Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment

V. A. Derbina, V. I. Galkin, M. Hareyama, Y. Hirakawa, Y. Horiuchi, M. Ichimura, N. Inoue, Eiji Kamioka, T. Kobayashi, V. V. Kopenkin, S. Kuramata, A. K. Managadze, H. Matsutani, N. P. Misnikova, R. A. Mukhamedshin, S. Nagasawa, R. Nakano, M. Namiki, M. Nakazawa, H. NanjoS. N. Nazarov, S. Ohata, H. Ohtomo, V. I. Osedlo, D. S. Oshuev, P. A. Publichenko, I. V. Rakobolskaya, T. M. Roganova, C. Saito, G. P. Sazhina, H. Semba, T. Shibata, D. Shuto, H. Sugimoto, R. Suzuki, L. G. Sveshnikova, V. M. Taran, N. Yajima, T. Yamagami, I. V. Yashin, E. A. Zamchalova, G. T. Zatsepin, I. S. Zayarnaya

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

This is a full report on the cosmic-ray spectra and composition obtained by the emulsion chambers on board 10 long-duration balloons, launched from Kamchatka between 1995 and 1999. The total exposure of these campaigns amounts to 575 m2 hr, with an average flight altitude of ∼32 km. We present final results on the energy spectra of two light elements, protons and helium nuclei, and on those of three heavy-element groups, CNO, NeMgSi, and Fe, covering the very high energy region of 10-1000 TeV particle-1. We additionally present the secondary/primary ratio, the all-particle spectrum, and the average mass of the primary cosmic rays. We find that our proton spectrum is in good agreement with other results, but the intensity of the helium component is nearly half that obtained by JACEE and SOKOL. The slopes of the spectra of these two elements obtained from RUNJOB data are almost parallel, with values of 2.7-2.8 in the energy range of 10-500 TeV nucleon-1. RUNJOB heavy-component spectra are in agreement with the extrapolation from those at lower energies obtained by CRN (Chicago group), monotonically decreasing with energy. We have also observed secondary components, such as the LiBeB group and the sub-Fe group, and present the secondary/primary ratio in the TeV nucleon-1 region. We determine the all-particle spectrum and the average mass of the primary cosmic rays in the energy region of 20-1000 TeV particle-1. The intensity of the RUNJOB all-particle spectrum is 40%-50% less than those obtained by JACEE and SOKOL, and the RUNJOB average mass remains almost constant up to ∼1 PeV.

Original languageEnglish
JournalAstrophysical Journal
Volume628
Issue number1 II
DOIs
Publication statusPublished - 2005 Jul 20
Externally publishedYes

Fingerprint

cosmic ray
cosmic rays
energy
experiment
primary cosmic rays
helium
flight altitude
protons
light elements
heavy elements
balloons
particle
emulsions
emulsion
extrapolation
energy spectra
coverings
chambers
slopes
flight

Keywords

  • Acceleration of particles
  • Cosmic rays
  • Shock waves
  • Supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Derbina, V. A., Galkin, V. I., Hareyama, M., Hirakawa, Y., Horiuchi, Y., Ichimura, M., ... Zayarnaya, I. S. (2005). Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment. Astrophysical Journal, 628(1 II). https://doi.org/10.1086/432715

Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment. / Derbina, V. A.; Galkin, V. I.; Hareyama, M.; Hirakawa, Y.; Horiuchi, Y.; Ichimura, M.; Inoue, N.; Kamioka, Eiji; Kobayashi, T.; Kopenkin, V. V.; Kuramata, S.; Managadze, A. K.; Matsutani, H.; Misnikova, N. P.; Mukhamedshin, R. A.; Nagasawa, S.; Nakano, R.; Namiki, M.; Nakazawa, M.; Nanjo, H.; Nazarov, S. N.; Ohata, S.; Ohtomo, H.; Osedlo, V. I.; Oshuev, D. S.; Publichenko, P. A.; Rakobolskaya, I. V.; Roganova, T. M.; Saito, C.; Sazhina, G. P.; Semba, H.; Shibata, T.; Shuto, D.; Sugimoto, H.; Suzuki, R.; Sveshnikova, L. G.; Taran, V. M.; Yajima, N.; Yamagami, T.; Yashin, I. V.; Zamchalova, E. A.; Zatsepin, G. T.; Zayarnaya, I. S.

