Search

Your search keyword '"H. Akikawa"' showing total 11 results
Start Over Author "H. Akikawa" Journal nuclear physics a
11 results on '"H. Akikawa"'

1. Σ+p elastic scattering cross sections in the region of 350⩽PΣ+⩽750 MeV/c with a scintillating fiber active target

Author

K. S. Sim, J. M. Lee, Masaharu Ieiri, A. M. Gorin, T. Hayakawa, K. Imai, H. Funahashi, H. Kanda, Yongsun Kim, M. Hanabata, Kazunuki Yamamoto, M. S. Chung, K. Nakai, T. Tabaru, S. V. Golovkin, Akira Masaike, Y. Goto, K. Ozawa, Tsuneo Fukuda, A. Sato, Masaya Ishino, J. Arvieux, Fujio Takeutchi, A. K. Ichikawa, Hirohiko Sato, H. En'yo, P. Tlustý, H. Akikawa, H. Torii, J. K. Ahn, S. Yokkaichi, E.N. Kozarenko, Kazuma Nakazawa, Minoru Yoshida, B. Bassalleck, I. E. Kreslo, Y. Kondo, and Satoshi Mihara

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Range (particle radiation), Hydrogen, Scintillating fiber, 010308 nuclear & particles physics, Scattering, Hyperon, chemistry.chemical_element, 7. Clean energy, 01 natural sciences, Nuclear physics, Momentum, chemistry, Beamline, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract

A hyperon–nucleon scattering experiment, KEK-PS E289, was carried out at the K2 beam line in KEK. We adopted a scintillating fiber active target as a hydrogen target for hyperon production and subsequent hyperon–nucleon scattering. We collected more data than in a previous experiment, KEK-PS E251. In this paper, the differential cross sections for Σ+p elastic scattering in the incident momentum range from 350 to 750 MeV/c are presented and compared with theoretical predictions from the Nijmegen group (Nijmegen Soft Core 97) and the Kyoto–Niigata group (RGM-FSS and fss2).

Published
2005
Full Text
View/download PDF

2. Observation of hypernuclear fine structure in 16ΛO

Author

David E. Alburger, J. Franz, K. Tanida, Osamu Hashimoto, Toshinobu Miyoshi, Shigeo Minami, S. Ajimura, Yoichi Sato, Morgan May, S.N. Nakamura, K. Mizunuma, Hitoshi Tamura, H. Akikawa, Hirotaka Takahashi, R. J. Sutter, P. Pile, Mifuyu Ukai, Tomofumi Nagae, K. Imai, Y. Miura, G. B. Franklin, L. Yuan, Adam Rusek, Kazuma Nakazawa, T. Hayakawa, Y. Okayasu, B. P. Quinn, A. Banu, R. E. Chrien, Hideaki Hotchi, L. G. Tang, and T. Kishimoto

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Excited state, Yield ratio, Tensor, Atomic physics, Ground state, Spin (physics), Semiconductor detector
Abstract

We observed two γ-ray transitions of 16ΛO in the 16O( K − , π − γ ) reaction using a germanium detector array, Hyperball. The γ rays are assigned as the M1 transitions from the 6 MeV excited state ( 1 − ) to the ground state doublet ( 1 − , 0 − ). The energies of the γ rays are 6534.1 ± 1.5 keV and 6560.2 ± 1.3 keV , and the energy spacing is 26.1 ± 2.0 keV , which corresponds to the ground state doublet spacing. From their yield ratio of 0.65 ± 0.11 ( N ( 6534 ) / N ( 6560 ) ) , the spin order of the ground state doublet is determined. This result gives a small value for the ΛN tensor force strength.

Published
2005
Full Text
View/download PDF

3. High-resolution γ-ray spectroscopy of hyperfragments produced by stopped reactions

Author

S. Ota, K. Tanida, Hirokazu Tamura, M. Togawa, Y. Fukao, Seiji Terashima, M. Niiyama, Emiko Hiyama, K. Mizunuma, K. Miwa, H. Takahashi, Mifuyu Ukai, Y. Miura, Pranab Kumar Saha, K. Imai, H. Hotchi, Toshiyuki Takahashi, H. Akikawa, and Satoshi Nakamura

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Nuclear magnetic resonance, Isotopes of lithium, Analytical chemistry, Carbon-12, Gamma spectroscopy, Isotopes of boron, Stopping power, Spectroscopy, Lambda baryon
Abstract

We performed an experiment to measure γ rays of hyperfragments produced by stopped K − reactions on light ( A ⩽ 12 ) targets (KEK-PS E509). We clearly observed an E2 transition ( 5 / 2 + → 1 / 2 + ) in 7ΛLi with 10B, 11B and 12C targets and obtained the γ-ray intensity to be ( 7.5 ± 1.6 ) × 10 −4 per stopped K − for 10B target. In addition, a candidate for a new hypernuclear γ ray was observed. These results show that this method is quite suitable for the systematic study of hypernuclei.

