論文 - 松田 洋平
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Measurement of the Radiative-Decay Probability of the Hoyle State
Kosuke Sakanashi, Takahiro Kawabata, Tatsuya Furuno, Atsushi Tamii, Rei Niina, Shintaro Okamoto, Masatoshi Ito, Satoshi Adachi, Hidetoshi Akimune, Yohei Matsuda, Shigeru Kubono, Soichiro Aogaki, Pär-Anders Soöderstroöm, Madgearu Teodora, Haridas Pai, Mihai Cuciuc, Dmitry Tescov, Ruxandra Borcea, Andrei Turturica, Constantin Mihai, Catalin Neacse
EPJ Web of Conferences 306 01047 - 01047 2024年10月
出版者・発行元：EDP Sciences
The radiative-decay probability of the Hoyle state is actually controversial because new data which contradicts the currently adopted value has been recently reported. In this work, we performed the new reliable measurement of the radiative-decay probability of the Hoyle state. We successfully obtained 40 triplecoincidence events of scattered α particles, recoil <sup>12</sup>C, and emitted γ rays for the first time. Further analysis will determine the radiative-decay probability, and puzzle over the radiative-decay probability.
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Effect of ground-state deformation on the isoscalar giant monopole resonance and the first observation of overtones of the isoscalar giant quadrupole resonance in rare-Earth Nd isotopes 査読あり 国際共著 国際誌
M. Abdullah, S. Bagchi, M.N. Harakeh, H. Akimune, D. Das, T. Doi, L.M. Donaldson, Y. Fujikawa, M. Fujiwara, T. Furuno, U. Garg, Y.K. Gupta, K.B. Howard, Y. Hijikata, K. Inaba, S. Ishida, M. Itoh, N. Kalantar-Nayestanaki, D. Kar, T. Kawabata, S. Kawashima, K. Khokhar, K. Kitamura, N. Kobayashi, Y. Matsuda, A. Nakagawa, S. Nakamura, K. Nosaka, S. Okamoto, S. Ota, S. Pal, R. Pramanik, S. Roy, S. Weyhmiller, Z. Yang, J.C. Zamora
Physics Letters B 138852 - 138852 2024年7月
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P. J. Li, D. Beaumel, J. Lee, M. Assié, S. Chen, S. Franchoo, J. Gibelin, F. Hammache, T. Harada, Y. Kanada-En’yo, Y. Kubota, S. Leblond, P. F. Liang, T. Lokotko, M. Lyu, F. M. Marqués, Y. Matsuda, K. Ogata, H. Otsu, E. Rindel, L. Stuhl, D. Suzuki, Y. Togano, T. Tomai, X. X. Xu, K. Yoshida, J. Zenihiro, N. L. Achouri, T. Aumann, H. Baba, G. Cardella, S. Ceruti, A. I. Stefanescu, A. Corsi, A. Frotscher, J. Gao, A. Gillibert, K. Inaba, T. Isobe, T. Kawabata, N. Kitamura, T. Kobayashi, Y. Kondo, A. Kurihara, H. N. Liu, H. Miki, T. Nakamura, A. Obertelli, N. A. Orr, V. Panin, M. Sasano, T. Shimada, Y. L. Sun, J. Tanaka, L. Trache, D. Tudor, T. Uesaka, H. Wang, H. Yamada, Z. H. Yang, M. Yasuda
Physical Review Letters 131 ( 21 ) 212501 2023年11月
出版者・発行元：American Physical Society (APS)
DOI： 10.1103/physrevlett.131.212501
その他リンク： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.131.212501/fulltext
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Development and fabrication of a thick Ti-3H target for the 3H(t, 3He)3n experiment at intermediate energies 査読あり 国際誌
K. Miki, Y. Utsuki, M. Hara, Y. Hatano, N. Imai, M. Inoue, M. Itoh, K. Kameya, S. Kitayama, Y. Maruta, Y. Matsuda, Y. Saito, D. Sakai, T. Uesaka, H. Umetsu, R. Urayama, J. Wang, K. Kamada, Y. Shoji, A. Yoshikawa
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1056 2023年7月
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Chihiro Iwamoto, Shinsuke Ota, Reiko Kojima, Hiroshi Tokieda, Seiya Hayakawa, Yutaka Mizoi, Taku Gunji, Hidetoshi Yamaguchi, Nobuaki Imai, Masanori Dozono, Ryo Nakajima, Olga Beliuskina, Shin’ichiro Michimasa, Rin Yokoyama, Keita Kawata, Daisuke Suzuki, Tadaaki Isobe, Juzo Zenihiro, Yohei Matsuda, Jun Okamoto, Tetsuya Murakami, Eiichi Takada
