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Journal Articles

Strong anti-stokes luminescence from H$$^{+}$$-irradiated diamond

Xu, Y.; Naramoto, Hiroshi; Narumi, Kazumasa; Miyashita, Kiyoshi*; Kamiya, Tomihiro; Sakai, Takuro

Applied Physics Letters, 83(10), p.1968 - 1970, 2003/09

https://doi.org/10.1063/1.1608465
 Times Cited Count：7 Percentile：27.33(Physics, Applied)

no abstracts in English

Journal Articles

${it S}$$$_{e}$$-scaling of lattice parameter change in high ion-velocity region (${it v}$ $$geq$$ 2.6$$times$$10$$^{9}$$ cm/s) in ion-irradiated EuBa$$_{2}$$Cu$$_{3}$$O$$_{y}$$

Ishikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Michikami, Osamu*; Wakana, Hironori*; Hashimoto, Takeo*; Kambara, Tadashi*; M$"u$ller, C.*; Neumann, R.*

Nuclear Instruments and Methods in Physics Research B, 193(1-4), p.278 - 282, 2002/06

https://doi.org/10.1016/S0168-583X(02)00774-7
 Times Cited Count：8 Percentile：46.18(Instruments & Instrumentation)

Swift heavy ions with wide energy range of 80MeV-3.84GeV have been irradiated to EuBa$$_{2}$$Cu$$_{3}$$O$$_{y}$$ oxide superconductors, and the lattice parameter change due to elecronic excitation has been measured. In the high ion-velocity region, the change in lattice parameter per unit fluence varies as the 4th power of the electronic stopping power. However, in the low-velocity region, the deviation from the 4th power dependence is observed. The results are analyzed by using the primary ionization rate, and it is found that the results support that the Coulomb explosion triggers the atomic displacements.

JAEA Reports

Effects of primary recoil (PKA) energy spectrum on radiation damage in FCC metals

Iwata, Tadao*; Iwase, Akihiro

JAERI-Research 97-073, 45 Pages, 1997/10

JAERI-Research-97-073.pdf:1.55MB

no abstracts in English

Journal Articles

Micro profile of the chemical structure in ion-beam irradiation effects for some polyolefins

Hama, Yoshimasa*; ; Hamanaka, Kenichi*; Matsumoto, Hideya*; Kudo, Hisaaki; Sasuga, Tsuneo; Seguchi, Tadao;

Proceedings of of the Yayoi Symposium on Ion-Beam Radiation Chemistry; NIRS-M-101, HIMAC-007, 0, p.9 - 12, 1994/00

no abstracts in English

Journal Articles

Effect of electron-excitation on ion-irradiation damage in metals

Iwase, Akihiro; Iwata, Tadao; Nihira, Takeshi*

Nihon Butsuri Gakkai-Shi, 48(4), p.274 - 278, 1993/04

http://ci.nii.ac.jp/naid/110002077898

no abstracts in English

Journal Articles

Defect production by electron excitation in Cu and Ag

Iwase, Akihiro; Iwata, Tadao; Nihira, Takeshi*

Journal of the Physical Society of Japan, 61(11), p.3878 - 3882, 1992/11

https://doi.org/10.1143/JPSJ.61.3878
 Times Cited Count：13 Percentile：65.76(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Non-ohmic resistive state in ion-irradiated YBa$$_{2}$$Cu$$_{3}$$O$$_{7-x}$$

Iwase, Akihiro; ; Iwata, Tadao; Nihira, Takeshi*

Physica C, 174, p.321 - 328, 1991/00

https://doi.org/10.1016/0921-4534(91)91563-J
 Times Cited Count：8 Percentile：50.71(Physics, Applied)

no abstracts in English

Oral presentation

Mechanical property evaluation on irradiated materials with gradient damage distribution

Sakai, Tomoki*; Wakui, Takashi; Saito, Shigeru; Futakawa, Masatoshi; Mori, Kotaro*

no journal, , 

One of dominant factors to determine the lifetime of components used under the high-radiation environment is the radiation damage of materials and then understanding of the radiation damage is very important. Although ion irradiation has been conducted as the method simulating the radiation damage, the damaged area is limited to the surface layer of the specimen and has the gradient damage distribution. Micro-indentation tests with a Berkovich indenter were conducted in irradiated and unirradiated area on ion irradiated specimens and the micro-hardness was estimated from load and depth curve. The micro-hardness increased by the irradiation. The micro-hardness increased further under the irradiation condition that hydrogen ion and helium ion were added. On the other hand, the micro-hardness decreased with increasing irradiated temperature.

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