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Journal Articles

Minor actinide neutron capture cross-section measurements with a 4$$pi$$ Ge spectrometer

Koizumi, Mitsuo; Osa, Akihiko; Toh, Yosuke; Kimura, Atsushi; Mizumoto, Motoharu; Oshima, Masumi; Igashira, Masayuki*; Osaki, Toshiro*; Harada, Hideo*; Furutaka, Kazuyoshi*; et al.

Nuclear Instruments and Methods in Physics Research A, 562(2), p.767 - 770, 2006/06

 Times Cited Count:6 Percentile:45.27(Instruments & Instrumentation)

In order to measure the neutron capture cross section of minor actinides, we have proposed the use of a 4$$pi$$ Ge spectrometer. A Time-of-Flight neutron beam line for the experiment has been constructed at the KURRI electron LINAC. The assembling of the 4$$pi$$ Ge spectrometer is in progress. We are also developing a new data acquisition system based on a digital processing technique.

Journal Articles

Electron capture processes in low energy collisions of C$$^{4+}$$ ions with excited H atoms

Shimakura, Noriyuki*; Homma, Mayumi*; Kubo, Hirotaka

Journal of Plasma and Fusion Research SERIES, Vol.7, p.199 - 202, 2006/00

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:7 Percentile:50.55(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Extended description for electron capture in ion-atom collisions; Application of model potentials within the framework of the continuum-distorted-wave theory

Guly$'a$s, L.*; Fainstein, P. D.*; Shirai, Toshizo

Physical Review A, 65(5), p.052720_1 - 052720_9, 2002/05

 Times Cited Count:12 Percentile:51.23(Optics)

We perform an extension of the continuum-distorted-wave (CDW) approximation for single electron capture by introducing model potentials to describe the interaction of the active electron with the residual-target and projectile ions. The cross sections for electron transfer in collisions of bare and dressed projectile ions with H and He atoms are calculated and compared with experimental data and previous CDW calculations that make use of approximate analytical wave functions to represent the active electron initial and final states. For electron capture in proton-He collisions into definite final states the present calculations are in better agreement with experiments. We trace the differences in the results from both models to a different behavior at projectile scattering angles close to the Thomas peak.

Journal Articles

Polarization of photons emitted in radiative electron capture by bare high-Z ions

Eichler, J.*; Ichihara, Akira

Physical Review A, 65(5), p.052716_1 - 052716_5, 2002/05

 Times Cited Count:18 Percentile:62.62(Optics)

no abstracts in English

Journal Articles

Electron spectroscopy of doubly excited states in He produced by slow collisions of He$$^{2+}$$ ions with Ba atoms

Iemura, K.*; Otani, Shunsuke*; Suzuki, H.*; Takeda, Junichi*; Machida, Shuichi*; Tanabe, K.*; Takayanagi, Toshinobu*; Wakiya, K.*; Sekiguchi, M.*; Kanai, Yasuyuki*; et al.

Physical Review A, 64(6), p.062709_1 - 062709_14, 2001/12

 Times Cited Count:6 Percentile:36.62(Optics)

We measured ejected electron spectra caused by autoionization of doubly excited states in He atoms; the excited He was made by double electron capture of low-energy He$$^{2+}$$ ions colliding with Ba atoms. Measurements were performed by means of zero degree electron spectroscopy at projectile energies from 40 to 20 keV. Electron spectra due to autoionization from the states He(2lnl) to He+(1s) for n$$geq$$2, and those from He(3lnl) to He$$^+$$(2s or 2p) for n$$geq$$3, were observed. Line peaks in the spectra were identified by comparing observed electron spectra with those of several theoretical calculations. It was found that doubly excited states of relatively high angular momenta such as the D and F terms were conspicuously created in a quite different manner from the cases of the production of doubly excited states by the use of photon, electron, or ion impacts on neutral He atoms. Rydberg states with large n values were observed with high population in both the He(2lnl) and He(3lnl) series.

Journal Articles

Alignment caused by photoionization and in radiative electron capture into excited states of hydrogenic high-Z ions

J.Eichler*; Ichihara, Akira; Shirai, Toshizo

Physical Review A, 58(3), p.2128 - 2135, 1998/09

 Times Cited Count:34 Percentile:82.24(Optics)

no abstracts in English

Journal Articles

Strong alignment observed for the time-reversed photoionization process studied in relativistic collisions with bare uranium ions

T.Stoehlker*; J.Eichler*; Ichihara, Akira; Shirai, Toshizo; R.W.Dunford*; T.Ludziejewski*; P.Rymuza*; Z.Stachura*; P.Swiat*; A.Warczak*; et al.