Progress of Theoretical and Experimental Physics 2023 ( 8 ) 2023年7月
出版者・発行元：Oxford University Press (OUP)
Abstract
A prototype Dual Gain Multilayer Thick Gas Electron Multiplier (DG-M-THGEM) with an active area of 10 cm × 10 cm was manufactured aiming at the production of a large-volume active-target time projection chamber which can work under the condition of high-intensity heavy-ion beam injections. The DG-M-THGEM has an alternating structure of electrodes and insulators. Effective gas gains of two regions, which are called beam and recoil regions, are separately controlled. Performance of the prototype DG-M-THGEM in hydrogen gas at a pressure of 40 kPa was evaluated. Irradiating a 132Xe beam, an effective gas gain lower than 100 with a charge resolution of 3% was achieved in the beam region while an effective gas gain of 2000 was maintained in the recoil region. Position distributions of measured charges along the beam axis were investigated in order to evaluate gain uniformity in the high-intensity beam injection. The gain shift was estimated by simulations considering space charges in the drift region. The gain shift was suppressed within 3% even at the beam intensity of 2.5 × 106 particles per second.DOI： 10.1093/ptep/ptad095
その他リンク： https://academic.oup.com/ptep/article-pdf/2023/8/083H01/51122122/ptad095.pdf
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Nitrogen gas scintillation counter for high-intensity heavy ion beams with negligible radiation damage 査読あり 国際誌
F. Saito, Y. Matsuda, S. Umemoto, N. Yamasaki, M. Itoh, J. Zenihiro, M. Dozono, Y. Hijikata, S. Terashima, T. Harada, H. Sakaguchi, S. Ota, A. Kohda, Y. Maeda, T. Kawabata
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 540 262 - 264 2023年7月
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Multiple Mechanisms in Proton-Induced Nucleon Removal at ∼100 MeV/Nucleon 査読あり 国際共著 国際誌
T. Pohl, Y. L. Sun, A. Obertelli, J. Lee, M. Gómez-Ramos, K. Ogata, K. Yoshida, B. S. Cai, C. X. Yuan, B. A. Brown, H. Baba, D. Beaumel, A. Corsi, J. Gao, J. Gibelin, A. Gillibert, K. I. Hahn, T. Isobe, D. Kim, Y. Kondo, T. Kobayashi, Y. Kubota, P. Li, P. Liang, H. N. Liu, J. Liu, T. Lokotko, F. M. Marqués, Y. Matsuda, T. Motobayashi, T. Nakamura, N. A. Orr, H. Otsu, V. Panin, S. Y. Park, S. Sakaguchi, M. Sasano, H. Sato, H. Sakurai, Y. Shimizu, A. I. Stefanescu, L. Stuhl, D. Suzuki, Y. Togano, D. Tudor, T. Uesaka, H. Wang, X. Xu, Z. H. Yang, K. Yoneda, J. Zenihiro
Physical Review Letters 130 ( 17 ) 2023年4月
出版者・発行元：American Physical Society (APS)
DOI： 10.1103/physrevlett.130.172501
その他リンク： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.172501/fulltext
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Tatsuya Furuno, Takanobu Doi, Kanako Himi, Takahiro Kawabata, Satoshi Adachi, Hidetoshi Akimune, Shiyo Enyo, Yuki Fujikawa, Yuto Hijikata, Kento Inaba, Masatoshi Itoh, Shigeru Kubono, Yohei Matsuda, Isao Murata, Motoki Murata, Shintaro Okamoto, Kosuke Sakanashi, Shingo Tamaki
EPJ Web of Conferences 260 11010 - 11010 2022年
出版者・発行元：EDP Sciences
The reaction rate of the triple-alpha reaction can be enhanced in hot and dense environments due to the deexcitation of the Hoyle state in <sup>12</sup>C by neutrons. The cross section of the deexcitation should be determined for the enhanced reaction rate. We plan to obtain the cross section by measuring the inverse reaction using a neutron beam around 10 MeV and an active target system. In the present paper, we report a proof-of-principle experiment using a neutron beam at 14 MeV. The obtained cross section is consistent with a previous result, demonstrating the validity of our method.
