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arXiv 1404.3603nucl-ex
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$^{12}$ C+ $^{12}$ C熔合-蒸发反应中的非统计衰变和$α$ -关联(95 MeV)

Non-statistical decay and $α$-correlations in the $^{12}$C+$^{12}$C fusion-evaporation reaction at 95 MeV

L. Morelli, G. Baiocco, M. D'Agostino, F. Gulminelli, M. Bruno, U. Abbondanno, S. Appannababu, S. Barlini, M. Bini, G. Casini, M. Cinausero, M. Degerlier, D. Fa… 展开作者

L. Morelli, G. Baiocco, M. D'Agostino, F. Gulminelli, M. Bruno, U. Abbondanno, S. Appannababu, S. Barlini, M. Bini, G. Casini, M. Cinausero, M. Degerlier, D. Fabris, N. Gelli, F. Gramegna, V. L. Kravchuk, T. Marchi, G. Pasquali, S. Piantelli, S. Valdré, Ad R. Raduta

摘要:

本文研究了在95 MeV的$^{12}$ C+ $^{12}$ C反应中完全能在电荷中探测到的熔合-蒸发事件的多重α符合和关联。两个特定的通道与碳和氧残留物符合$α$ -粒子的地址,这是与高分支比与豪泽-Feshbach计算的预测。三重α发射出现运动学兼容的顺序发射从一个高度兴奋的镁。$α$ - $α$符合的相空间分布表明来自Mg化合物的相关发射,留下在中子衰变阈值以上激发的氧残留物。这些观察结果表明,在远高于$6-α$衰变阈值的激发能下,$^{24}$ Mg的优先$α$发射。

英文摘要:

Multiple alpha coincidence and correlations are studied in the reaction $^{12}$C+$^{12}$C at 95 MeV for fusion-evaporation events completely detected in charge. Two specific channels with Carbon and Oxygen residues in coincidence with $α$-particles are addressed, which are associated with anomalously high branching ratios with respect the predictions by Hauser-Feshbach calculations. Triple alpha emission appears kinematically compatible with a sequential emission from a highly excited Mg. The phase space distribution of $α$-$α$ coincidences suggests a correlated emission from a Mg compound, leaving an Oxygen residue excited above the threshold for neutron decay. These observations indicate a preferential $α$ emission of $^{24}$Mg at excitation energies well above the threshold for $6-α$ decay.

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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