, 646.1, 731.8, 752.4, 787.9, 815.0, 866.2,886.1,947.1,977.7 и 1062.6 КзB. Кроме того, с помошью реакции96Mo(p, nγ)96Tc и импульсного пучка, было определено среднее время жиэни уровня 120.2 КзB, которое составляетτ m =(36.4±0.6) нсек.

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Authors and Affiliations

  1. Istituto di Fisica dell’Università, Firenze

    M. Bini, A. M. Bizzeti Sona, P. G. Bizzeti, P. Blasi, A. Olmi & N. Taccetti

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italy

    M. Bini, A. M. Bizzeti Sona, P. G. Bizzeti, P. Blasi, A. Olmi & N. Taccetti

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  1. M. Bini
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  2. A. M. Bizzeti Sona
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  3. P. G. Bizzeti
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  4. P. Blasi
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  5. A. Olmi
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  6. N. Taccetti
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Bini, M., Bizzeti Sona, A.M., Bizzeti, P.G. et al. Low-lying levels of96Tc excited in the93Nb(α, n)96Tc reaction. Nuov Cim A 35, 69–83 (1976). https://doi.org/10.1007/BF02730061

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  • DOI: https://doi.org/10.1007/BF02730061

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