Published
2005
Full Text
View/download PDF

4. γ-ray spectroscopy in Λ hypernuclei

Author

H. Tamura, S. Ajimura, H. Akikawa, D.E. Alburger, K. Aoki, A. Banu, R.E. Chrien, G.B. Franklin, J. Franz, Y. Fujii, Y. Fukao, T. Fukuda, O. Hashimoto, T. Hayakawa, E. Hiyama, H. Hotchi, K. Imai, W. Imoto, Y. Kakiguchi, M. Kameoka, T. Kishimoto, A. Krutenkova, T. Maruta, A. Matsumura, M. May, S. Minami, Y. Miura, K. Miwa, T. Miyoshi, K. Mizunuma, T. Nagae, S.N. Nakamura, K. Nakazawa, M. Niiyama, H. Nomura, H. Noumi, Y. Okayasu, S. Ota, T. Ohtaki, H. Outa, P. Pile, B.P. Quinn, A. Rusek, P.K. Saha, Y. Sato, T. Saitoh, M. Sekimoto, R. Sutter, H. Takahashi, T. Takahashi, L. Tang, K. Tanida, S. Terashima, M. Togawa, A. Toyoda, M. Ukai, H. Yamauchi, L. Yuan, and S.H. Zhou

Subjects
Physics, Nuclear and High Energy Physics, Gamma ray, Gamma spectroscopy, Tensor, Atomic physics, Lambda, Spectroscopy, Beam (structure)
Abstract

The present status of hypernuclear gamma-ray spectroscopy with Hyperball is summarized. We observed two gamma transitions of 16-Lambda-O(1- -> 1-,0-) and obtained the strength of the Lambda-N tensor force. In 10B(K-,pi- gamma) data, we did not observe the spin-flip M1 transition of 10-Lambda-B(2- -> 1-), but gamma rays from hyperfragments such as 7-Lambda-Li(7/2+ -> 5/2+) and 9-Lambda-Be(3/2+ ->1/2+) were observed. In 11B(pi+,K+ gamma) data, we observed six gamma transitions of 11_Lambda-B. We also attempted an inclusive gamma-ray measurement with stopped K- beam.

Published
2005
Full Text
View/download PDF

6. Observation of double-hypernuclei and Λ-Λ interaction

Author

H. Takahashi, J.K. Ahn, H. Akikawa, S. Aoki, K. Arai, S.Y. Bahk, K.M. Baik, B. Bassalleck, J.H. Chung, M.S. Chung, D.H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, Y.H. Iwata, Y.S. Iwata, H. Kanda, M. Kaneko, T. Kawai, M. Kawasaki, C.O. Kim, J.Y. Kim, S.H. Kim, Y. Kondo, T. Kouketsu, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, M. Okuda, K. Oyama, B.D. Park, H.M. Park, I.G. Park, J. Parker, Y.S. Ra, J.T. Rhee, A. Rusek, H. Shibuya, K.S. Sim, P.K. Saha, D. Seki, M. Sekimoto, J.S. Song, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, J. Tojo, H. Torii, S. Torikai, D.N. Tovee, N. Ushida, T. Wint, K. Yamamoto, N. Yasuda, J.T. Yang, C.J. Yoon, C.S. Yoon, M. Yosoi, T. Yoshida, and L. Zhu

Subjects
Physics, Baryon, Nuclear physics, Nuclear and High Energy Physics, Particle decay, Branching fraction, Hadron, Hyperon, Elementary particle, Fermion, Lambda baryon
Abstract

A hybrid-emulsion experiment has been carried out at KEK-PS to study S = −2 nuclei. With the analysis of about 35% of total emulsion, we have successfully found three events of sequential weak decay of a double-hypernucleus. The results of these E373 events are summarized together with those of past experiments. The first experimental study of the branching ratios of weak decay modes of double-hypernuclei has been performed.

Published
2003
Full Text
View/download PDF

7. Structure of Λ13C hypernucleus studied by the (K−, π−γ) reaction

Author

E. Saji, R. A. Schumacher, R. E. Chrien, Tomokazu Fukuda, H. Akikawa, K. Tanida, Y.S. Miyake, J. Nakano, Tadafumi Kishimoto, J. Franz, L. Yuan, L. G. Tang, G. B. Franklin, Adam Rusek, K. Matsuoka, P. Khaustov, R. Sawafta, P. Pile, Morgan May, S. Ajimura, H. Kohri, L. Gan, Hiroyuki Tamura, Atsushi Sakaguchi, K. Morikubo, R. J. Sutter, Yuji Shimizu, H. Hayakawa, S. Minami, B. P. Quinn, P. Eugenio, Haruhiko Outa, Hiroyuki Noumi, M. Sumihama, T. Tamagawa, and K. Paschke

Subjects
Physics, Nuclear and High Energy Physics, Structure (category theory), Particle, State (functional analysis), Atomic physics, Nuclear Experiment, Nucleon, Spectroscopy, Hypernucleus, Excitation
Abstract

The BNL-AGS/E929 experiment was carried out to study energy levels of the Λ 13 C hypernucleus by a gamma-ray spectroscopy. Energy splitting of the spin-orbit doublets, 1 2 − and 3 2 − states, was estimated precisely. The excitation energy of the 1st 3 2 + state was also measured. We discuss the symmetric and the anti-symmetric spin-orbit interactions between a Λ particle and a nucleon from the measurement.