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自動サイクロトロン共鳴加速法を用いた陽子加速実現に向けてのテストベンチ開発
原 隆文, 福田 光宏, 神田 浩樹, 依田 哲彦, 安田 祐介, 武田 佳次朗, 篠塚 勉, 伊藤 正俊, 倉島 俊, 宮脇 信正, 涌井 崇志, 中尾 政夫, 松田 洋平
Proceedings of the 18th Annual Meeting of Particle Accelerator Society of Japan 653 - 655 2021年10月
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Candidates for the 5α condensed state in 20Ne 査読あり 国際誌
S. Adachi, Y. Fujikawa, T. Kawabata, H. Akimune, T. Doi, T. Furuno, T. Harada, K. Inaba, S. Ishida, M. Itoh, C. Iwamoto, N. Kobayashi, Y. Maeda, Y. Matsuda, M. Murata, S. Okamoto, A. Sakaue, R. Sekiya, A. Tamii, M. Tsumura
Physics Letters B 819 136411 - 136411 2021年5月
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First experimental determination of the radiative-decay probability of the 31− state in 12C for estimating the triple alpha reaction rate in high temperature environments 査読あり 国際共著 国際誌
M. Tsumura, T. Kawabata, Y. Takahashi, S. Adachi, H. Akimune, S. Ashikaga, T. Baba, Y. Fujikawa, H. Fujimura, H. Fujioka, T. Furuno, T. Hashimoto, T. Harada, M. Ichikawa, K. Inaba, Y. Ishii, N. Itagaki, M. Itoh, C. Iwamoto, N. Kobayashi, A. Koshikawa, S. Kubono, Y. Maeda, Y. Matsuda, S. Matsumoto, K. Miki, T. Morimoto, M. Murata, T. Nanamura, I. Ou, S. Sakaguchi, A. Sakaue, M. Sferrazza, K.N. Suzuki, T. Takeda, A. Tamii, K. Watanabe, Y.N. Watanabe, H.P. Yoshida, J. Zenihiro
Physics Letters B 817 136283 - 136283 2021年4月
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Formation of α clusters in dilute neutron-rich matter 査読あり 国際共著 国際誌
Junki Tanaka, Zaihong Yang, Stefan Typel, Satoshi Adachi, Shiwei Bai, Patrik van Beek, Didier Beaumel, Yuki Fujikawa, Jiaxing Han, Sebastian Heil, Siwei Huang, Azusa Inoue, Ying Jiang, Marco Knösel, Nobuyuki Kobayashi, Yuki Kubota, Wei Liu, Jianling Lou, Yukie Maeda, Yohei Matsuda, Kenjiro Miki, Shoken Nakamura, Kazuyuki Ogata, Valerii Panin, Heiko Scheit, Fabia Schindler, Philipp Schrock, Dmytro Symochko, Atsushi Tamii, Tomohiro Uesaka, Vadim Wagner, Kazuki Yoshida, Juzo Zenihiro, Thomas Aumann
Science 371 ( 6526 ) 260 - 264 2021年1月
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Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90 査読あり 国際共著 国際誌
K.B. Howard, U. Garg, M. Itoh, H. Akimune, M. Fujiwara, T. Furuno, Y.K. Gupta, M.N. Harakeh, K. Inaba, Y. Ishibashi, K. Karasudani, T. Kawabata, A. Kohda, Y. Matsuda, M. Murata, S. Nakamura, J. Okamoto, S. Ota, J. Piekarewicz, A. Sakaue, M. Şenyiğit, M. Tsumura, Y. Yang
Physics Letters B 807 135608 - 135608 2020年8月
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Novel multi-layer plastic-scintillator-based solid active proton target for inverse-kinematics experiments 査読あり 国際共著 国際誌
D.T.Tran, S. Terashima, H.J. Ong, K. Hirakawa, Y. Matsuda, N. Aoi, M.N. Harakeh, M. Itoh, T. Kawabata, A. Kohda, S.Y. Matsumoto, T. Nishi, J. Okamoto, I. Tanihata
Nuclear Instruments and Methods in Physics Research Section A 959 2020年4月
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Search for α-Condensed State in 20Ne 査読あり 国際誌