Physical Review Letters, 79(17), p.3270 - 3273, 1997/10

 Times Cited Count:61 Percentile:89.89(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic field effects on electron capture processes by highly charged ions: Collisions of B$$^{4+}$$ ions with H atoms

*; Shirai, Toshizo; Shimakura, N.*

Phys. Scr., T73, p.110 - 111, 1997/00

 Times Cited Count:1 Percentile:19.53(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Radiative electron capture and the photoelectric effect at high energies

Ichihara, Akira; Shirai, Toshizo; J.Eichler*

Physical Review A, 54(6), p.4954 - 4959, 1996/12

 Times Cited Count:32 Percentile:81.5(Optics)

no abstracts in English

Journal Articles

Single-, double- and triple-electron capture cross sections for multicharged slow carbon ions in H$$_{2}$$,CH$$_{4}$$,C$$_{2}$$H$$_{6}$$,C$$_{3}$$H$$_{8}$$ and CO$$_{2}$$ molecules

Ito, Akio*; Imanishi, Nobutsugu*; *; Hamamoto, Nariaki*; *; Tanaka, Takashi*; *; Saito, Manabu*; Haruyama, Yoichi*; Shirai, Toshizo

Journal of the Physical Society of Japan, 64(9), p.3255 - 3264, 1995/09

 Times Cited Count:20 Percentile:71.49(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Photon angular distributions from radiative electron capture in relativistic atomic collisions

J.Eichler*; Ichihara, Akira; Shirai, Toshizo

Physical Review A, 51(4), p.3027 - 3035, 1995/04

 Times Cited Count:49 Percentile:90.34(Optics)

no abstracts in English

Journal Articles

Radiative electron capture studied in relativistic heavy-ion-atom collisions

Th.Stoehlker*; C.Kozhuharov*; P.H.Mokler*; A.Warczak*; F.Bosch*; H.Geissel*; R.Moshammer*; C.Scheidenberger*; J.Eichler*; Ichihara, Akira; et al.

Physical Review A, 51(3), p.2098 - 2111, 1995/03

 Times Cited Count:99 Percentile:96.48(Optics)

no abstracts in English

Journal Articles

Radiative electron capture in relativistic heavy-ion atom collisions

Th.Stoehlker*; F.Bosch*; H.Geissel*; T.Kandler*; C.Kozhuharov*; P.H.Mokler*; R.Moshammer*; P.Rymuza*; C.Scheidenberger*; Z.Stachura*; et al.

Nuclear Instruments and Methods in Physics Research B, 98, p.235 - 239, 1995/00

 Times Cited Count:6 Percentile:55.97(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Photon angular distribution of radiative electron capture into the M shell of He-like uranium ions at 110-140MeV/u

T.Kandler*; Th.Stoehlker*; P.H.Mokler*; C.Kozhuharov*; H.Geissel*; C.Scheidenberger*; P.Rymuza*; Z.Stachura*; A.Warczak*; R.W.Dunford*; et al.

Z. Phys., D, 35, p.15 - 18, 1995/00

no abstracts in English

Journal Articles

L-subshell resolved photon angular distribution of radiative electron capture into He-like uranium

Th.Stoehlker*; H.Geissel*; H.Irnich*; T.Kandler*; C.Kozhuharov*; P.H.Mokler*; G.Muenzenberg*; F.Nickel*; C.Scheidenberger*; T.Suzuki*; et al.

Physical Review Letters, 73(26), p.3520 - 3523, 1994/12

 Times Cited Count:36 Percentile:84.26(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Radiative electron capture in relativistic atomic collisions

Ichihara, Akira; Shirai, Toshizo; J.Eichler*

Physical Review A, 49(3), p.1875 - 1884, 1994/03

 Times Cited Count:74 Percentile:94.37(Optics)

no abstracts in English

JAEA Reports

Charge-changing collision cross sections of low-energy carbon ions with carbon containing molecules

Hamamoto, Nariaki*; Tanaka, Takashi*; Ito, Akio*; Imanishi, Nobutsugu*; Saito, Manabu*; Haruyama, Yoichi*; Shirai, Toshizo

JAERI-M 93-202, 45 Pages, 1993/10

JAERI-M-93-202.pdf:1.09MB

no abstracts in English

Journal Articles

Cross sections for electron capture in relativistic atomic collisions

Ichihara, Akira; Shirai, Toshizo; J.Eichler*

Atomic Data and Nuclear Data Tables, 55, p.63 - 79, 1993/09

 Times Cited Count:17 Percentile:71.64(Physics, Atomic, Molecular & Chemical)

no abstracts in English

JAEA Reports

Analytic cross sections for collisions of H, H$$_{2}$$, He and Li atoms and ions with atoms and molecules, I

Ito, Rinsuke*; Tabata, Tatsuo*; Shirai, Toshizo; R.A.Phaneuf*

JAERI-M 93-117, 91 Pages, 1993/06

JAERI-M-93-117.pdf:1.88MB

no abstracts in English

24 (Records 1-20 displayed on this page)