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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >THE NUCLEAR DEORIENTATION EFFECT IN XE-122 AND BA-128
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THE NUCLEAR DEORIENTATION EFFECT IN XE-122 AND BA-128

机译：XE-122和BA-128中的核脱位效应

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Time-differential measurements of the deorientation effect are performed with a plunger technique in Ba-128 and Xe-122 nuclei produced in heavy-ion induced reactions and recoiling into vacuum with velocities of about 1.2%c. The effect was found to modify the angular distributions of the transitions depopulating the 2(1)(+) and 4(1)(+) levels in both nuclei. To facilitate the analysis of the experimental attenuation factors G(k)(exp)(t), a new approach for the treatment of the loss of alignment at higher-lying feeding levels is proposed. In the time-range investigated (up to 70-90 ps), the comparison of the data with calculations according to simple phenomenological models favours the formalism of the time-dependent perturbation theory of Abragam and Pound. It is shown, however, that a static interaction with a broad distribution of hyperfine frequencies may also describe the observed attenuation factors. In addition, a procedure is suggested which allows to correct for the deorientation effect recoil-distance Doppler-shift data obtained with only one detector. [References: 36]
机译：在重离子诱导的反应中产生的Ba-128和Xe-122原子核中，采用柱塞技术进行了脱取向作用的时差测量，并以约1.2％c的速度卷回到真空中。发现该效应可改变两个核中2（1）（+）和4（1）（+）能级消失的跃迁的角分布。为了便于分析实验衰减因子G（k）（exp）（t），提出了一种新的方法来处理较高进食水平下的排列损失。在所研究的时间范围（最高70-90 ps）中，根据简单现象学模型进行的数据比较和计算结果的比较有利于Abragam和Pound的时变摄动理论的形式化。然而，已经表明，具有广泛分布的超精细频率的静态相互作用也可能描述了观察到的衰减因子。另外，提出了一种程序，该程序允许校正仅通过一个检测器获得的脱取向效应后坐距离多普勒频移数据。 [参考：36]

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