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2000 Vol. 17, No. 3

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Cross Discipline
SHIM physics Study at IMP
JIN Gen-ming, JIN Yun-fan
2000, 17(3): 127-128. doi: 10.11804/NuclPhysRev.17.03.127
Abstract(1793) PDF (869KB)(538)
Abstract:
Swift Heavy Ion in Matter(SHIM) physics and its new progresses of research in the world in recent ten years were briefly introduced. The results obtained on SHIM physics including strong electronic excitation effect in solid materials and its applications, as well as highly charged state atomic physics, obtained by Institute of Modern Physics, the Chinese Academy of Sciences were mainly introduced. The tendency of the discipline in future was presented.
Irradiation Effects in Polymers Induced by Swift Heavy Ions
ZHU Zhi-yong, JIN Yun-fan, TANG Yu-hua, LIU Chang-long, SUN You-mei
2000, 17(3): 129-133. doi: 10.11804/NuclPhysRev.17.03.129
Abstract:
The irradiation effects in polymers induced by swift heavy ions were reviewed in comparison with that induced by low ionization particles based on the characteristics of swift heavy ion irradiations. It is shown that bond breaking and cross linking, gas releasing, amorphization and carbonization of polymers depend strongly on the electronic energy loss. Besides special effects such as alkynes production, can be induced under swift heavy ion irradiation. The perspectives...
Irradiation Effect In C60 Films Induced by Energetic Ions
JIN Yun-fan, YANG Ru, WANG Yan-bin, LIU Chang-long, LIU Jie, HOU Ming dong, YAO Jiang-hong
2000, 17(3): 134-139. doi: 10.11804/NuclPhysRev.17.03.134
Abstract:
Irradiation effecs (mainly including transformation from crystalline into amorphous state) of C 60 films induced by 120 keV H, He, N, Ar, Fe and Mo ions, 240 keV and 360 keV Ar ions, and 171.2 MeV, 125.3 MeV and 75.8 MeV S ions were analysed by means of Raman scattering and XPS technique. The analysis results indicate that amorphization process in the cases of N, Ar, Fe and Mo ions irradiation is dominated by nuclear collision, but in the case of H ion irradiation, the process is...
Radiation Damage in Silicon Induced by Ion Irradiation
LIU Chang-long, ZHU Zhi-yong, HOU Ming-dong, JIN Yun-fan, WANG Zhi-guang
2000, 17(3): 140-145. doi: 10.11804/NuclPhysRev.17.03.140
Abstract:
The radiation damage in silicon induced by low energy ion implantation was briefly reviewed together with a short introduction to the common techniques in the area. The damage characteristics of swift heavy ion irradiation in silicon and its investigations were introduced with emphasis on the effects induced by processes of electronic energy losses. It is shown that swift heavy ion can induce defects far beyond the projected range and up to 28 MeV/μm the electronic energy ...
Plastic Deformation of Amorphous Materials Induced by Swift Heavy Ion
HOU Ming-dong
2000, 17(3): 146-151. doi: 10.11804/NuclPhysRev.17.03.146
Abstract:
A very peculiar effect occurring when an amorphous material is irradiated with swift heavy ion is the giant plastic deformation phenomenon discovered in the eighties by Klaumunzer[DD(-8/9]¨ It is macroscopically visible atomic rearrangements induced by electronic energy loss. This effect occurs only in truly amorphous solids and can not occur in a crystalline material. This phenomenon gives rise to a wide ranging and lasting research in the field of the interaction of swift heavy...
Theoretical Expressions of High energy Heavy ion Irradiation Induced Effects in Metallic Materials
WANG Zhi-guang, JIN Yun-fan
2000, 17(3): 152-158. doi: 10.11804/NuclPhysRev.17.03.152
Abstract:
Experimental results showed that, for high energy heavy ion irradiations, electronic energy loss could play a dominant role in damage process in solid materials. In order to explain the experimental phenomena and results, a series of theoretical models based on Coulomb explosion or thermal spike mechanisms have been proposed. In the present paper, more attention was paid to theoretical expressions of high energy heavy ion irradiation induced effects in metallic materials ...
