The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector

Y. Katayose, M. Amenomori, S. Ayabe, D. Chen, S. W. Cui, Danzengluobu, L. K. Ding, X. H. Ding, C. F. Feng, Z. Y. Feng, X. Y. Gao, Q. X. Geng, H. W. Guo, H. H. He, M. He, K. Hibino, N. Hotta, Haibing Hu, H. B. Hu, J. Huang & 58 others Q. Huang, H. Y. Jia, F. Kajino, K. Kasahara, C. Kato, K. Kawata, Labaciren, G. M. Le, J. Y. Li, H. Lu, S. L. Lu, X. R. Meng, K. Mizutani, J. Mu, K. Munakata, A. Nagai, H. Nanjo, M. Nishizawa, M. Ohnishi, I. Ohta, H. Onuma, T. Ouchi, Shunsuke Ozawa, J. R. Ren, T. Saito, M. Sakata, T. Sasaki, M. Shibata, A. Shiomi, T. Shirai, H. Sugimoto, M. Takita, Y. H. Tan, N. Tateyama, Shoji Torii, H. Tsuchiya, S. Udo, H. Wang, X. Wang, Y. G. Wang, H. R. Wu, L. Xue, Y. Yamamoto, C. T. Yan, X. C. Yang, S. Yasue, Z. H. Ye, G. C. Yu, A. F. Yuan, T. Yuda, H. M. Zhang, J. L. Zhang, N. J. Zhang, X. Y. Zhang, Y. Zhang, Yi Zhang, Zhaxisangzhu, X. X. Zhou

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    A hybrid experiment was carried out to study the cosmic-ray primary composition in the 'knee' energy region. The experimental set-up consists of the Tibet-II air shower array( AS ), the emulsion chamber ( EC ) and the burst detector ( BD ) which are operated simulteneously and provides us information on the primary species. For three-year operation, we have observed 177 γ -families ( ∑Eγ 20 TeV ) accompanying air showers with the shower size Ne≥ × 105. Using this data set and a neural network method to select proton and helium induced events, the primary proton and helium energy spectra are obtained between 1015 and 10 16. The proton spectrum, thus obtained, can be expressed by a single power-law function with a differential index of -3.01 ± 0.11 and -3.05 ± 0.12 based on the QGSJET+HD and SIBYLL+HD models, respectively, which are steeper than that extrapolated from the direct observations of -2.74 ± 0.01 vin the energy range below (1014eV. Our experiment suggests that the main component responsible for making the knee structure of the all-particle spectrum is composed of nuclei heavier than helium.

    Original languageEnglish
    Title of host publication29th International Cosmic Ray Conference, ICRC 2005
    PublisherTata Institute of Fundamental Research
    Pages185-188
    Number of pages4
    Volume6
    Publication statusPublished - 2005
    Event29th International Cosmic Ray Conference, ICRC 2005 - Pune
    Duration: 2005 Aug 32005 Aug 10

    Other

    Other29th International Cosmic Ray Conference, ICRC 2005
    CityPune
    Period05/8/305/8/10

    Fingerprint

    Tibet
    cosmic ray showers
    energy spectra
    helium
    detectors
    primary cosmic rays
    protons
    heavy nuclei
    showers
    proton energy
    emulsions
    bursts
    chambers
    energy

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Katayose, Y., Amenomori, M., Ayabe, S., Chen, D., Cui, S. W., Danzengluobu, ... Zhou, X. X. (2005). The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector. In 29th International Cosmic Ray Conference, ICRC 2005 (Vol. 6, pp. 185-188). Tata Institute of Fundamental Research.

