Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families

M. Amenomori, E. Konishi, H. Nanjo, K. Mizutani, K. Kasahara, Shoji Torii, T. Yuda, T. Shirai, N. Tateyama, T. Taira, I. Mito, M. Shibata, H. Sugimoto, K. Taira, N. Hotta

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

An analysis of the -ray families (E100 TeV) obtained with the Mt. Fuji emulsion chambers was made focusing attention on the cluster structure of families, and the validity of scaling in the fragmentation region in the 1015-eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman x>0.1) is not broken appreciably, at least below 1015 eV, (ii) scaling in the central region (x<<0.1) seems to be broken largely at E>1015 eV; multiplicity increases proportionally to E14 or even stronger (say, E13), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60-70% of the total flux at 1015 eV and that of the protons decreases to f 10%, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within 400 MeV/c.

Original languageEnglish
Pages (from-to)2807-2819
Number of pages13
JournalPhysical Review D
Volume25
Issue number11
DOIs
Publication statusPublished - 1982
Externally publishedYes

Fingerprint

primary cosmic rays
cluster analysis
nuclear interactions
rays
fragmentation
scaling
guy wires
transverse momentum
emulsions
pions
chambers
iron
protons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Amenomori, M., Konishi, E., Nanjo, H., Mizutani, K., Kasahara, K., Torii, S., ... Hotta, N. (1982). Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families. Physical Review D, 25(11), 2807-2819. https://doi.org/10.1103/PhysRevD.25.2807

Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families. / Amenomori, M.; Konishi, E.; Nanjo, H.; Mizutani, K.; Kasahara, K.; Torii, Shoji; Yuda, T.; Shirai, T.; Tateyama, N.; Taira, T.; Mito, I.; Shibata, M.; Sugimoto, H.; Taira, K.; Hotta, N.

In: Physical Review D, Vol. 25, No. 11, 1982, p. 2807-2819.

Research output: Contribution to journalArticle

Amenomori, M, Konishi, E, Nanjo, H, Mizutani, K, Kasahara, K, Torii, S, Yuda, T, Shirai, T, Tateyama, N, Taira, T, Mito, I, Shibata, M, Sugimoto, H, Taira, K & Hotta, N 1982, 'Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families', Physical Review D, vol. 25, no. 11, pp. 2807-2819. https://doi.org/10.1103/PhysRevD.25.2807
Amenomori, M. ; Konishi, E. ; Nanjo, H. ; Mizutani, K. ; Kasahara, K. ; Torii, Shoji ; Yuda, T. ; Shirai, T. ; Tateyama, N. ; Taira, T. ; Mito, I. ; Shibata, M. ; Sugimoto, H. ; Taira, K. ; Hotta, N. / Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families. In: Physical Review D. 1982 ; Vol. 25, No. 11. pp. 2807-2819.
@article{e33d619074c34728be64c719f54da51f,
title = "Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families",
abstract = "An analysis of the -ray families (E100 TeV) obtained with the Mt. Fuji emulsion chambers was made focusing attention on the cluster structure of families, and the validity of scaling in the fragmentation region in the 1015-eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman x>0.1) is not broken appreciably, at least below 1015 eV, (ii) scaling in the central region (x<<0.1) seems to be broken largely at E>1015 eV; multiplicity increases proportionally to E14 or even stronger (say, E13), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60-70{\%} of the total flux at 1015 eV and that of the protons decreases to f 10{\%}, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within 400 MeV/c.",
author = "M. Amenomori and E. Konishi and H. Nanjo and K. Mizutani and K. Kasahara and Shoji Torii and T. Yuda and T. Shirai and N. Tateyama and T. Taira and I. Mito and M. Shibata and H. Sugimoto and K. Taira and N. Hotta",
year = "1982",
doi = "10.1103/PhysRevD.25.2807",
language = "English",
volume = "25",
pages = "2807--2819",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "11",

}

TY - JOUR

T1 - Nuclear interactions and primary cosmic-ray component around 1015 eV viewed through the cluster analysis of -ray families

AU - Amenomori, M.

AU - Konishi, E.

AU - Nanjo, H.

AU - Mizutani, K.

AU - Kasahara, K.

AU - Torii, Shoji

AU - Yuda, T.

AU - Shirai, T.

AU - Tateyama, N.

AU - Taira, T.

AU - Mito, I.

AU - Shibata, M.

AU - Sugimoto, H.

AU - Taira, K.

AU - Hotta, N.

PY - 1982

Y1 - 1982

N2 - An analysis of the -ray families (E100 TeV) obtained with the Mt. Fuji emulsion chambers was made focusing attention on the cluster structure of families, and the validity of scaling in the fragmentation region in the 1015-eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman x>0.1) is not broken appreciably, at least below 1015 eV, (ii) scaling in the central region (x<<0.1) seems to be broken largely at E>1015 eV; multiplicity increases proportionally to E14 or even stronger (say, E13), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60-70% of the total flux at 1015 eV and that of the protons decreases to f 10%, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within 400 MeV/c.

AB - An analysis of the -ray families (E100 TeV) obtained with the Mt. Fuji emulsion chambers was made focusing attention on the cluster structure of families, and the validity of scaling in the fragmentation region in the 1015-eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman x>0.1) is not broken appreciably, at least below 1015 eV, (ii) scaling in the central region (x<<0.1) seems to be broken largely at E>1015 eV; multiplicity increases proportionally to E14 or even stronger (say, E13), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60-70% of the total flux at 1015 eV and that of the protons decreases to f 10%, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within 400 MeV/c.

UR - http://www.scopus.com/inward/record.url?scp=0001529098&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001529098&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.25.2807

DO - 10.1103/PhysRevD.25.2807

M3 - Article

AN - SCOPUS:0001529098

VL - 25

SP - 2807

EP - 2819

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 11

ER -