In: Astrophysical Journal, Vol. 628, No. 1 II, 20.07.2005.

Research output: Contribution to journalArticle

Derbina, VA, Galkin, VI, Hareyama, M, Hirakawa, Y, Horiuchi, Y, Ichimura, M, Inoue, N, Kamioka, E, Kobayashi, T, Kopenkin, VV, Kuramata, S, Managadze, AK, Matsutani, H, Misnikova, NP, Mukhamedshin, RA, Nagasawa, S, Nakano, R, Namiki, M, Nakazawa, M, Nanjo, H, Nazarov, SN, Ohata, S, Ohtomo, H, Osedlo, VI, Oshuev, DS, Publichenko, PA, Rakobolskaya, IV, Roganova, TM, Saito, C, Sazhina, GP, Semba, H, Shibata, T, Shuto, D, Sugimoto, H, Suzuki, R, Sveshnikova, LG, Taran, VM, Yajima, N, Yamagami, T, Yashin, IV, Zamchalova, EA, Zatsepin, GT & Zayarnaya, IS 2005, 'Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment', Astrophysical Journal, vol. 628, no. 1 II. https://doi.org/10.1086/432715
Derbina, V. A. ; Galkin, V. I. ; Hareyama, M. ; Hirakawa, Y. ; Horiuchi, Y. ; Ichimura, M. ; Inoue, N. ; Kamioka, Eiji ; Kobayashi, T. ; Kopenkin, V. V. ; Kuramata, S. ; Managadze, A. K. ; Matsutani, H. ; Misnikova, N. P. ; Mukhamedshin, R. A. ; Nagasawa, S. ; Nakano, R. ; Namiki, M. ; Nakazawa, M. ; Nanjo, H. ; Nazarov, S. N. ; Ohata, S. ; Ohtomo, H. ; Osedlo, V. I. ; Oshuev, D. S. ; Publichenko, P. A. ; Rakobolskaya, I. V. ; Roganova, T. M. ; Saito, C. ; Sazhina, G. P. ; Semba, H. ; Shibata, T. ; Shuto, D. ; Sugimoto, H. ; Suzuki, R. ; Sveshnikova, L. G. ; Taran, V. M. ; Yajima, N. ; Yamagami, T. ; Yashin, I. V. ; Zamchalova, E. A. ; Zatsepin, G. T. ; Zayarnaya, I. S. / Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment. In: Astrophysical Journal. 2005 ; Vol. 628, No. 1 II.
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abstract = "This is a full report on the cosmic-ray spectra and composition obtained by the emulsion chambers on board 10 long-duration balloons, launched from Kamchatka between 1995 and 1999. The total exposure of these campaigns amounts to 575 m2 hr, with an average flight altitude of ∼32 km. We present final results on the energy spectra of two light elements, protons and helium nuclei, and on those of three heavy-element groups, CNO, NeMgSi, and Fe, covering the very high energy region of 10-1000 TeV particle-1. We additionally present the secondary/primary ratio, the all-particle spectrum, and the average mass of the primary cosmic rays. We find that our proton spectrum is in good agreement with other results, but the intensity of the helium component is nearly half that obtained by JACEE and SOKOL. The slopes of the spectra of these two elements obtained from RUNJOB data are almost parallel, with values of 2.7-2.8 in the energy range of 10-500 TeV nucleon-1. RUNJOB heavy-component spectra are in agreement with the extrapolation from those at lower energies obtained by CRN (Chicago group), monotonically decreasing with energy. We have also observed secondary components, such as the LiBeB group and the sub-Fe group, and present the secondary/primary ratio in the TeV nucleon-1 region. We determine the all-particle spectrum and the average mass of the primary cosmic rays in the energy region of 20-1000 TeV particle-1. The intensity of the RUNJOB all-particle spectrum is 40{\%}-50{\%} less than those obtained by JACEE and SOKOL, and the RUNJOB average mass remains almost constant up to ∼1 PeV.",
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TY - JOUR

T1 - Cosmic-ray spectra and composition in the energy range of 10-1000 TeV per particle obtained by the RUNJOB experiment

AU - Derbina, V. A.

AU - Galkin, V. I.

AU - Hareyama, M.

AU - Hirakawa, Y.

AU - Horiuchi, Y.

AU - Ichimura, M.

AU - Inoue, N.

AU - Kamioka, Eiji

AU - Kobayashi, T.