Electron Emission from Solids Induced by Swift Heavy Ions
XIAO Guo-qing
2000, 17(3): 159-164. doi: 10.11804/NuclPhysRev.17.03.159
Abstract:
The recent progresses in experimental and theoretical studies of the collision between swift heavy ion and solids as well as electron emission induced by swift heavy ion in solids were briefly reviewed. Three models, Coulomb explosion, thermal spike and repulsive long lived states, for interpreting the atomic displacements stimulated by the electronic energy loss were discussed. The experimental setup and methods for measuring the electron emission from solids were described ...
Single Event Effects Induced by Heavy Ion in Semiconductor Device
HOU Ming-dong, ZHEN Hong-lou, ZHANG Qing-xiang, LIU Jie, MA Feng
2000, 17(3): 165-170. doi: 10.11804/NuclPhysRev.17.03.165
Abstract:
Single event effects (SEE ′s) have been observed in semiconductor device in space since 1975. It has been verified from many spaceflight tests that single event effect induced by cosmic ray is one of the important sources of anomalies and malfunctions of spacecraft. Initially, a brief outline of space radiation environment is given. The history and recent trends were described, and basic methods and necessary facilities for SEE testing were also discussed. Finally, the research ...
Synthesis of C-N Compounds
XIE Er-qing, JIN Yun-fan, WANG Zhi-guang, HE De-yan
2000, 17(3): 171-174. doi: 10.11804/NuclPhysRev.17.03.171
Abstract:
Diamond films were implanted with 50-110 keV N ions to the dosage of 1×10 17 ions/cm 2 at the temperature below 80 °C . The possibility of the formation of C N compounds in diamond films was investigated by means of X ray photoelectron spectroscopy (XPS), X ray diffraction analysis (XRD), Fourier transform infrared absorption spectroscopy (FTIR) and Raman spectroscopy. New evidence has been presented that plenty of C-N single bonds which are necessary ...
Mòssbauer Spectroscopy Study of Irradiation Effects Induced by Swift Heavy Ions in Solid Materials
CHEN Xiao-xi, JIN Yun-fan, WANG Zhi-guang
2000, 17(3): 175-178. doi: 10.11804/NuclPhysRev.17.03.175
Abstract:
Mssbauer spectroscopy study of irradiation effects induced by swift heavy ions in solid materials were briefly presented.Amorphization phenomenon of yttrium iron garnet irradiated by 1 GeV Ar ions has been investigated. For the first time, the nearly complete amorphous state was observed. Stainless steel 316L samples were irradiated with 54 MeV C ions and phase transformation of the samples was observed. HT 9 ferrite steel was irradiated with 510 MeV C ions. Its phase...
Multiple Ionization in Partially Stripped Ion atom Collisions
CAI Xiao-hong, MA Xin-wen, LIU Hui-ping, YANG Zhi-hu, YU De-yang, CHEN Xi-meng, LIU Zhao-yuan, SHEN Zi-yong, LU-kui
2000, 17(3): 179-182. doi: 10.11804/NuclPhysRev.17.03.179
Abstract:
The partially stripped C q+ , O q+ and F q+ ions (q=1-4) delivered by a 2×1.7 MV tandem accelerator were employed to bombard He, Ne and Ar targets. The cross section ratios of multiple ionization to single ionization were measured for different collision systems by using time of flight technique. The effective charge effects and charge exchange processes were studied. By using an effective charge q eff , the multiple ionization processes induced by partially stripped ions could...
Measurements of Excitation Spectra of Highly Charged Atoms
YANG Zhi-hu, SU Hong, MA Xin-wen, LIU Hui-ping, WANG You-de
2000, 17(3): 183-188. doi: 10.11804/NuclPhysRev.17.03.183
Abstract:
The excitation spectra and level lifetimes of highly charged atoms for heavier elements of Ne, S and Ar have been measured by using the beam foil method on the heavy ion accelerator in Lanzhou. Emission spectra in the wavelength region of 25-400  was studied. On the whole, the agreement between our experimental results and other experiments is fairly good.
Letter
Photoluminescences of SiO2 Irradiated by Heavy Ion
WANG Zhi-guang, JIN Yun-fan, XIE Er-qing, CHEN Xiao-xi, ZHU Zhi-yong, HOU Ming-dong
2000, 17(3): 189-190. doi: 10.11804/NuclPhysRev.17.03.189
Abstract(1679) PDF (631KB)(526)
Abstract: