2023/02/03 更新

写真b

イイムラ シュン
飯村 俊
IIMURA Shun
*大学が定期的に情報更新している項目(その他は、researchmapの登録情報を転載)
所属*
理学部 物理学科
職名*
助教
学位
博士(理学) ( 2022年3月   大阪大学 )
学内職務経歴*
  • 2022年4月 - 現在 
    理学部   物理学科   助教
 

研究分野

  • 自然科学一般 / 素粒子、原子核、宇宙線、宇宙物理にする実験

受賞

  • 2019年12月  
    RIKEN Scientists' Assembly Steering Committee (RSASC)  The All-RIKEN Workshop 2019, Best Poster Award  Development of gas cell to stop and collect high energy RI beam, and extract radioactive ions with a high efficiency
     
    S. Iimura, A. Takamine, J. Liu, S. Chen, M. Rosenbusch, M. Wada, H. Ishiyama

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論文

  • Study of the N = 32 and N = 34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI 査読有り

    S. Iimura, M. Rosenbusch, A. Takamine, Y. Tsunoda, M. Wada, S. Chen, D. S. Hou, W. Xian, H. Ishiyama, S. Yan, P. Schury, H. Crawford, P. Doornenbal, Y. Hirayama, Y. Ito, S. Kimura, T. Koiwai, T. M. Kojima, H. Koura, J. Lee, J. Liu, S. Michimasa, H. Miyatake, J. Y. Moon, S. Naimi, S. Nishimura, T. Niwase, A. Odahara, T. Otsuka, S. Paschalis, M. Petri, N. Shimizu, T. Sonoda, D. Suzuki, Y. X. Watanabe, K. Wimmer, H. Wollnik

    Physical Review Letters130 ( 1 )   2023年1月5日

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevlett.130.012501

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.012501/fulltext

  • The new MRTOF mass spectrograph following the ZeroDegree spectrometer at RIKEN’s RIBF facility 査読有り

    M. Rosenbusch, M. Wada, S. Chen, A. Takamine, S. Iimura, D. Hou, W. Xian, S. Yan, P. Schury, Y. Hirayama, Y. Ito, H. Ishiyama, S. Kimura, T. Kojima, J. Lee, J. Liu, S. Michimasa, H. Miyatake, J.Y. Moon, M. Mukai, S. Nishimura, S. Naimi, T. Niwase, T. Sonoda, Y.X. Watanabe, H. Wollnik

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   167824 - 167824   2022年11月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.nima.2022.167824

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  • In-gas-cell laser resonance ionization spectroscopy of 200, 201 Pt 査読有り

    Y. Hirayama, M. Mukai, Y. X. Watanabe, P. Schury, H. Nakada, J. Y. Moon, T. Hashimoto, S. Iimura, S. C. Jeong, M. Rosenbusch, M. Oyaizu, T. Niwase, M. Tajima, A. Taniguchi, M. Wada, H. Miyatake

    Physical Review C106 ( 3 )   2022年9月30日

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevc.106.034326

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.106.034326/fulltext

  • Various nuclear structures in Xe 140 studied by β decay of ground and isomeric states in i 140 査読有り

    A. Yagi, A. Odahara, H. Nishibata, R. Lozeva, C. B. Moon, S. Nishimura, K. Yoshida, N. Yoshinaga, C. Watanabe, K. Higashiyama, T. Shimoda, R. Daido, Y. Fang, P. S. Lee, B. Moon, P. Doornenbal, G. Lorusso, P. A. Söderström, T. Sumikama, H. Watanabe, T. Isobe, H. Baba, H. Sakurai, F. Browne, Z. Patel, S. Rice, L. Sinclair, J. Wu, Z. Y. Xu, R. Yokoyama, T. Kubo, N. Inabe, H. Suzuki, N. Fukuda, D. Kameda, H. Takeda, D. S. Ahn, Y. Shimizu, D. Murai, F. L. Bello Garrote, J. M. Daugas, F. Didierjean, E. Ideguchi, S. Iimura, T. Ishigaki, H. S. Jung, T. Komatsubara, Y. K. Kwon, C. S. Lee, S. Morimoto, M. Niikura, I. Nishizuka, K. Tshoo

