軽い断片でシェル効果によって駆動される非対称な分裂島
P Morfouace1,2, J Taieb3,4, A Chatillon3,4
1CEA, DAM, DIF, Arpajon, France. pierre.morfouace@cea.fr.
Nature
|April 30, 2025
まとめ
研究者は100の奇妙なシステムで 核分裂断片の電荷分布を研究し 核分裂メカニズムに関する新しい洞察を明らかにしました これらの発見は,中性子欠乏核をアクティニドと結びつけ,非対称的な分裂における陽子殻の役割を強調しています.
科学分野:
- 核物理学
- 核化学
- 天体物理学
背景:
- 原子核の分裂は 元素の起源とエネルギー生産を理解するために 極めて重要です
- 断片質量と電荷分布は,核分裂機構と理論モデルを理解するための鍵です.
- アクチニドは外殻効果により非対称な分裂を示しますが,より軽い元素は典型的には対称な分裂を経験しますが,異質な核は例外です.
研究 の 目的:
- 100の異星系における 原子核分裂の粒子積みの 積みの分布を測定する
- ニュートロン不足の亜鉛核とよく理解されているアクティニド領域の間のリンクを確立する.
- 非対称な核分裂島をマッピングし,核分裂における特定の陽子殻の役割を特定する.
主な方法:
- 分裂断片の電荷分布を実験的に測定する.
- 100の異様な核分裂システムの分析
- 既存の理論モデルとアクティニド分裂特性の比較
主要な成果:
- アシンメトリック・フィッシング・アイランドの 詳細な地図です
- 亜鉛核における光の断片分裂に対する変形したZ=36陽子殻の影響の明確な証拠です.
- 亜鉛核とアクティニドの分裂特性を結びつける新しいデータ
結論:
- この研究は核分裂モデルを改良するための重要なデータを提供します.
- 発見は,r-プロセス核合成と元素の起源の理解を進める.
- 亜鉛とアクティニドの分裂特性との確立されたリンクは,核図の異なる領域における核分裂のより完全なイメージを提供します.
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