    The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector. / Katayose, Y.; Amenomori, M.; Ayabe, S.; Chen, D.; Cui, S. W.; Danzengluobu; Ding, L. K.; Ding, X. H.; Feng, C. F.; Feng, Z. Y.; Gao, X. Y.; Geng, Q. X.; Guo, H. W.; He, H. H.; He, M.; Hibino, K.; Hotta, N.; Hu, Haibing; Hu, H. B.; Huang, J.; Huang, Q.; Jia, H. Y.; Kajino, F.; Kasahara, K.; Kato, C.; Kawata, K.; Labaciren; Le, G. M.; Li, J. Y.; Lu, H.; Lu, S. L.; Meng, X. R.; Mizutani, K.; Mu, J.; Munakata, K.; Nagai, A.; Nanjo, H.; Nishizawa, M.; Ohnishi, M.; Ohta, I.; Onuma, H.; Ouchi, T.; Ozawa, Shunsuke; Ren, J. R.; Saito, T.; Sakata, M.; Sasaki, T.; Shibata, M.; Shiomi, A.; Shirai, T.; Sugimoto, H.; Takita, M.; Tan, Y. H.; Tateyama, N.; Torii, Shoji; Tsuchiya, H.; Udo, S.; Wang, H.; Wang, X.; Wang, Y. G.; Wu, H. R.; Xue, L.; Yamamoto, Y.; Yan, C. T.; Yang, X. C.; Yasue, S.; Ye, Z. H.; Yu, G. C.; Yuan, A. F.; Yuda, T.; Zhang, H. M.; Zhang, J. L.; Zhang, N. J.; Zhang, X. Y.; Zhang, Y.; Zhang, Yi; Zhaxisangzhu; Zhou, X. X.