    Physical Review C105 ( 4 )   2022年4月

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    掲載種別:研究論文(学術雑誌)  

    Structure of the neutron-rich N=86 isotope 140Xe, located northeast of a doubly-magic nucleus 132Sn, is investigated by β-γ spectroscopy. Two β-decay isomers in I140 are newly found in the study of two different β decays of I140 which were produced by two reactions (i) direct in-flight fission at a primary target and (ii) β decay of Te140 at an active stopper. Half-lives of the β decays of the ground state, the low-spin isomer, and the high-spin isomer are determined to be 0.38(2), 0.91(5), and 0.47(4) s, respectively. Decay schemes of the β decay of the high-spin isomer and of the mixed β decays of the ground state and the low-spin isomer in I140 to Xe140 are constructed using the information on γ-ray coincidence relation and γ-ray intensity. Nuclear structures of the low-lying states in Xe140 and I140 are discussed by comparing the experimental results to two theoretical calculations based on a large-scale shell model and the deformed Skyrme Hartree-Fock-Bogoliubov plus deformed quasiparticle-random-phase approximation. Possible candidates for (quasi-)γ-band members of 2+ and 4+ states and the octupole collective 1-state are proposed in Xe140. Increase of quadrupole, triaxial, and octupole collectivities is discussed with the increase of neutron and proton numbers.

    DOI: 10.1103/PhysRevC.105.044325

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  • α-decay-correlated mass measurement of ^(206,207g,m)Ra using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system 査読有り

    T. Niwase, M. Wada, P. Schury, P. Brionnet, S. D. Chen, T. Hashimoto, H. Haba, Y. Hirayama, D. S. Hou, S. Iimura, H. Ishiyama, S. Ishizawa, Y. Ito, D. Kaji, S. Kimura, J. Liu, H. Miyatake, J. Y. Moon, K. Morimoto, K. Morita, D. Nagae, M. Rosenbusch, A. Takamine, T. Tanaka, Y. X. Watanabe, H. Wollnik, W. Xian, S. X. Yan

    Physical Review C104 ( 4 )   2021年10月20日

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevc.104.044617

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.104.044617/fulltext

  • First high-precision direct determination of the atomic mass of a superheavy nuclide 査読有り

    P. Schury, T. Niwase, M. Wada, P. Brionnet, S. Chen, T. Hashimoto, H. Haba, Y. Hirayama, D. S. Hou, S. Iimura, H. Ishiyama, S. Ishizawa, Y. Ito, D. Kaji, S. Kimura, H. Koura, J. J. Liu, H. Miyatake, J.-Y. Moon, K. Morimoto, K. Morita, D. Nagae, M. Rosenbusch, A. Takamine, Y. X. Watanabe, H. Wollnik, W. Xian, S. X. Yan

    Physical Review C104 ( 2 )   2021年8月31日

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevc.104.l021304

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.104.L021304/fulltext

  • Three-dimensional tracking multi-segmented proportional gas counter for β-decay spectroscopy of unstable nuclei 査読有り

    Y. Hirayama, P. Schury, M. Mukai, H. Choi, S. Iimura, Y.X. Watanabe, M. Wada, H. Watanabe, H. Miyatake

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment997   165152 - 165152   2021年5月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.nima.2021.165152

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  • Accurately accounting for effects on times-of-flight caused by finite field-transition times during the ejection of ions from a storage trap: A study for single-reference TOF and MRTOF mass spectrometry 査読有り

