Al$sup 26$ DECAY SCHEME
Al$sup 26$ DECAY SCHEME
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Al$sup 26$ 腐烂计划
DOI：
10.1103/physrev.112.1238
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发表时间：
1958
期刊：
影响因子：
--
通讯作者：
J. M. Ferguson
中科院分区：
文献类型：
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作者：
J. M. Ferguson
用闪烁谱仪研究了Al/sup 26/的长寿命基态β和γ辐射的能量和强度。正电子光谱是使用塑料闪烁体与4 π几何形状，并被发现有一个禁止的形状和端点的1.160 ± 0.048兆电子伏。正电子与能量为1.84 ± 0.01 Mev的伽马射线重合，这可能来自Mg/sup 26/的第一激发能级。还有一种弱伽马射线，能量为1.10 ± 0.05 Mev。与184兆电子伏的伽马射线相吻合相对于1.84兆电子伏的伽马射线，其强度为0.03。这将是从Mg/sup 26/的第二激发能级开始的，Al/sup 26/通过电子捕获弱地衰减到该第二激发能级。没有发现其他伽马射线。脉冲高度谱在700 kev处出现的峰值似乎是由于散射效应而不是γ射线的峰值。（auth）
The energies and intensities of the beta and gamma radiations from the long-lived ground level of Al/sup 26/ were studied with scintillation spectrometers. The positron spectrum was obtained using a plastic scintillator with 4 pi geometry and was found to have a forbidden shape and an endpoint of 1.160 plus or minus 0.048 Mev. The positrons are in coincidence with a gamma ray with an energy of 1.84 plus or minus 0.01 Mev, which is presumably from the first excited level of Mg/sup 26/. There is also a weak gamma ray with an energy of 1.10 plus or minus 0.05 Mev. in coincidence with the 184-Mev gamma ray. and with an intensity of 0.03 relative to the 1.84-Mev gamma ray. This would be from the second excited level of Mg/sup 26/, to which the Al/sup 26/ decays weakly by electron capture. No other gamma rays are observed. It appears that a peak in the pulseheight spectrum at 700 kev is due to scaitering effects rather ihan a gamma-ray photopeak. (auth)