| Project/Area Number |
11680511
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | UNIVERSITY OF TSUKUBA |
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Principal Investigator |
TAGISHI Yoshihiro University of Tsukuba, Inst.Phys., Assoc.Prof., 物理学系, 助教授 (70015551)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | Diffusion / Deuteron fusion reaction / Deuteron implantation / フレーキング |
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| Research Abstract |
The emission of protons with energies about 3 MeV is observed during bombardment with a deuteron beam with energy of about 100 keV in various materials. These protons are those emitted from the reaction of D (d, p) T between the implanted deuterium atoms and incident deuterons. We proposed a new technique for measurement of diffusion of the implanted deuterium atoms in various materials by using a deuteron fusion reaction. By measuring the yield of the emitted protons from D (d, p) T reaction as a function of time from the beginning of the bombardment, we can obtain the information of the time dependence of the density of deuterium atoms near surface region. And furthermore, we can know the longitudinal distribution of the implanted deuterium atoms from the proton energy spectrum. Because, as a result of the kinematics of the reaction, the emitted proton-energy changes as change of the deuteron energy at the reaction point. Especially at backward angle, such an effect is large. Number of the emitted protons was recorded with a multichannel analyzer operated in the multichannel scaling mode (MCS) through bombarding with a continuous deuteron beam. We can extract the information of the diffusion of the implanted deuterium atoms in each target material from this MCS spectra. It was found that the MCS spectra presented a quite difference between the single-crystal and polycrystal for various kind of the metallic elements. It means that the diffusion of the implanted deuterium atoms is quite sensitive to the crystal structure. A further quantitative measurements and analysis are now in progress.
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