    M. Rosenbusch, P. Schury, M. Wada, S. Iimura, Y. Ito, H. Wollnik

    International Journal of Mass Spectrometry456   116346 - 116346   2020年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    In applied forms of time-of-flight mass spectrometry utilizing ion storage devices prior to an analysis device, a non instantaneous electric ejection pulse applied in the region of ion storage is used to accelerate ions into the time-of-flight analyzer. The calculated mass value of the ions from the time-of flight is dependent on the duration of the field transition up to full strength. For novel applications dedicated to precision measurements, such as multi-reflection time-of-flight mass spectrometry of short-lived isotopes, the goal is to continuously decrease the measurement uncertainty while providing a mass accuracy on the same order. Even though dynamic-field models for time-of-flight mass spectrometry have been considered in the past for technological advances, it is important to study the accuracy of the measured mass in this context. Using a simplified linear model for the field transition, we provide a basic investigation of the scenario, and discuss the deviation from the classical "mass-overcharge" dependency of the ions' time-of-flight, which becomes violated. The emerging mass discrepancy depends on the distance between the mass of the ion used for calibration and that of the ion of interest and, in extreme cases, can increase to about one percent for systems with short times-of-flight. However, for typical conditions in single-reference multi-reflection time-of-flight mass spectrometry, mass deviations caused by this effect typically remain below the 1 ppm level. If a mass calibration using two or more ion species is possible during the measurement, the effect becomes negligible for appropriate choices of reference masses. (c) 2020 Published by Elsevier B.V.

    DOI: 10.1016/j.ijms.2020.116346

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  • Conceptual study on parasitic low-energy RI beam production with in-flight separator BigRIPS and the first stopping examination for high-energy RI beams in the parasitic gas cell 査読有り

    T Sonoda, I Katayama, M Wada, H Iimura, V Sonnenschein, S Iimura, A Takamine, M Rosenbusch, T M Kojima, D S Ahn, N Fukuda, T Kubo, S Nishimura, Y Shimizu, H Suzuki, H Takeda, M Tanigaki, H Tomita, K Yoshida, H Ishiyama

    Progress of Theoretical and Experimental Physics2019 ( 11 )   2019年11月1日

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Oxford University Press (OUP)  

    Abstract

    An in-flight separator performs the important role of separating a single specific radioactive isotope (RI) beam from the thousands of RI beams produced by in-flight fission as well as projectile fragmentation. However, when looking at ``separation'' from a different viewpoint, more than 99% of simultaneously produced RI beams are just eliminated in the focal plane slits or elsewhere in the separator. In order to enhance the effective usability of the RIKEN in-flight separator BigRIPS, we have been developing an innovative method: parasitic laser ion source (PALIS), which implements parasitic low-energy RI beam production by saving eliminated RI beams during BigRIPS experiments. In this paper, we present the expected benefits and feasibility for the PALIS concept and the results of the first stopping examination for high-energy RI beams in the gas cell.

    DOI: 10.1093/ptep/ptz120

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MISC

  • MRTOF+α-TOFによる<sup>257,258</sup>Dbの精密質量測定

    庭瀬暁隆, SCHURY P., 和田道治, BRIONNET P., CHEN S., 羽場宏光, 平山賀一, HOU D. S., HOU D. S., HOU D. S., 飯村俊, 飯村俊, 飯村俊, 石山博恒, 伊藤由太, 加治大哉, 木村創大, 小浦寛之, 宮武宇也, 森本幸司, 森田浩介, 森田浩介, 森田浩介, 長江大輔, ROSENBUSCH M., 高峰愛子, 渡辺裕, WOLLNIK H., XIAN W., XIAN W., YAN S. X.

    日本物理学会講演概要集(CD-ROM)77 ( 1 )   2022年

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  • Status of the mass measurement of neutron-rich nuclei at A ~ 50–60 using SLOWRI/ZD-MRTOF 査読有り

    S. Iimura, M. Rosenbusch, A. Takamine, D. S. Hou, M. Wada, S. Chen, J. Liu, W. Xian, S. Yan, P. Schury, S. Kimura, T. Niwase, Y. Ito, T. Sonoda, T. M. Kojima, Y. X. Watanabe, S. Naimi, S. Michimasa, S. Nishimura, A. Odahara, H. Ishiyama

    RIKEN Accelerator Progress Report 2021 Vol. 55   2022年

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  • BigRIPS SLOWRIにおけるRFカーペットガスセルの開発-オンライン実験と質量測定-

    飯村俊, 飯村俊, 高峰愛子, ROSENBUSCH M., 和田道治, CHEN S., HOU D., LIU J., XIAN W., YAN S., SCHURY P., 木村創大, 庭瀬暁隆, 伊藤由太, 園田哲, 小島隆夫, 渡辺裕, NAIMI S., 道正新一郎, 西村俊二, 小田原厚子, 石山博恒

    日本物理学会講演概要集(CD-ROM)76 ( 1 )   2021年

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  • Online extraction efficiency from RF ion guide gas cell at SLOWRI 査読有り

