A Phenomenological Model for Positron Trapping at Dislocations

Xiong Liangyue

Chinese Physics C> 1988, Vol. 12> Issue(S1) : 9-18

A Phenomenological Model for Positron Trapping at Dislocations

Xiong Liangyue

Institute of Metal Research, Academia Sinica, Shenyang

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A multi-state trapping model involving positron trapping at dislocations and jogs is proposed, in which effect of positron detrapping can be omitted. According to this mcxJel the dislocations with variant jog density have different functions in positron annihilation process. The case that dislocation trapping is predominant and the open-space ratio between dislocation core and singlevacancy is emphatically discussed. Using the data in some literatures, we have estimated the positron annihilated rate at dislocations and the jog interval on the dislocation line. The results obtained seem reasonable.

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Xiong Liangyue. A Phenomenological Model for Positron Trapping at Dislocations[J]. Chinese Physics C, 1988, 12(S1): 9-18.

Xiong Liangyue. A Phenomenological Model for Positron Trapping at Dislocations[J]. Chinese Physics C, 1988, 12(S1): 9-18. shu

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Received: 1987-04-10

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The project is supported by the Science Foundation of Academia Sinica.

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沈阳化工大学材料科学与工程学院沈阳 110142

A Phenomenological Model for Positron Trapping at Dislocations

Institute of Metal Research, Academia Sinica, Shenyang

Received Date: 1987-04-10

Fund Project: The project is supported by the Science Foundation of Academia Sinica.

Abstract: A multi-state trapping model involving positron trapping at dislocations and jogs is proposed, in which effect of positron detrapping can be omitted. According to this mcxJel the dislocations with variant jog density have different functions in positron annihilation process. The case that dislocation trapping is predominant and the open-space ratio between dislocation core and singlevacancy is emphatically discussed. Using the data in some literatures, we have estimated the positron annihilated rate at dislocations and the jog interval on the dislocation line. The results obtained seem reasonable.

A Phenomenological Model for Positron Trapping at Dislocations

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