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arXiv 1306.3697nucl-ex
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从蒸发碎片谱和观测到的异常获得的核温度

Nuclear temperatures from the evaporation fragment spectra and observed anomalies

A. Ray, A. De, A. Chatterjee, S. Kailas, S. R. Banerjee, K. Banerjee, S. Saha

摘要:

本文将不同复合核在A=100附近(EX=76-210 MeV)的α、锂、铍、硼和碳的极端背角蒸发谱与标准统计模型程序CASCADE和GEMINI的预测作了比较。结果发现,α谱的形状与统计模型的预测吻合得很好。然而,锂、铍、硼和碳的光谱显示出明显更平缓的斜率,这意味着残余核的温度更高,即使光谱满足统计排放的所有其他经验标准。观察到的斜率异常被认为是最大的锂和降低在较高的激发能。这些结果不能通过调整统计模型的参数或从反应动力学来理解,可能需要从量子力学的角度来检查统计模型。

英文摘要:

The extreme back-angle evaporation spectra of alpha, lithium, beryllium, boron and carbon from different compound nuclei near A=100 (EX=76-210 MeV) have been compared with the predictions of standard statistical model codes such as 'CASCADE' and 'GEMINI'. It was found that the shapes of the alpha spectra agree well with the predictions of the statistical models. However the spectra of lithium, beryllium, boron and carbon show significantly gentler slopes implying higher temperature of the residual nuclei, even though the spectra satisfy all other empirical criteria of statistical emissions. The observed slope anomaly was found to be largest for lithium and decreases at higher excitation energy. These results could not be understood by adjusting the parameters of the statistical models or from reaction dynamics and might require examining the statistical model from a quantum mechanical perspective.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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