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Spontaneous fission of neutron-deficient fermium isotopes and the new nucleus $$^{241}$$Fm

中性子欠損したフェルミウム元素の自発核分裂と新同位体$$^{241}$$Fm

Khuyagbaatar, J.*; Hofmann, S.*; He${ss}$berger, F. P.*; Ackermann, D.*; Burkhard, H. G.*; Heinz, S.*; Kindler, B.*; Kojouharov, I.*; Lommel, B.*; Mann, R.*; Maurer, J.*; 西尾 勝久   ; Novikov, Y.*

Khuyagbaatar, J.*; Hofmann, S.*; He${ss}$berger, F. P.*; Ackermann, D.*; Burkhard, H. G.*; Heinz, S.*; Kindler, B.*; Kojouharov, I.*; Lommel, B.*; Mann, R.*; Maurer, J.*; Nishio, Katsuhisa; Novikov, Y.*

Spontaneous fission of neutron-deficient fermium isotopes with neutron number N$$<$$144 was investigated. The nuclei were produced in fusion-evaporation reactions of $$^{40}$$Ar beams with $$^{204,206-208}$$Pb targets. The new isotope $$^{241}$$Fm was identified, and the half-life 0.73 ms was determined. The half-life was significantly longer than the neighboring even-even isotopes $$^{242,244}$$Fm, and the hindrance factor were calculated by the to be 1.1$$times$$10$$^{4}$$ for $$^{241}$$Fm and 5.2$$times$$10$$^{4}$$ for $$^{243}$$Fm, being associated with the lower tunneing probability for nuclei having nuclear spins. The result suggests also the possible production and detection of $$^{239,237}$$Fm becalsue of the stabilization against spontaneous fission.

使用言語

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English

掲載資料名

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European Physical Journal A

巻

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37

号

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2

ページ数

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p.177 - 183

発行年月

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2008/08

発表会議名

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開催年月

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開催都市

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開催国

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キーワード

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no keyword

特許データ

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PDF

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論文URL

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https://doi.org/10.1140/epja/i2008-10608-4

研究データの公開先DOI

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使用施設

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広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Gesellschaft f$"u$r Schwerionenforschung

Access

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- Accesses

InCites™

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パーセンタイル：81.98

分野：Physics, Nuclear

Altmetrics

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