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Journal Articles

Equilibrium and non-equilibrium charge-state distributions of 2.0 MeV/u carbon ions passing through carbon foils

Imai, Makoto*; Sataka, Masao*; Matsuda, Makoto; Okayasu, Satoru; Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Komaki, Kenichiro*; Shibata, Hiromi*; Nishio, Katsuhisa

Nuclear Instruments and Methods in Physics Research B, 354, p.172 - 176, 2015/07

 Times Cited Count:14 Percentile:75.98(Instruments & Instrumentation)

Both equilibrium and non-equilibrium charge-state distributions were studied experimentally for 2.0 MeV/u carbon ions after passing through carbon foils. Measured charge-state distribution established the equilibrium at a target thickness of 10 $$mu$$g/cm$$^{2}$$ and this remained unchanged until a maximum target thickness of 98 $$mu$$g/cm$$^{2}$$. The equilibrium charge-state distribution, the equilibrium mean charge-state, and the width and skewness of the equilibrium distribution were compared with predictions using existing semi-empirical formulae as well as simulation results, including the ETACHA code. It was found that charge-state distributions, mean charge states, and distribution widths for C$$^{2+}$$, C$$^{3+}$$, and C$$^{4+}$$ incident ions merged into quasi-equilibrium values at a target thickness of 5.7 $$mu$$g/cm$$^{2}$$ in the pre-equilibrium region and evolved simultaneously to the "real equilibrium" values for all of the initial charge states, including C$$^{5+}$$ and C$$^{6+}$$ ions. Two kinds of simulation, ETACHA and solution of rate equations taking only single electron transfers into account, were used, and both of them reproduced the measured charge evolution qualitatively. The quasi-equilibrium behavior could be reproduced with the ETACHA code, but not with solution of elementary rate equations.

Journal Articles

Charge state evolution of 2MeV/u sulfur ion passing through thin carbon foil

Imai, Makoto*; Sataka, Masao; Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Komaki, Kenichiro*; Shibata, Hiromi*; Sugai, Hiroyuki; Nishio, Katsuhisa

Nuclear Instruments and Methods in Physics Research B, 256(1), p.11 - 15, 2007/03

 Times Cited Count:6 Percentile:45.75(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Charge state distribution and its equilibration of 2 MeV/u sulfur ions passing through carbon foils

Imai, Makoto*; Sataka, Masao; Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Komaki, Kenichiro*; Shibata, Hiromi*; Sugai, Hiroyuki; Nishio, Katsuhisa

Nuclear Instruments and Methods in Physics Research B, 230(1-4), p.63 - 67, 2005/04

 Times Cited Count:8 Percentile:52.97(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Ejected electron spectra from highly excited states in high-energy collisions of O$$^{q+}$$ with He

Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Imai, Makoto*; Sataka, Masao; Komaki, Kenichiro*; Shibata, Hiromi*

Nuclear Instruments and Methods in Physics Research B, 205, p.528 - 532, 2003/05

 Times Cited Count:4 Percentile:33.73(Instruments & Instrumentation)

Auger and Coster-Kronig electron spectra from highly excited states produced by low-energy highly charged ions with gas targets have been investigated both theoretically and experimentally. In this case, the highly excited states were formed by electron capture processes. We have studied collision processes of high-energy highly charged ions with a gas target using zero-degree electron spectroscopy at the tandem accelerator of JAERI, Tokai. In the present, we have measured Auger and C-K electron spectra from highly excited states produced by 1-3 MeV/u O$${q+}$$ (q=3-5) + He collisions, where the highly excited states in Oq+ ions were formed by electron excitation. We have compared and discussed the Auger and C-K electron spectra obtained by electron-capture and electron-excitation processes. It is found that the C-K spectra for high-energy Oq+ ions show relatively low-l states and the Auger spectra also have different structures from those for low-energy highly charged Oq+ ions.

Journal Articles

Angular momentum distributions of Rydberg state electrons of Be-like sulfur produced through foil penetration

Imai, Makoto*; Sataka, Masao; Kitazawa, Shinichi; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Shibata, Hiromi*; Tawara, Hiroyuki*; Azuma, Toshiyuki*; Kanai, Yasuyuki*; Yamazaki, Y.*

Nuclear Instruments and Methods in Physics Research B, 193(1-4), p.674 - 679, 2002/06

 Times Cited Count:5 Percentile:34.75(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Comprehensive theoretical and experimental analysis of Coster-Kronig electron spectra from 64-MeV S$$^{12+}$$ ions excited through He gas and C-foil targets

Sataka, Masao; Imai, Makoto*; Kawatsura, Kiyoshi*; Komaki, Kenichiro*; Tawara, Hiroyuki*; Vasilyev, A.*; Safronova, U. I.*

Physical Review A, 65(5), p.052704_1 - 052704_11, 2002/05

 Times Cited Count:13 Percentile:52.54(Optics)

no abstracts in English

Journal Articles

Coster-Kronig electrons from the autoionizing Rydberg states of 2 MeV u$$^{-1}$$ Si$$^{5+}$$ ions excited through a thin C-foil target

Sataka, Masao; Imai, Makoto*; Kawatsura, Kiyoshi*; Komaki, Kenichiro*; Tawara, Hiroyuki*; Vasilyev, A.*; Safronova, U. I.*

