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Production of Light Single-LAMBDA and Double-LAMBDA Hypernuclei in XI^- Atomic Capture Reaction

Research Project

Project/Area Number 06640415
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 素粒子・核・宇宙線
Research InstitutionKanto Gakuin University

Principal Investigator

YAMADA Taiichi  Kanto Gakuin University, College of Engineering, Assistant Professor, 工学部, 助教授 (70200722)

Co-Investigator(Kenkyū-buntansha) IKEDA Kiyomi  Niigata University, Faculty of Science, Professor, 理学部, 教授 (40011548)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsHypernuclei / Hyperon / Strangeness / Nuclear theory / Atomic capture reaction / Double-LAMBDA hypernucleus / Nuclear deep-hole state / Selection rule / ハイパー核 / ストレンジネス / ダブルラムダ核 / 核反応 / グナイ粒子
Research Abstract

1) The production rates per XI for the LAMBDALAMBDA^<12>Be+p, LAMBDALAMBDA^<12>B+n, LAMBDALAMBDA^<11>Be+d, LAMBDALAMBDA^9Li+alpha, LAMBDALAMBDA^<10>Be+t, LAMBDALAMBDA^6He+^7Li, LAMBDALAMBDA^5He+^8Be, LAMBDA^8Li+LAMBDA^5He, LAMBDA^9Be+LAMBDA^4H and LAMBDA^<12>B+LAMBDA channels (including their excited channels) via the ^<12>C-XI^- atomic states have investigated within the fame of the doorway double-LAMBDA hypernuclear picture (direct reaction picture). We found that in the stopped XI^- reaction the excited double-LAMBDA hypernuclear states for LAMBDALAMBDA^<12>B,LAMBDALAMBDA^<12>Be and LAMBDALAMBDA^<11>Be are greatly produced via the resonant states of the final double-LAMBDA hypernuclear channels. The following sequential process is possible ; (^<12>C,XI^-) atom * LAMBDALAMBDA^<12>B^<**>+n * LAMBDALAMBDA^<11>Be+p+n or LAMBDALAMBDA^<11>B+n+n. This process is similar to the sequential process for LAMBDALAMBDA^<13>B production observed in the KEK-E176 experiment, (^<14>N,XI^-) atom ** LA … More MBDALAMBDA^<14>C^*+n * LAMBDALAMBDA^<13>B+p+n. The calculated double-LAMBDA sticking probability is about 5 %, which is in correspondence to the experimental data.
2) The excitation functions of the ^9Be(K^-, K^+)XI^9He reaction at P_K=1.6 GeV/c and rheta=0゚were ecaluated with the Woods-Saxon type (VO=-24 and -16 MeV) and folding-type (YNG-ND No.1 and No.2) XI^--^8Linuclear potentials. The XI^--^8Li nuclear potentials except the folding potential (YNG-ND No.1) gives a broad peak at the XI bound-state region, which cross section is 0.02 - 0.08mub (0.2nb for YNG-ND No.1). The peak consists of the three component coming from the three XI^9He bound states. We estimated the production cross section of XI^9He (g.s.) * LAMBDALAMBDA^8He + n for the XI^--^8Li nuclear potentials. The calculated production rates were about 0.4%, and then, the production cross sections were 0.03 - 0.1 nb (0.3 pb) for the XI^--^8Li nuclear potentials except the folding potential (YNG-ND No.1)
3) A selection rule for fragmentations of doorway s-hole states in light nuclei was given. In the two-body fragmentation process of the doorway s-hole states in light nuclei, smaller fragments than the alpha particle (p, n, d, t, and 3He) are allowed, while the fragments such as the alpha particle and the larger particles are forbidden, in spite of the fact that the Q value for the alpha fragment is similar to or even larger than those for the p, n, and d fragments. The selection rule comes from the spatial symmetry of the dooray s-hole states, The spectroscopic factors and partial widths for the two-body fragmentations of the s-hole of ^<11>B and ^<15>N are calculated to show the selection rule. The calculated escaping widths for the ^1B (s-hole) and ^<15>N (s-hole) doorway states are ingood correspondence with the experimental widths. This may suggest that the following scenario is realized ; in the light nuclei the fragmentation process of the s-hole state in the doorway stage is superior or competitive to that in the compound nuclear stage. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (46 results)

All Other

All Publications (46 results)

