原子核の186Pbbにある異なる形状のスピンゼロ状態のトリプレート

Andreyev¹, Huyse, Van Duppen P

¹Instituut voor Kern- en Stralingsfysica, University of Leuven, Belgium.

Nature

|June 6, 2000

まとめ

研究者らは,核186Pbに独特の形状のトリプレットを発見し,球形,形,形の状態を明らかにした. この発見は,伝統的な核刺激モデルに異議を唱え,新しい核構造現象を強調しています.

科学分野:

核物理学核物理学とは
原子核は原子核を構成する.

背景:

偶数原子核の低レベルの興奮は,通常,核対の破裂,振動,または回転を含む.
形状の共存のような現象で見られるように,フェルミ表面での微妙な核の再配置のために,マクロの形状の変化が起こる可能性があります.

研究の目的:

中性子欠乏核186Pb.b.の興奮スペクトルを実験的に調査する.
186Pb.における最も低いエネルギー状態の形状を特定し,特徴づけること.

主な方法:

親核からのアルファ崩壊を活用して186Pbで集団状態を構成した.
高効率の速度フィルターを使用し,バックグラウンドを減少させました.
識別のための選択的リコイル-アルファ-電子の偶然タグ付け技術を適用した.

主要な成果:

実験的に,186Pbの最も低いエネルギー状態の3つの異なる形状の存在が確認されました:球形,円形,および円形.
186Pbのエネルギースペクトルでユニークな"形状のトリプル"を特定しました.

結論:

186Pbで観察された形状のトリプレットは,新しい核刺激モードを表しています.
186Pbの周辺の特殊な核条件は,核の形状のこのユニークな表現を可能にします.
この発見は,核構造と興奮機構の理解を広げています.

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