    29th International Cosmic Ray Conference, ICRC 2005. Vol. 6 Tata Institute of Fundamental Research, 2005. p. 185-188.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Katayose, Y, Amenomori, M, Ayabe, S, Chen, D, Cui, SW, Danzengluobu, Ding, LK, Ding, XH, Feng, CF, Feng, ZY, Gao, XY, Geng, QX, Guo, HW, He, HH, He, M, Hibino, K, Hotta, N, Hu, H, Hu, HB, Huang, J, Huang, Q, Jia, HY, Kajino, F, Kasahara, K, Kato, C, Kawata, K, Labaciren, Le, GM, Li, JY, Lu, H, Lu, SL, Meng, XR, Mizutani, K, Mu, J, Munakata, K, Nagai, A, Nanjo, H, Nishizawa, M, Ohnishi, M, Ohta, I, Onuma, H, Ouchi, T, Ozawa, S, Ren, JR, Saito, T, Sakata, M, Sasaki, T, Shibata, M, Shiomi, A, Shirai, T, Sugimoto, H, Takita, M, Tan, YH, Tateyama, N, Torii, S, Tsuchiya, H, Udo, S, Wang, H, Wang, X, Wang, YG, Wu, HR, Xue, L, Yamamoto, Y, Yan, CT, Yang, XC, Yasue, S, Ye, ZH, Yu, GC, Yuan, AF, Yuda, T, Zhang, HM, Zhang, JL, Zhang, NJ, Zhang, XY, Zhang, Y, Zhang, Y, Zhaxisangzhu & Zhou, XX 2005, The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector. in 29th International Cosmic Ray Conference, ICRC 2005. vol. 6, Tata Institute of Fundamental Research, pp. 185-188, 29th International Cosmic Ray Conference, ICRC 2005, Pune, 05/8/3.
    Katayose Y, Amenomori M, Ayabe S, Chen D, Cui SW, Danzengluobu et al. The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector. In 29th International Cosmic Ray Conference, ICRC 2005. Vol. 6. Tata Institute of Fundamental Research. 2005. p. 185-188
    Katayose, Y. ; Amenomori, M. ; Ayabe, S. ; Chen, D. ; Cui, S. W. ; Danzengluobu ; Ding, L. K. ; Ding, X. H. ; Feng, C. F. ; Feng, Z. Y. ; Gao, X. Y. ; Geng, Q. X. ; Guo, H. W. ; He, H. H. ; He, M. ; Hibino, K. ; Hotta, N. ; Hu, Haibing ; Hu, H. B. ; Huang, J. ; Huang, Q. ; Jia, H. Y. ; Kajino, F. ; Kasahara, K. ; Kato, C. ; Kawata, K. ; Labaciren ; Le, G. M. ; Li, J. Y. ; Lu, H. ; Lu, S. L. ; Meng, X. R. ; Mizutani, K. ; Mu, J. ; Munakata, K. ; Nagai, A. ; Nanjo, H. ; Nishizawa, M. ; Ohnishi, M. ; Ohta, I. ; Onuma, H. ; Ouchi, T. ; Ozawa, Shunsuke ; Ren, J. R. ; Saito, T. ; Sakata, M. ; Sasaki, T. ; Shibata, M. ; Shiomi, A. ; Shirai, T. ; Sugimoto, H. ; Takita, M. ; Tan, Y. H. ; Tateyama, N. ; Torii, Shoji ; Tsuchiya, H. ; Udo, S. ; Wang, H. ; Wang, X. ; Wang, Y. G. ; Wu, H. R. ; Xue, L. ; Yamamoto, Y. ; Yan, C. T. ; Yang, X. C. ; Yasue, S. ; Ye, Z. H. ; Yu, G. C. ; Yuan, A. F. ; Yuda, T. ; Zhang, H. M. ; Zhang, J. L. ; Zhang, N. J. ; Zhang, X. Y. ; Zhang, Y. ; Zhang, Yi ; Zhaxisangzhu ; Zhou, X. X. / The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector. 29th International Cosmic Ray Conference, ICRC 2005. Vol. 6 Tata Institute of Fundamental Research, 2005. pp. 185-188
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    title = "The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector",
    abstract = "A hybrid experiment was carried out to study the cosmic-ray primary composition in the 'knee' energy region. The experimental set-up consists of the Tibet-II air shower array( AS ), the emulsion chamber ( EC ) and the burst detector ( BD ) which are operated simulteneously and provides us information on the primary species. For three-year operation, we have observed 177 γ -families ( ∑Eγ 20 TeV ) accompanying air showers with the shower size Ne≥ × 105. Using this data set and a neural network method to select proton and helium induced events, the primary proton and helium energy spectra are obtained between 1015 and 10 16. The proton spectrum, thus obtained, can be expressed by a single power-law function with a differential index of -3.01 ± 0.11 and -3.05 ± 0.12 based on the QGSJET+HD and SIBYLL+HD models, respectively, which are steeper than that extrapolated from the direct observations of -2.74 ± 0.01 vin the energy range below (1014eV. Our experiment suggests that the main component responsible for making the knee structure of the all-particle spectrum is composed of nuclei heavier than helium.",
    author = "Y. Katayose and M. Amenomori and S. Ayabe and D. Chen and Cui, {S. W.} and Danzengluobu and Ding, {L. K.} and Ding, {X. H.} and Feng, {C. F.} and Feng, {Z. Y.} and Gao, {X. Y.} and Geng, {Q. X.} and Guo, {H. W.} and He, {H. H.} and M. He and K. Hibino and N. Hotta and Haibing Hu and Hu, {H. B.} and J. Huang and Q. Huang and Jia, {H. Y.} and F. Kajino and K. Kasahara and C. Kato and K. Kawata and Labaciren and Le, {G. M.} and Li, {J. Y.} and H. Lu and Lu, {S. L.} and Meng, {X. R.} and K. Mizutani and J. Mu and K. Munakata and A. Nagai and H. Nanjo and M. Nishizawa and M. Ohnishi and I. Ohta and H. Onuma and T. Ouchi and Shunsuke Ozawa and Ren, {J. R.} and T. Saito and M. Sakata and T. Sasaki and M. Shibata and A. Shiomi and T. Shirai and H. Sugimoto and M. Takita and Tan, {Y. H.} and N. Tateyama and Shoji Torii and H. Tsuchiya and S. Udo and H. Wang and X. Wang and Wang, {Y. G.} and Wu, {H. R.} and L. Xue and Y. Yamamoto and Yan, {C. T.} and Yang, {X. C.} and S. Yasue and Ye, {Z. H.} and Yu, {G. C.} and Yuan, {A. F.} and T. Yuda and Zhang, {H. M.} and Zhang, {J. L.} and Zhang, {N. J.} and Zhang, {X. Y.} and Y. Zhang and Yi Zhang and Zhaxisangzhu and Zhou, {X. X.}",
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    TY - GEN

    T1 - The energy spectrum of the light components (P+He) at the knee obtained by the Tibet air shower core detector

    AU - Katayose, Y.

    AU - Amenomori, M.

    AU - Ayabe, S.

    AU - Chen, D.

    AU - Cui, S. W.

    AU - Danzengluobu,

    AU - Ding, L. K.

    AU - Ding, X. H.

    AU - Feng, C. F.

    AU - Feng, Z. Y.

    AU - Gao, X. Y.

    AU - Geng, Q. X.

    AU - Guo, H. W.

    AU - He, H. H.

    AU - He, M.

    AU - Hibino, K.

    AU - Hotta, N.

