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| 11. |
A positron annihilation study of radiation damage in pure aluminium induced by ion bombardment |
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Radiation Effects,
Volume 24,
Issue 1,
1975,
Page 65-66
U. Engman,
B. Holmqvist,
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摘要:
Since a few years ago it has been well known1that reactor construction materials which are exposed to high neutron fluences, i.e. about 1022neutrons/cm2, will undergo density changes caused by creation and growth of voids. The void formation is accompanied by swelling of the material, an effect which can be as large as several per cent. However, it takes more than a year of irradiation time in a high flux reactor to reach the necessary neutron dose for the creation of such large void effects making systematic studies very time consuming. It is therefore convenient to simulate radiation damage, for instance by ion implantation, using the fact that the cross section for the ion-nucleus interaction is several orders of magnitude larger than that of the neutron-nucleus interaction. Thus a radiation damage comparable with that obtained in a high flux reactor can be produced after only a few hours or days of accelerator irradiation.
ISSN:0033-7579
DOI:10.1080/00337577508239480
出版商:Taylor & Francis Group
年代:1975
数据来源: Taylor
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| 12. |
Divacancy-like temperature transformation stage at 230 K in electron-irradiated N-type germanium |
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Radiation Effects,
Volume 24,
Issue 1,
1975,
Page 67-68
A. Jaworowski,
H. Rzewuski,
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PDF (113KB)
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ISSN:0033-7579
DOI:10.1080/00337577508239481
出版商:Taylor & Francis Group
年代:1975
数据来源: Taylor
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| 13. |
Damage recovery in vanadium between 3.8-6.0 K |
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Radiation Effects,
Volume 24,
Issue 1,
1975,
Page 69-70
R.R. Coltman,
C.E. Klabunde,
J.K. Redman,
J.M. Williams,
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PDF (127KB)
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摘要:
The isochronal recovery of thermal neutron damage in V was recently studied1from 6–320 K by means of resistivity changes. One interesting result was the observation of continuous recovery from 6–40 K in contrast to the spectra of discrete recovery processes seen at low temperatures for thermal neutron damage in nearly all other metals studied. The absence of recovery rate peaks in this low temperature range led to the speculation that the onset of recovery in V may occur by means of long-range interstitial migration rather than the collapse of close Frenkel pairs which is believed to initiate the recovery in most other metals. Another possibility is that close pair recovery in V occurs below 6 K. This speculation is not unreasonable, since recovery below 6 K has been observed in Au, Cd, In, and Zn.2In the case of Cd, a large recovery rate peak occurs at 5.2 K with a subpeak at 3.6 K.3In this report, we give results of an investigation which extends the recovery study of thermal neutron damage in V to 3.8 K.
ISSN:0033-7579
DOI:10.1080/00337577508239482
出版商:Taylor & Francis Group
年代:1975
数据来源: Taylor
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