    S. Iimura, A. Takamine, D. S. Hou, M. Rosenbusch, M. Wada, S. Chen, J. Liu, W. Xian, S. Yan, P. Schury, S. Kimura, T. Niwase, Y. Ito, T. Sonoda, T. M. Kojima, Y. X. Watanabe, S. Naimi, S. Michimasa, S. Nishimura, A. Odahara, H. Ishiyama

    RIKEN Accelerator Progress Report 2020 Vol. 54   2021年

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  • Development of RF Carpet Type Gas Cell in SLOWRI for BigRIPS Beam

    S. Iimura, A. Takamine, M. Rosenbusch, M. Wada, S. Chen, J. Liu, P. Schury, T. Sonoda, T. M. Kojima, Y. X. Watanabe, A. Odahara, H. Ishiyama

    Proceedings of the Specialists' Meeting on "Nuclear Spectroscopy and Condensed Matter Physics Using Short-Lived Nuclei Ⅵ" and Meeting on "11th Nuclear Spectroscopy Research Using Stop and Slow Unstable Nuclei (SSRI)"   2020年6月

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  • Second report on offline tests for RF carpet transportation in RF ion guide gas cell at the SLOWRI facility 査読有り

    S. Iimura, A. Takamine, M. Rosenbusch, M. Wada, S. Chen, J. Liu, P. Schury, T. Sonoda, T. M. Kojima, Y. X. Watanabe, A. Odahara, H. Ishiyama

    RIKEN Accelerator Progress Report 2019 Vol. 53   2020年

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  • Study of neutron unbound states in 18O by β-delayed neutron decay of 18N 査読有り

    H. Umehara, S. Iimura, S. Kanaya, T. Hara, M. Kinoshita, R. Nakajima, R. Shudo, R. Wakabayashi, M. Fukutome, M. Hisamatsu, H. Nishibata, T. Shimoda, A. Odahara

    RCNP Annual Report 2018   2019年4月

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  • Precision half-life measurement of 18N

    S.Iimura, M. Fukutome, M. Hisamatsu, H. Umehara, S. Kanaya, H. Nishibata, A. Odahara, T. Shimoda, T. Hara, M. Kinoshita, R. Nakajima, R. Shudo, R. Wakabayashi

    Bulletin of the American Physical Society63 ( 12 )   2018年10月

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講演・口頭発表等

  • A new study of the N=32 and N=34 shell gap for Ti and V by the first high-precision MRTOF mass measurements at BigRIPS-SLOWRI 招待有り

    S. Iimura

    RIBF Users Meeting 2022  2022年9月 

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    会議種別:口頭発表(招待・特別)  

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  • 理研BigRIPS SLOWRIにおけるZD-MRTOF装置を用いた中性子過剰Sc, Ti, V核の系統的核構造研究

    飯村俊, M.Rosenbusch, 高峰愛子, 和田道治, S. Chen, D. Hou, J. Liu, W. Xian, S. Yan, P. Schury, 木村創大, 庭瀬暁隆, 伊藤由太, 園田哲, 小島隆夫, 渡辺裕, 平山賀一, 宮武宇也, S. Naimi, 道正新一郎, 西村俊二, 小田原厚子, 石山博恒, 角田佑介, 清水則孝, 大塚孝治

    日本物理学会2022年秋季大会  2022年9月 

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    会議種別:口頭発表(一般)  

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  • Mass measurement of neutron-rich nuclei of Sc, Ti, and V region using the new ZD-MRTOF system

    S. Iimura, M. Rosenbusch, A. Takamine, M. Wada, S. Chen, D. Hou, J. Liu, W. Xian, S. Yan, P. Schury, S. Kimura, T. Niwase, H. Koura, Y. Ito, T. Sonoda, T. M. Kojima, Y. X. Watanabe, Y. Hirayama, H. Miyatake, S. Naimi, S. Michimasa, S. Nishimura, A. Odahara, H. Ishiyama

    The 16th International Symposium on Nuclei in the Cosmos  2021年9月 

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    会議種別:ポスター発表  

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  • Mass measurement of neutron-rich nuclei of Sc, Ti, and V region using the new ZD-MRTOF system

