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Acta Metall Sin  2005, Vol. 41 Issue (1): 33-    DOI:
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Effects Of Twin Size On The Dislocation Configuration During Cyclic Deformation Of Polycrystalline Twin Copper
DENG Wen; RUAN Xiangdong; HUANG Yuyang;ZHOU Yin'e; ZHU Yingying; ZHU Yingying
Department of Physics; Guangxi University; Nanning 530004
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DENG Wen; RUAN Xiangdong; HUANG Yuyang; ZHOU Yin'e; ZHU Yingying; ZHU Yingying. Effects Of Twin Size On The Dislocation Configuration During Cyclic Deformation Of Polycrystalline Twin Copper. Acta Metall Sin, 2005, 41(1): 33-.

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Abstract  Doppler--broadening spectra of positron annihilation radiation of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn and Ga have been measured by using 2--detector coincidence technique. The lower background of the spectrum allows to obtain the contribution of annihilations with core electrons. The experiments show that the background decreases with increasing the distance between the sample and the Ge detector. The magnitude of the peak of the ratio curve of Ni (ratio to Al) increases with decreasing the background of the spectrum. For Ti, V, Cr, Mn, Fe, Co, Ni and Cu, the heights of the peaks in the ratio curves rise with increasing the number of 3d--electrons.
Key words:  positron annihilation      coincidence technique      background      
Received:  01 March 2004     
ZTFLH:  TG111.1  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I1/33

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