Search

Your search keyword '"Yuichi Ichikawa"' showing total 4 results
Start Over Author "Yuichi Ichikawa" Publisher hal ccsd
4 results on '"Yuichi Ichikawa"'

1. Spin-aligned RI beams via two-step fragmentation reactions

Author

G. Georgiev, Akihiro Yoshimi, Yuichi Ichikawa, T. Kubo, N. Aoi, Naoki Fukuda, K. Suzuki, H. Iijima, H. Hayashi, Dimiter L. Balabanski, M. Rajabali, Masayasu Ishihara, Tsubasa Nanao, J. M. Daugas, Hideki Ueno, T. Inoue, Masato Tsuchiya, Y. Ishii, Daisuke Kameda, R. Chevrier, Tetsuya Ohnishi, Hiroshi Watanabe, Koichiro Asahi, Takeshi Furukawa, H. Takeda, N. Inabe, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Nuclear moments, 010308 nuclear & particles physics, Chemistry, Two step, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Fragmentation (mass spectrometry), Present method, 0103 physical sciences, Nuclear spin, Figure of merit, Nuclear moment, Atomic physics, 010306 general physics, Spin (physics), Nuclear Experiment, RI beam, Instrumentation, Projectile fragmentation, Beam (structure)
Abstract

A method to produce spin-aligned rare isotope (RI) beams has been developed, where a scheme of twostep projectile fragmentation to produce the RI of interest with high spin alignment and a technique of momentum-dispersion matching are combined. Effectiveness of the present method was demonstrated in an experiment at the RIKEN RIBF, where an RI beam of 32Al with spin alignment of 8(1)% was successfully produced from a primary beam of 48Ca, via an intermediate RI of 33Al. Figure of merit of the present method was found to be more than 50 times greater than that of the conventional method employing single-step projectile fragmentation. ispartof: Nuclear Instruments & Methods in Physics Research B vol:317 pages:769-773 ispartof: location:JAPAN, RIKEN Nishina Ctr Accelerator Based Sci, Matsue status: published

Published
2013
Full Text
View/download PDF

2. Production of spin-controlled rare isotope beams

Author

N. Aoi, J. M. Daugas, R. Chevrier, G. Georgiev, Takeshi Furukawa, Hiroshi Watanabe, Masato Tsuchiya, Hideki Ueno, H. Hayashi, Y. Ishii, N. Inabe, T. Kubo, T. Inoue, Dimiter L. Balabanski, M. Rajabali, Tetsuya Ohnishi, Masayasu Ishihara, H. Iijima, Tsubasa Nanao, H. Takeda, Koichiro Asahi, Akihiro Yoshimi, Yuichi Ichikawa, Naoki Fukuda, K. Suzuki, Daisuke Kameda, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Light nucleus, Particle properties, Isotope, 010308 nuclear & particles physics, Nuclear structure, General Physics and Astronomy, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Chemical physics, 0103 physical sciences, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Spin (physics), Nuclear Experiment
Abstract

The degree of freedom of spin in quantum systems serves as an unparalleled laboratory where intriguing quantum physical properties can be observed, and the ability to control spin is a powerful tool in physics research. We propose a novel method for controlling spin in a system of rare isotopes which takes advantage of the mechanism of the projectile fragmentation reaction combined with the momentum-dispersion matching technique. The present method was verified in an experiment at the RIKEN RI Beam Factory, in which a degree of alignment of 8% was achieved for the spin of a rare isotope Al-32. The figure of merit for the present method was found to be greater than that of the conventional method by a factor of more than 50., Comment: 18 pages, 5 figures

Published
2012
Full Text
View/download PDF

3. Production of spin-aligned RI beam via two-step fragmentation with dispersion matching

Author

Nori Aoi, J. M. Daugas, K. Suzuki, H. Takeda, Hiroshi Watanabe, H. Hayashi, Takeshi Furukawa, Masato Tsuchiya, D. L. Balabanski, G. Georgiev, Akihiro Yoshimi, Y. Ishii, Yuichi Ichikawa, Mustafa Rajabali, Tsuyoshi Inoue, N. Inabe, T. Kubo, Daisuke Kameda, Koichiro Asahi, N. Fukuda, Masamichi Ishihara, Tsuyoshi Ohnishi, H. Iijima, Hideki Ueno, R. Chevrier, Tsubasa Nanao, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, History, Matching (graph theory), 010308 nuclear & particles physics, business.industry, Two step, 21.10.Hw Spin, parity, and isobaric spin 27.40.+z 39(less-than-or-equal-to)A(less-than-or-equal-to)58 27.30.+t 20(less-than-or-equal-to)A(less-than-or-equal-to)38 21.60.-n Nuclear structure models and methods 25.70.Mn Projectile, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Optics, Fragmentation (mass spectrometry), 0103 physical sciences, Dispersion (optics), Physics::Accelerator Physics, 010306 general physics, business, Focus (optics), Nuclear Experiment, Beam (structure), Spin-½
Abstract

International audience; To produce a radioactive-isotope (RI) beam with high spin alignment, we have developed a novel method, the two-step projectile-fragmentation (PF) method, that employs momentum-dispersion matching. An on-line experiment to produce 32Al from 48Ca via 33Al was performed at RIKEN RI Beam Factory. In the experiment, we succeeded in producing approximately 8% spin alignment in an RI beam of 32Al. In this paper, we focus on evaluating the magnitude of spin alignment realized in one-nucleon removal from 33Al

Published
2012
Full Text
View/download PDF

4. Search for an isomeric state in $^{19}$C

Author

Zs. Fülöp, Yasuhiro Togano, Z. Elekes, R. Kanungo, Ákos Horváth, H. Iwasaki, E. Takeshita, Eiji Ideguchi, Atsumasa Yoshida, Koichi Yoshida, Yuichi Ichikawa, J. Gibelin, Hidetada Baba, Satoshi Takeuchi, Yoshitaka Yamaguchi, Masahiro Notani, Zs. Dombrádi, Yosuke Kondo, Isao Tanihata, Susumu Shimoura, S. Kawai, Yoshiyuki Yanagisawa, A. Ozawa, C. Wu, Naohito Iwasa, Tohru Motobayashi, Hiroyoshi Sakurai, Tsuyoshi Ohnishi, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Nuclear and High Energy Physics, 1H (19C, Nuclear Theory, no isomeric state, Nuclear isomer, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 17B deduced, Elab=53 MeV/nucleon, 17B′), 17C′), 0103 physical sciences, 19C′), Iγ, 19C, medicine, Physics::Atomic and Molecular Clusters, (17B, (17C, Physics::Chemical Physics, 010306 general physics, Spin (physics), Nuclear Experiment, Physics, prompt and delayed Eγ, 010308 nuclear & particles physics, 19C deduced, State (functional analysis), Isomeric shift, medicine.anatomical_structure, measured, 23.20.Lv, 21.10.Hw, 21.10.Pc, 21.60.Cs, Nuclear reactions, Atomic physics, Ground state, Nucleus, transitions, Beam (structure)
Abstract

NESTER; A search for an isomeric state in the neutron-rich nucleus $^{19}$C is reported. The existence of an isomer in the nucleus is predicted by shell model calculations which also predicts the ground-state of the nucleus to be 1/2$^+$. An isomeric transition is however not observed in the present investigation. An estimation of upper limit of isomer ratio in the beam is discussed. Furthermore, the non-observation of an isomer includes the possibility of $^{19}$C having a different ground state spin. The $^{17}$C and $^{17}$B nuclei were also investigated for delayed gamma transitions but do not exhibit any isomeric transition.

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results