    S. Iimura, M. Rosenbusch, A. Takamine, M. Wada, S. Chen, D. Hou, J. Liu, W. Xian, S. Yan, P. Schury, S. Kimura, T. Niwase, H. Koura, Y. Ito, T. Sonoda, T. M. Kojima, Y. X. Watanabe, Y. Hirayama, H. Miyatake, S. Naimi, S. Michimasa, S. Nishimura, A. Odahara, H. Ishiyama

    日本物理学会2021年秋季大会  2021年9月 

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    記述言語:英語   会議種別:口頭発表(一般)  

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  • 理研 BigRIPS SLOWRI におけるRFカーペットガスセルの開発 ―オンライン実験と質量測定―

    飯村俊, 高峰愛子, M. Rosenbusch, 和田道治, S. Chen, D. Hou, J. Liu, W. Xian, S. Yan, P. Schury, 木村創大, 庭瀬暁隆, 伊藤由太, 園田哲, 小島隆夫, 渡辺裕, S, Naimi, 道正新一郎, 西村俊二, 小田原厚子, 石山博恒

    第76回日本物理学会年次大会  2021年3月 

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    会議種別:口頭発表(一般)  

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  • 理研 BigRIPS SLOWRIにおけるRFカーペットガスセルの開発

    飯村俊, 高峰愛子, M. Rosenbusch, 和田道治, S. Chen, J. Liu, W. Xian, D. Hou, S. Yan, P. Schury, 園田哲, 小島隆夫, 渡辺裕, 小田原厚子, 石山博恒

    日本物理学会2020年秋季大会  2020年9月 

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    会議種別:口頭発表(一般)  

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  • 理研BigRIPS SLOWRIにおけるRFカーペットガスセルの開発

    飯村俊, 高峰愛子, M. Rosenbusch, 和田道治, S. Chen, J. Liu, P. Schury, 園田哲, 小島隆夫, 渡辺裕, 小田原厚子, 石山博恒

    令和元年度KUR専門研究会「短寿命RIを用いた核分光と核物性研究Ⅵ」兼「第11回停止・低速RIビームを用いた核分光研究会」  2020年1月 

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    会議種別:口頭発表(一般)  

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  • Development of gas cell to stop and collect high energy RI beam, and extract radioactive ions with a high efficiency

    S. Iimura, A. Takamine, J. Liu, S. Chen, M. Rosenbusch, M. Wada, H. Ishiyama

    The ALL-RIKEN Workshop 2019  2019年12月 

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    会議種別:ポスター発表  

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  • High Precision Half-life Measurement of 18N

    S. Iimura, M. Fukutome, M. Hisamatsu, H. Umehara, S. Kanaya, H. Nishibata, A. Odahara, T. Shimoda, T. Hara, M. Kinoshita, R. Nakajima, R. Shudo, R. Wakabayashi

    5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan  2018年10月 

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    会議種別:口頭発表(一般)  

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  • Efficiency of EURICA for low-energy gamma-ray by using Geant4

    S. Iimura, A. Odahara, A. Yagi, P. Lee, the EURICA collaboration

    The 16th CNS International Summer School  2017年8月 

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    会議種別:ポスター発表  

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  • Inertia Experiment Device & Huge Scaled Dynamics Carts

    S. Iimura, Y. Gomi, Y. Kawamura

    2016 International Conference of East-Asian Association for Science Education  2016年8月 

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    会議種別:その他  

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担当経験のある科目(授業)

  • 2022年4月 - 現在 
    物理学実験(生) ( 立教大学 )

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  • 2022年4月 - 現在 
    物理学1 ( 立教大学 )

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  • 2022年4月 - 現在 
    物理学実験1 ( 立教大学 )

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共同研究・競争的資金等の研究

  • スピンを偏極させた不安定核ビームによる新奇な原子核構造の核心的理解

    日本学術振興会  科学研究費助成事業 国際共同研究加速基金(国際共同研究強化(B)) 

    小田原 厚子, 西畑 洸希, 畠山 温, 平山 賀一, 飯村 俊

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    2022年10月 - 2026年3月

    課題番号:22KK0041

    配分額:20020000円 ( 直接経費:15400000円 、 間接経費:4620000円 )

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