    AU - Hu, Haibing

    AU - Hu, H. B.

    AU - Huang, J.

    AU - Huang, Q.

    AU - Jia, H. Y.

    AU - Kajino, F.

    AU - Kasahara, K.

    AU - Kato, C.

    AU - Kawata, K.

    AU - Labaciren,

    AU - Le, G. M.

    AU - Li, J. Y.

    AU - Lu, H.

    AU - Lu, S. L.

    AU - Meng, X. R.

    AU - Mizutani, K.

    AU - Mu, J.

    AU - Munakata, K.

    AU - Nagai, A.

    AU - Nanjo, H.

    AU - Nishizawa, M.

    AU - Ohnishi, M.

    AU - Ohta, I.

    AU - Onuma, H.

    AU - Ouchi, T.

    AU - Ozawa, Shunsuke

    AU - Ren, J. R.

    AU - Saito, T.

    AU - Sakata, M.

    AU - Sasaki, T.

    AU - Shibata, M.

    AU - Shiomi, A.

    AU - Shirai, T.

    AU - Sugimoto, H.

    AU - Takita, M.

    AU - Tan, Y. H.

    AU - Tateyama, N.

    AU - Torii, Shoji

    AU - Tsuchiya, H.

    AU - Udo, S.

    AU - Wang, H.

    AU - Wang, X.

    AU - Wang, Y. G.

    AU - Wu, H. R.

    AU - Xue, L.

    AU - Yamamoto, Y.

    AU - Yan, C. T.

    AU - Yang, X. C.

    AU - Yasue, S.

    AU - Ye, Z. H.

    AU - Yu, G. C.

    AU - Yuan, A. F.

    AU - Yuda, T.

    AU - Zhang, H. M.

    AU - Zhang, J. L.

    AU - Zhang, N. J.

    AU - Zhang, X. Y.

    AU - Zhang, Y.

    AU - Zhang, Yi

    AU - Zhaxisangzhu,

    AU - Zhou, X. X.

    PY - 2005

    Y1 - 2005

    N2 - A hybrid experiment was carried out to study the cosmic-ray primary composition in the 'knee' energy region. The experimental set-up consists of the Tibet-II air shower array( AS ), the emulsion chamber ( EC ) and the burst detector ( BD ) which are operated simulteneously and provides us information on the primary species. For three-year operation, we have observed 177 γ -families ( ∑Eγ 20 TeV ) accompanying air showers with the shower size Ne≥ × 105. Using this data set and a neural network method to select proton and helium induced events, the primary proton and helium energy spectra are obtained between 1015 and 10 16. The proton spectrum, thus obtained, can be expressed by a single power-law function with a differential index of -3.01 ± 0.11 and -3.05 ± 0.12 based on the QGSJET+HD and SIBYLL+HD models, respectively, which are steeper than that extrapolated from the direct observations of -2.74 ± 0.01 vin the energy range below (1014eV. Our experiment suggests that the main component responsible for making the knee structure of the all-particle spectrum is composed of nuclei heavier than helium.

    AB - A hybrid experiment was carried out to study the cosmic-ray primary composition in the 'knee' energy region. The experimental set-up consists of the Tibet-II air shower array( AS ), the emulsion chamber ( EC ) and the burst detector ( BD ) which are operated simulteneously and provides us information on the primary species. For three-year operation, we have observed 177 γ -families ( ∑Eγ 20 TeV ) accompanying air showers with the shower size Ne≥ × 105. Using this data set and a neural network method to select proton and helium induced events, the primary proton and helium energy spectra are obtained between 1015 and 10 16. The proton spectrum, thus obtained, can be expressed by a single power-law function with a differential index of -3.01 ± 0.11 and -3.05 ± 0.12 based on the QGSJET+HD and SIBYLL+HD models, respectively, which are steeper than that extrapolated from the direct observations of -2.74 ± 0.01 vin the energy range below (1014eV. Our experiment suggests that the main component responsible for making the knee structure of the all-particle spectrum is composed of nuclei heavier than helium.

    UR - http://www.scopus.com/inward/record.url?scp=79551468962&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=79551468962&partnerID=8YFLogxK

    M3 - Conference contribution

    VL - 6

    SP - 185

    EP - 188

    BT - 29th International Cosmic Ray Conference, ICRC 2005

    PB - Tata Institute of Fundamental Research

    ER -