Yuki Fujikawa, Satoshi Adachi, Takahiro Kawabata, Miho Tsumura, Akane Sakaue, Kento Inaba, Takanobu Doi, Ryohei Fujii, Haruki Furuta, Takeshi Harada, Shintaro Okamoto, Ryohei Sekiya, Atsushi Tamii, Nobuyuki Kobayashi, Tatsuya Furuno, Masatoshi Itoh, Yohei Matsuda, Shunya Ishida, Yukie Maeda, Kotaro Nonaka, Chihiro Iwamoto, Hidetoshi Akimune
Proceedings of the 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15) 2020年3月
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Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility 査読あり 国際共著 国際誌
K. B. Howard, U. Garg, M. Itoh, H. Akimune, S. Bagchi, T. Doi, Y. Fujikawa, M. Fujiwara, T. Furuno, M. N. Harakeh, Y. Hijikata, K. Inaba, S. Ishida, N. Kalantar-Nayestanaki, T. Kawabata, S. Kawashima, K. Kitamura, N. Kobayashi, Y. Matsuda, A. Nakagawa, S. Nakamura, K. Nosaka, S. Okamoto, S. Ota, S. Weyhmiller, Z. Yang
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 801 2020年2月
Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium isotopes Ca have suggested that K , the asymmetry term in the nuclear incompressibility, has a positive value. A value of K >0 is entirely incompatible with present theoretical frameworks and, if correct, would have far-reaching implications on our understanding of myriad nuclear and astrophysical phenomena. This paper presents results of an independent ISGMR measurement with the Ca(α,α ) reaction at E =386 MeV. These results conclusively discount the possibility of a positive value for K , and are consistent with the previously-obtained values for this quantity. 40,44,48 40,42,44,48 ′ τ τ α τ
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Performance test of the MAIKo active target 査読あり 国際共著 国際誌
T. Furuno, T. Kawabata, H. J. Ong, S. Adachi, Y. Ayyad, T. Baba, Y. Fujikawa, T. Hashimoto, K. Inaba, Y. Ishii, S. Kabuki, H. Kubo, Y. Matsuda, Y. Matsuoka, T. Mizumoto, T. Morimoto, M. Murata, T. Sawano, T. Suzuki, A. Takada, J. Tanaka, I. Tanihata, T. Tanimori, D. T. Tran, M. Tsumura, H. D. Watanabe
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 908 215 - 224 2018年11月
共著
© 2018 Elsevier B.V. A new active target named MAIKo (Mu-PIC based Active target for Inverse Kinematics∘) has been developed at Kyoto University and Research Center for Nuclear Physics (RCNP), Osaka University. MAIKo is suited for missing-mass spectroscopy of unstable nuclei at forward scattering angles in inverse kinematics. MAIKo consists of a time projection chamber (TPC), which incorporates a micro-pixel chamber (μ-PIC) as the electron multiplication and collection system. In MAIKo, the medium gas also plays the role of a reaction target, thus allowing detection of low-energy recoil particles with high position resolution. The MAIKo TPC was commissioned with He(93%)+iso-C4H10(7%) and He(93%)+CO2(7%) mixture gasses at 430 hPa. The gas gain and the angular resolution of MAIKo were evaluated with an alpha source and a 4He beam at 56 MeV. The TPC was stably operated up to 1000-kcps beam intensity. A tracking algorithm using the Hough transform method has been developed to analyze scattering events. An angular resolution of 1.3°was achieved for scattered 4He particles.