Journal of Physics B; Atomic, Molecular and Optical Physics, 35(2), p.267 - 281, 2002/01

 Times Cited Count:3 Percentile:19.81(Optics)

no abstracts in English

Journal Articles

Ejected electron spectra from highly charged oxygen ions in collisions with foils and gas atoms

Kitazawa, Shinichi; Sataka, Masao; Tawara, Hiroyuki*; Imai, Makoto*; Shibata, Hiromi*; Komaki, Kenichiro*; Azuma, Toshiyuki*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*

Atomic Collision Research in Japan, No.25, p.65 - 67, 1999/00

no abstracts in English

Journal Articles

Binary peak electrons observed at 0° for 2-4 MeV/u F$$^{q+}$$, Si$$^{q+}$$ and Ni$$^{q+}$$ ions in collisions with a He target

Sataka, Masao; Imai, Makoto; *; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*; *

Nuclear Instruments and Methods in Physics Research B, 79, p.81 - 84, 1993/00

 Times Cited Count:6 Percentile:57.52(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Dynamical behaviour of angular momentum distributions of autoionizing Is$$^{2}$$ 2p9l states of S$$^{12+}$$ ions excited through carbon foils

Imai, Makoto; Sataka, Masao; Naramoto, Hiroshi; *; Komaki, Kenichiro*; Kawatsura, Kiyoshi*; Kanai, Yasuyuki*

Nuclear Instruments and Methods in Physics Research B, 67, p.142 - 145, 1992/00

 Times Cited Count:12 Percentile:73.4(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Binary encounter peaks for 0° electrons in collisions between 2 MeV/amu Si$$^{q+}$$ and He

P.Hvelplund*; *; Komaki, Kenichiro*; *; *; *; Kawatsura, Kiyoshi*; Sataka, Masao; Imai, Makoto; Kanai, Yasuyuki*; et al.

Journal of the Physical Society of Japan, 60(11), p.3675 - 3678, 1991/11

 Times Cited Count:9 Percentile:62.54(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

High-resolution Auger spectroscopy of Na-like argon and sulfur ions singly excited in high-energy collisions with light target atoms

I.Kadar*; H.Altevogt*; R.Koehrbrueck*; V.Montemayor*; A.Mattis*; G.Schiwietz*; B.Skogvall*; K.Sommer*; N.Stolterfoht*; Kawatsura, Kiyoshi*; et al.

Physical Review A, 44(5), p.2900 - 2912, 1991/09

 Times Cited Count:5 Percentile:39.1(Optics)

no abstracts in English

Journal Articles

High Rydberg and Auger electrons from fast projectile ions studied by zero-degree electron spectroscopy

Kawatsura, Kiyoshi*; Sataka, Masao; Naramoto, Hiroshi; Imai, Makoto; Komaki, Kenichiro*; *; *; Kanai, Yasuyuki*; Kambara, Tadashi*; *; et al.

Nuclear Instruments and Methods in Physics Research B, 53(4), p.421 - 425, 1991/04

 Times Cited Count:16 Percentile:83.06(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Angular-momentum distribution of autoionizing Rydberg states of 64 MeV S ions produced by collisions with He and C foils

Kawatsura, Kiyoshi*; Sataka, Masao; *; Komaki, Kenichiro*; Kanai, Yasuyuki*; Naramoto, Hiroshi; *; Kambara, Tadashi*; *; Nakai, Yota; et al.

Nuclear Instruments and Methods in Physics Research B, 48, p.103 - 106, 1990/00

 Times Cited Count:17 Percentile:82.13(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Measurements of beam-foil spectra of highly ionized chlorine ions in the region of 160-260 AA

Sataka, Masao; Ozawa, Kunio*; Kawatsura, Kiyoshi; *; Komaki, Kenichiro*; Naramoto, Hiroshi; *; Nakai, Yota; *

Journal of the Physical Society of Japan, 57(10), p.3352 - 3356, 1988/10

no abstracts in English

Journal Articles

Correlation between charge states and scattering angles of 150MeV $$^{37}$$C1 ions exiting from carbon foils

*; *; Kawatsura, Kiyoshi; Sataka, Masao; Ozawa, Kunio*; Komaki, Kenichiro*; *; *

Nuclear Instruments and Methods in Physics Research B, 33, p.230 - 234, 1988/00

 Times Cited Count:0 Percentile:0.02(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Molecular effects in KL$$^{n}$$ multiple ionization of Al for H$$^{+}$$ and H$$_{2+}$$ ion impacts

*; Kawatsura, Kiyoshi; Komaki, Kenichiro*; *; *; Shibata, Hiromi*

Nuclear Instruments and Methods in Physics Research B, 33, p.304 - 307, 1988/00

 Times Cited Count:1 Percentile:40.26(Instruments & Instrumentation)

no abstracts in English

Oral presentation

Non-equilibrium charge state distribution of 2.0 MeV/u S ion after passing through Carbon fiol

Imai, Makoto*; Sataka, Masao; Kawatsura, Kiyoshi*; Takahiro, Katsumi*; Komaki, Kenichiro*; Shibata, Hiromi*; Sugai, Hiroyuki; Nishio, Katsuhisa

no journal, , 

no abstracts in English

18 (Records 1-18 displayed on this page)
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