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Extra Yield in Hot Ni Isotopes below the Giant Dipole Resonance

O. Wieland,A. BraccoV. Vasilca, Y. Xu

Nuovo Cimento della Societa Italiana di Fisica C(2024)

Ist Nazl Fis Nucl | Horia Hulubei Natl Inst Phys & Nucl Engn | Appl Nucl Phys Dept | Henryk Niewodniczanski Inst Nucl Phys

Cited 0|Views34
Abstract
. - The high-energy gamma-rays from the GDR decay of 56,60,62Ni* nuclei at finite temperature, produced in the reactions 32,34,36S + 24,26Mg at bombarding energies between 78 , 90 MeV, were measured and analyzed with statistical model using a Monte Carlo approach. It is found that the present analysis gives some evidence on the presence of an extra yield on the tail of the Giant Dipole Resonance which may be attributed to a Pygmy Dipole Resonance in an excited nucleus.
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要点】:本文通过统计模型和蒙特卡洛方法分析了高温下镍同位素在巨偶极共振以下区域的高能伽马射线,发现了可能属于激发核的矮偶极共振的证据。

方法】:使用统计模型结合蒙特卡洛方法对产生的伽马射线进行分析。

实验】:在78至90 MeV的轰击能量下,通过32S、34S、36S与24Mg、26Mg的反应产生了56Ni、60Ni、62Ni*核,测量并分析了其巨偶极共振衰减产生的高能伽马射线,实验使用的数据集为这些核反应产生的伽马射线谱,结果显示了巨偶极共振尾部存在额外产额的证据。