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Extraction of the Landau-Migdal Parameter from the Gamow-Teller Giant Resonance in Sn 132 査読あり 国際共著 国際誌
J. Yasuda, M. Sasano, R. G.T. Zegers, H. Baba, D. Bazin, W. Chao, M. Dozono, N. Fukuda, N. Inabe, T. Isobe, G. Jhang, D. Kameda, M. Kaneko, K. Kisamori, M. Kobayashi, N. Kobayashi, T. Kobayashi, S. Koyama, Y. Kondo, A. J. Krasznahorkay, T. Kubo, Y. Kubota, M. Kurata-Nishimura, C. S. Lee, J. W. Lee, Y. Matsuda, E. Milman, S. Michimasa, T. Motobayashi, D. Muecher, T. Murakami, T. Nakamura, N. Nakatsuka, S. Ota, H. Otsu, V. Panin, W. Powell, S. Reichert, S. Sakaguchi, H. Sakai, M. Sako, H. Sato, Y. Shimizu, M. Shikata, S. Shimoura, L. Stuhl, T. Sumikama, H. Suzuki, S. Tangwancharoen, M. Takaki, H. Takeda, T. Tako, Y. Togano, H. Tokieda, J. Tsubota, T. Uesaka, T. Wakasa, K. Yako, K. Yoneda, J. Zenihiro
Physical Review Letters 121 ( 13 ) 132501-1 - 132501-6 2018年9月
共著
© 2018 American Physical Society. The key parameter to discuss the possibility of the pion condensation in nuclear matter, i.e., the so-called Landau-Migdal parameter g′, was extracted by measuring the double-differential cross sections for the (p,n) reaction at 216 MeV/u on a neutron-rich doubly magic unstable nucleus, Sn132 with the quality comparable to data taken with stable nuclei. The extracted strengths for Gamow-Teller (GT) transitions from Sn132 leading to Sb132 exhibit the GT giant resonance (GTR) at the excitation energy of 16.3±0.4(stat)±0.4(syst) MeV with the width of Γ=4.7±0.8 MeV. The integrated GT strength up to Ex=25 MeV is SGT-=53±5(stat)-10+11(syst), corresponding to 56% of Ikeda's sum rule of 3(N-Z)=96. The present result accurately constrains the Landau-Migdal parameter as g′=0.68±0.07, thanks to the high sensitivity of the GTR energy to g′. In combination with previous studies on the GTR for Zr90 and Pb208, the result of this work shows the constancy of this parameter in the nuclear chart region with (N-Z)/A=0.11 to 0.24 and A=90 to 208.
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Isoscalar giant monopole, dipole, and quadrupole resonances in Zr 90,92 and Mo 92 査読あり 国際共著 国際誌
Y. K. Gupta, K. B. Howard, U. Garg, J. T. Matta, M. Şenyiǧit, M. Itoh, S. Ando, T. Aoki, A. Uchiyama, S. Adachi, M. Fujiwara, C. Iwamoto, A. Tamii, H. Akimune, C. Kadono, Y. Matsuda, T. Nakahara, T. Furuno, T. Kawabata, M. Tsumura, M. N. Harakeh, N. Kalantar-Nayestanaki
Physical Review C 97 ( 6 ) 064323 2018年6月
共著
© 2018 American Physical Society. The isoscalar giant monopole, dipole, and quadrupole strength distributions have been deduced in Zr90,92 and Mo92 from "background-free" spectra of inelastic α-particle scattering at a beam energy of 385 MeV at extremely forward angles, including 0°. These strength distributions were extracted by a multipole-decomposition analysis based on the expected angular distributions of the respective multipoles. All these strength distributions for the three nuclei practically coincide with each other, affirming that giant resonances, being collective phenomena, are not influenced by nuclear shell structure near A∼90, contrary to the claim in a recent measurement.
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Proton elastic scattering at 200 A MeV and high momentum transfers of 1.7_2.7 fm−1 as a probe of the nuclear matter density of 6He 査読あり 国際共著 国際誌
S. Chebotaryov, S. Sakaguchi, T. Uesaka, T. Akieda, Y. Ando, M. Assie, D. Beaumel, N. Chiga, M. Dozono, A. Galindo-Uribarri, B. Heffron, A. Hirayama, T. Isobe, K. Kaki, S. Kawase, W. Kim, T. Kobayashi, H. Kon, Y. Kondo, Y. Kubota, S. Leblond, H. Lee, T. Lokotko, Y. Maeda, Y. Matsuda, K. Miki, E. Milman, T. Motobayashi, T. Mukai, S. Nakai, T. Nakamura, A. Ni, T. Noro, S. Ota, H. Otsu, T. Ozaki, V. Panin, S. Park, A. Saito, H. Sakai, M. Sasano, H. Sato, K. Sekiguchi, Y. Shimizu, I. Stefan, L. Stuhl, M. Takaki, K. Taniue, K. Tateishi, S. Terashima, Y. Togano, T. Tomai, Y. Wada, T. Wakasa, T. Wakui, A. Watanabe, H. Yamada, Zh. Yang, M. Yasuda, J. Yasuda, K. Yoneda, J. Zenihiro
Progress of Theoretical and Experimental Physics 2018 ( 5 ) 053D01 2018年5月