  • [Publications] T.Yamada: "A Review on Highly Excited States of Light Λ-Hypernucle" Progress of Theoretical Physics Supplement. 117. 65-98 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Possible Existence of Light Σ Hypernuclei" Progress of Theoretical Physics Supplement. 117. 201-225 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Σ^- atoms ^4_ΣH_e Hypernucleus with Σ-N Interactions" Progress of Theoretical Physics Supplement. 117. 241-250 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Hypernuclei and Deep Hole States" Progress of Theoretical Physics Supplement. 117. 445-460 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Core-excited α-cluster Structure in ^<44>Ti" Zeitschrift fur Physik A. 349. 363-365 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Twin Λ-hypernuclear production in Ξ^--atomic capture into ^<12>C" Nuclear Physics A. 585. 79c-82c (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Resonances of Nuclear Cluster Systems with Complex-Scaled Resonating Group Method" The Journal of Thechnological Researches,The College of Engineering,Kanto Gakuin University. 38. 37-45 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Ohkura: "Highly Excited Odd-Parity Resonant States of ^6Li around Ex=18-27MeV with the Complex-Scaled ^3He+t Resonating Group Method" Progress of Theoretical Physics. 94. 47-63 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Double-Λ and Twin-Λ Hypernulear Production in Ξ^--atomic Capture into ^<12>C" Proceedings of the 23rd INS International Symposium on Nuclear and Particle Physics with Meson Beams in the 1 GeV/c Region,eds.S.Sugimoto and O.Hashimoto,. 279-280 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Production of Double-Λ and Twin-Λ HYpernuclei in Ξ^--atomic Capture Reaction" Proceedings of the 6th International Conference on Mesons and Light Nuclei,eds.J.Adam et al.,. 281-284 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Double-Λ and Twin-Λ Hypernuclear Production in Ξ^--atomic Capture into ^<12>C" Genshikaku Kenkyuu. 40. 23-25 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Selection Rule for Fragmentation of Doorway S-Hole States in Light Nuclei" Physical Review C. 53. 752-764 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] E.Hiyama: "Three-boby model study of A=6-7 hypernuclei : Halo and skin structures" Physical Review C. 53. 2075-2085 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Selection Rule for Fragmentation of Doorway S-Hole States in Ligrh Nuclei" Proceedings of the XIV RCNP Osaka International Symposium on Nuclear Reaction Dynamics of Nucleon-Hadron Many Body System,eds.H.Ejiri et al.,. 334-335 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Toyokawa: "Cluster Decay from the Deep-Hole State in ^<11>B" Proceedings of the XIV RCNP Osaka Internataonal Symposium on Nuclear Reaction Dynamics of Nucleon-Hodron Many Body System, eds. H.Ejiri et al.,. 339-343 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Double-Λ,Twin-Λ and Single-Λ Hypernuclear Production for Stopped Ξ^-Particle in ^<12>C" Preprint KGU-P9601 (Kanto Gakuin University). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Double-Λ Hypernuclear Production via Ξ Hypernuclear States in the ^9Be(K^-,K^+)Ξ^9He reaction" Preprint KGU-P9602 (Kanto Gakuin University). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada, H.Ohkura, T.Motoba and K.Ikeda: "A Review on Highly Excited States of Light LAMBDA-Hypernuclei" Progress of Theoretical Physics Supplement. No.117. 65-98 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Possible Existence of Light SIGMA Hypernuclei" Progress of Theoretical Physics Supplement. No.117. 201-225 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and Y.Yamamoto: "SIGMA^- atoms and ^4_MAHe Hypernucleus with SIGMA-N Interactions" Progress of Theoretical Physics Supplement. No.117. 241-250 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Hypernuclei and Deep Hole States" Progress of Theoretical Physics Supplement. No.117. 445-460 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and S.Ohkubo: "Core-excited alpha-cluster Structure in ^<44>Ti" Zeitschrift fur Physik A349. 363-365 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Twin LAMBDA-hypernuclear production in XI^--atomic capture into ^<12>C" Nuclear Physics. A585. 79c-82c (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Resonances of Nuclear Cluster Systems with Complex-Scaled Resonating Group Method" The Journal of Thechonlogical Researches, the College of Engineering, Kanto Gakuin University. Vol.38, No.2. 37-45 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Ohkura, T.Yamada and K.Ikeda: "Highly Excited Odd-Parity Resonant States of ^6Li around E_X=18-27 MeV with the Complex-Scaled ^3He+t Resonating Group Method" Progress of Theoretical Physics. 94. 47-63 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Double-LAMBDA and Twin-LAMBDA Hypernuclear Production in XI^--atomic Capture into ^<12>C" Proceedings of the 23rd INS International Symposium on Nuclear and Particle Physics with Meson Beams in the CeV/c Region, eds.S.Sugimoto and O.Hashimoto, (March 15-18,1995, Tokyo, Japan). 279-280