Published
2003
Full Text
View/download PDF

8. Study of double-strangeness nuclei with hybrid-emulsion method (KEK-PS E373)

Author

K. Oyama, T. Kouketsu, B. Bassalleck, J. Parker, I. G. Park, C. O. Kim, H. Takahashi, Tomoko Yoshida, J. S. Song, N. Ushida, S. Ogawa, K. Hoshino, H. Akikawa, Toshiyuki Takahashi, K. Arai, H. Kanda, J.T. Yang, L. H. Zhu, J. K. Ahn, Michiko Sekimoto, Shigeki Aoki, Y. S. Iwata, Junji Tojo, Y. Nagase, S. J. Kim, Y. H. Iwata, J. Y. Kim, J. H. Chung, H. M. Park, H. Torii, Y. L. Lee, H. Okabe, J. W C McNabb, Atsushi Ichikawa, N. Yasuda, M. Mitsuhara, A. Rusek, Kwang Souk Sim, Y. S. Ra, T. Kawai, K. Imai, H. Tanaka, Saewoong Bahk, K. M. Baik, Fujio Takeutchi, M. Kaneko, Kazuhiro Yamamoto, Seok Kim, P. K. Saha, C.J. Yoon, D. Seki, C. S. Yoon, H. Shibuya, Y. Kondo, K. Tanida, J. T. Rhee, Masaharu Ieiri, M. S. Chung, S. Torikai, M. Yosoi, Hiroyuki Noumi, Kazuma Nakazawa, and C. Nagoshi

Subjects
Physics, Nuclear and High Energy Physics, Optics, Scintillating fiber, Spectrometer, business.industry, Track (disk drive), Detector, Emulsion, Nuclear emulsion, Strangeness, business
Abstract

An experiment to search for double-strangeness nuclei in nuclear emulsion is now being carried on as KEK-PS E373. Preliminary results of the data analysis for the K + spectrometer and the scintillating fiber detectors are presented. Status of the automatic track finding method for the emulsion is reported.

Published
2001
Full Text
View/download PDF

9. High-resolution γ-ray spectroscopy of 7ΛLi

Author

T. Saito, Y. Kakiguchi, J. Sasao, Y. D. Kim, S. H. Zhou, Tomofumi Nagae, H. Hotchi, L. H. Zhu, H. H. Xia, S. Satoh, T. Takahashi, T. Murakami, H. C. Bhang, K. Imai, Toshinobu Miyoshi, H. Akikawa, Osamu Hashimoto, Haruhiko Outa, K. Tanida, Yoichi Sato, Hiroyuki Noumi, Kyoichiro Ozawa, J. H. Kim, Y. Fujii, L. G. Tang, R. Sawafta, D. Abe, T. Endo, M. Sekimoto, K. Araki, Hitoshi Tamura, and Tsuneo Fukuda

Subjects
Physics, Nuclear and High Energy Physics, Analytical chemistry, High resolution, Instrumental chemistry, Spectroscopy
Published
2001
Full Text
View/download PDF

10. γ-ray spectroscopy of 9ΛBe

Author

Xiaofeng Zhu, L. Gang, P. Khaustov, S. Ajimura, H. Schmitt, H. Akikawa, P. Eugenio, Morgan May, Hitoshi Tamura, L. Yuan, Adam Rusek, R. E. Chrien, K. Imai, L. G. Tang, R. Sawafta, J. Franz, L. H. Zhu, J. Sasao, B. P. Quinn, P. Pile, K. Tanida, and G. B. Franklin

Subjects
Physics, Nuclear and High Energy Physics, Thesaurus (information retrieval), Information retrieval, Instrumental chemistry, Spectroscopy
Published
2001
Full Text
View/download PDF

11. Study of double-strangeness nuclei with hybrid-emulsion method (KEK-PS E373)

Author

A. Ichikawa, J.K. Ahn, Y. Akaishi, H. Akikawa, S. Aoki, S.Y. Bahk, K.M. Baik, M.S. Chung, T. Fukuda, K. Hoshino, M. Ieiri, K. Imai, Y. Iwata, H. Kanda, M. Kaneko, T. Kawai, C.O. Kim, J.Y. Kim, S.J. Kim, Y. Kondo, T. Motoba, C. Nagoshi, K. Nakazawa, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, H.M. Park, I.G. Park, Y.S. Ra, J.T. Rhee, M. Sekimoto, H. Shibuya, K.S. Sim, J.S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, J. Tojo, H. Torii, S. Torikai, N. Ushida, K. Yamamoto, Y. Yamamoto, J.T. Yang, N. Yasuda, C.J. Yoon, T. Yoshida, and Y. Yosoi

Subjects
Nuclear and High Energy Physics
Published
2000
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results