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arXiv 1302.0664nucl-exnucl-th
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~(16)O +~(12)C反应产生的~(28)Si ~* 中的形变

Deformation in 28Si* produced via 16O + 12C reaction

S. Kundu, C. Bhattacharya, S. Bhattacharya, T. K. Rana, K. Banerjee, S. Muhkopadhayay, D. Gupta, A. Dey, R. Saha

摘要:

在25 $^\circ$ $\lesssim θ_{c.m.} \lesssim$ 70 $^\circ$的质心角范围内,测量了反应$^{16}$ O(7-10 MeV/核子)+ $^{12}$ C发射的$α$粒子的能谱.将实验能谱与用旋转液滴模型(RLDM)预测的“变形性”参数进行统计模型计算得到的能谱进行了比较,并与优化的“变形性”参数进行了拟合,但两者相差很大。数据也被发现可以很好地解释使用“冻结”变形近似,其中的“变形性”参数已被保持固定在RLDM值的母核在整个衰变过程中。后一种情况下的有效半径小于使用优化参数获得的有效半径;然而,在这两种情况下,变形(有效半径)大于相应的RLDM值。因此,考虑到实际复合核变形估计的不确定性,只能定性地说,平衡轨道,这是类似于粒子蒸发的时间尺度,也可能是观测到的变形的贡献因素之一。

英文摘要:

The energy spectra of the $α$ particles emitted in the reactions $^{16}$O (7-10 MeV/nucleon) + $^{12}$C have been measured in the center of mass angular range of 25$^\circ$ $\lesssim θ_{c.m.} \lesssim$ 70$^\circ$. The experimental energy spectra have been compared with those obtained from the statistical model calculation with "deformability" parameters predicted by rotating liquid drop model (RLDM) and also fitted the same with optimized "deformability" parameters, which are quite different from the respective RLDM values. The data have also been found to be explained quite well using "frozen" deformation approximation, where the "deformability" parameters have been kept fixed at RLDM values of the parent nucleus throughout the decay process. The effective radius in the latter case is smaller compared to that obtained using the optimized parameters; however, in both cases, the deformations (effective radii) are larger than the corresponding RLDM values. So, considering the uncertainties in the estimation of actual compound nucleus deformations, it can, only qualitatively, be said that equilibrium orbiting, which is similar to particle evaporation in time scale, could also be one of the contributing factors for the observed deformation.

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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