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Production of Double-LAMBDA and Twin-LAMBDA Hypernuclei in XI^--atomic Capture Reaction" Proceedings of the 6th International Conference on Mesons and Light Nuclei, eds.J.Adam et al., (July 3-7,1995, Straz pod Ralskem, Czech Republic). 281-284

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada: "Double -LAMBDA and Twin-LAMBDA Hypernuclear Production in XI^--atomic Capture into ^<12>C" Genshikaku Kenkyuu. 40. 23-25 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada, M.Takahashi and K.Ikeda: "Selection Rule for Fragmentation of Doorway S-Hole States in Light Nuclei" Physical Review. C53. 752-764 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] E.Hiyama, M.Kamimura, T.Motoba, T.Yamada and Y.Yamamoto: "Three-body model study of A=6-7 hypernuclei : Halo and skin structures" Physical Review. C53. 2075-2085 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada M.Takahashi and K.Ikeda: "Selection Rule for Fragmentation of Doorway S-Hole States in Light Nuclei" Proceedings of the XIV RCNP Osaka International Symposium on Nuclear Reaction Dynamics of Nucleon-Hardron Many Body System, eds.H.Ejiri et al., (December 6-9,1995, Osaka, Japan). 334-335

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Toyokawa, H.Akimune, T.Baba, I.Daido, H.Ejiri, M.Fujiwara, T.Inomata, M.Kawabata, T.Kinashi, T.Noro, A.Tamii, M.Tanaka, T.Yamada, and M.Yosoi: "Cluster Decay from the Deep-Hole State in ^<11>B" Proceedings of the XIV RCNP Osaka International Symposium on Nuclear Reaction Dynamics of Nucleon-Hadron Many Body System, eds.H.Ejiri et al., (December 6-9,1995, Osaka, Japan). 339-343

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Double-LAMBDA, Twin-LAMBDA and Single-LAMBDA Hypernuclear Productions for Stopped XI^-Particle in ^<12>C" Prepint KGU-P960 (Kanto Gakuin University). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Yamada and K.Ikeda: "Double-LAMBDA Hypernuclear Production via XI Hypernuclear States in the ^9Be (K^-, K^+) XI^9He reaction" Preprint KGU-P9602 (Kanto Gakuin University). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] To Yamada et al.: "Twin Λ-hypernuclear production in Ξ^--atomic capture into ^<12>C" Nuclear Physics A. 585. 79-82 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H. Ohkura et al: "Highly Excited Odd-Parity Rescncmt States of ^6Li around Ex=18-27MeV with the Complex-Scaled ^3He+t Resonnlthg Group Method" Progress of Theoretical Physics. 94. 47-63 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] To Yamada et al: "Double-Λ an Twin-Λ Hypernuclear Production in Ξ^--atomic Capture into ^<12>C" Proceedings of the 23rd INS International Symposium on Nuclear and Parhel Physics with Heson Beans in the 1GeV/CRegion ecls. S.Sugict atl. 279-280 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] To Yamada et al.: "Production of Double-Λ and Twin-Λ Hypernuclear in Ξ^--atomic Capture Reaction" Few-Body Systems Supplememtim. 9. 281-284 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] To Yamada et al.: "Selection Rule for Fragmentation of Doorwy S-Hole States in Light Nuclear" Physical Review C. 53. 752-764 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] E.Hiyama et al.: "Three-body model study of A=6-7 hypernuclear Halo and skin structure" Physical Review C. 53(予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Yamada: "Core-excited α-cluster structure in ^<44>Ti" Zeitshrift fur Physik. A349. 363-365 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yamada: "A Review on Highly Excited States in Light Λ-Hypernuclei" Progress of Theoretical Physics Supplement. 117. 65-98 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yamada: "Possible Existence of Light Σ=Hypernuclei" Progress of Theoretical Physics Supplement. 117. 201-226 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yamada: "Σ^- Atoms and ^4_ΣHe Hypernucleus with Σ-N Interactions" Progress of Theoretical Physics Supplement. 117. 241-250 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yamada: "Hypernuclei and Deep Hole States" Progress of Theoretical Physics Supplement. 117. 445-460 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yamada: "Resonances of Nuclear Cluster Systems with Complex-Scaled Resonating Group Methud" 関東学院大学工学部工学会研究報告. 38. 37-46 (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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