在Hg和Au的衰变中的精细结构
概括
这项研究使用先进的衰变光谱学研究了水星-186和黄金-187中的α-衰变细结构. 确定了新的α衰变和过渡,为核结构和衰变特性提供了洞察力.
科学领域:
- 核物理 核物理 核物理
- 核光谱学 核光谱学
- 放射性衰变是一种放射性衰变.
背景情况:
- 了解放射性衰变的细结构对于核结构模型至关重要.
- 之前对 (Hg) 和黄金 (Au) 同位素的研究提供了关于它们的衰变特性的有限信息.
研究的目的:
- 为了研究-186 (Hg) 和金-187 (Au) 原子核的α-衰变细结构.
- 在这些同位素中识别新的衰变路径和过渡.
- 测量核特性,如激发能,过渡能和内部转换系数.
主要方法:
- 实验是在芬兰Jyväskylä大学 (JYFL) 的加速器实验室进行的.
- 重离子聚变蒸发反应 (Kr + Ru和Kr + Mo) 用于产生Hg和Au核.
- 使用反弹分离器RITU和数字数据采集系统进行衰变光谱,包括蒸发残留 (ER) -α相关性和α-α巧合.
主要成果:
- 从Hg观察到一个新的alpha衰变,E_alpha = 6156(10) keV,在Platinum-182 (Pt) 中以131.3(5) keV填充了一个 (9/2) 兴奋状态.
- 第一次测量了Pt中的131.3(5) keV过渡的内部转换系数.
- 对Au观察到一个新的α衰变,E_alpha = 5998(9) keV,在Iridium-183 (Ir) 中填充了156.1(6) keV的兴奋状态. 从这种状态确定了两个脱刺激路径.
- 观察到一个新的215.7(13) keV过渡,在Ir.中排斥了424.4(13) keV兴奋状态.
- 使用缩小宽度和阻碍因子分析了Hg和Auα衰变的特性.
结论:
- 该研究成功地确定了Hg和Au同位素中的新的α衰变和转变,大大提高了对它们的衰变特性的理解.
- 这些测量为完善核结构模型和了解核图中这个区域放射性衰变的机制提供了宝贵的数据.
- 新确定的核特性,包括激发能和内部转换系数,为理论计算提供了关键的基准.
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