AU - Kopenkin, V. V.

AU - Kuramata, S.

AU - Managadze, A. K.

AU - Matsutani, H.

AU - Misnikova, N. P.

AU - Mukhamedshin, R. A.

AU - Nagasawa, S.

AU - Nakano, R.

AU - Namiki, M.

AU - Nakazawa, M.

AU - Nanjo, H.

AU - Nazarov, S. N.

AU - Ohata, S.

AU - Ohtomo, H.

AU - Osedlo, V. I.

AU - Oshuev, D. S.

AU - Publichenko, P. A.

AU - Rakobolskaya, I. V.

AU - Roganova, T. M.

AU - Saito, C.

AU - Sazhina, G. P.

AU - Semba, H.

AU - Shibata, T.

AU - Shuto, D.

AU - Sugimoto, H.

AU - Suzuki, R.

AU - Sveshnikova, L. G.

AU - Taran, V. M.

AU - Yajima, N.

AU - Yamagami, T.

AU - Yashin, I. V.

AU - Zamchalova, E. A.

AU - Zatsepin, G. T.

AU - Zayarnaya, I. S.

PY - 2005/7/20

Y1 - 2005/7/20

N2 - This is a full report on the cosmic-ray spectra and composition obtained by the emulsion chambers on board 10 long-duration balloons, launched from Kamchatka between 1995 and 1999. The total exposure of these campaigns amounts to 575 m2 hr, with an average flight altitude of ∼32 km. We present final results on the energy spectra of two light elements, protons and helium nuclei, and on those of three heavy-element groups, CNO, NeMgSi, and Fe, covering the very high energy region of 10-1000 TeV particle-1. We additionally present the secondary/primary ratio, the all-particle spectrum, and the average mass of the primary cosmic rays. We find that our proton spectrum is in good agreement with other results, but the intensity of the helium component is nearly half that obtained by JACEE and SOKOL. The slopes of the spectra of these two elements obtained from RUNJOB data are almost parallel, with values of 2.7-2.8 in the energy range of 10-500 TeV nucleon-1. RUNJOB heavy-component spectra are in agreement with the extrapolation from those at lower energies obtained by CRN (Chicago group), monotonically decreasing with energy. We have also observed secondary components, such as the LiBeB group and the sub-Fe group, and present the secondary/primary ratio in the TeV nucleon-1 region. We determine the all-particle spectrum and the average mass of the primary cosmic rays in the energy region of 20-1000 TeV particle-1. The intensity of the RUNJOB all-particle spectrum is 40%-50% less than those obtained by JACEE and SOKOL, and the RUNJOB average mass remains almost constant up to ∼1 PeV.

AB - This is a full report on the cosmic-ray spectra and composition obtained by the emulsion chambers on board 10 long-duration balloons, launched from Kamchatka between 1995 and 1999. The total exposure of these campaigns amounts to 575 m2 hr, with an average flight altitude of ∼32 km. We present final results on the energy spectra of two light elements, protons and helium nuclei, and on those of three heavy-element groups, CNO, NeMgSi, and Fe, covering the very high energy region of 10-1000 TeV particle-1. We additionally present the secondary/primary ratio, the all-particle spectrum, and the average mass of the primary cosmic rays. We find that our proton spectrum is in good agreement with other results, but the intensity of the helium component is nearly half that obtained by JACEE and SOKOL. The slopes of the spectra of these two elements obtained from RUNJOB data are almost parallel, with values of 2.7-2.8 in the energy range of 10-500 TeV nucleon-1. RUNJOB heavy-component spectra are in agreement with the extrapolation from those at lower energies obtained by CRN (Chicago group), monotonically decreasing with energy. We have also observed secondary components, such as the LiBeB group and the sub-Fe group, and present the secondary/primary ratio in the TeV nucleon-1 region. We determine the all-particle spectrum and the average mass of the primary cosmic rays in the energy region of 20-1000 TeV particle-1. The intensity of the RUNJOB all-particle spectrum is 40%-50% less than those obtained by JACEE and SOKOL, and the RUNJOB average mass remains almost constant up to ∼1 PeV.

KW - Acceleration of particles

KW - Cosmic rays

KW - Shock waves

KW - Supernovae: general

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U2 - 10.1086/432715

DO - 10.1086/432715

M3 - Article

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VL - 628

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

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