Detected Abundances of Nuclei Relative to 26Fe for Elements 14Si through 44Ru with CALET on the International Space Station

Authors

O. Adriani, Università degli Studi di Firenze
Y. Akaike, Waseda University
K. Asano, The University of Tokyo
Y. Asaoka, The University of Tokyo
E. Berti, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
P. Betti, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
G. Bigongiari, Università degli Studi di Siena
W. R. Binns, McDonnell Center for the Space Sciences
M. Bongi, Università degli Studi di Firenze
P. Brogi, Università degli Studi di Siena
A. Bruno, NASA Goddard Space Flight Center
N. Cannady, NASA Goddard Space Flight Center
G. Castellini, Istituto Di Fisica Applicata Nello Carrara
C. Checchia, Università degli Studi di Siena
M. L. Cherry, Louisiana State University
G. Collazuol, Università degli Studi di Padova
G. A. de Nolfo, NASA Goddard Space Flight Center
K. Ebisawa, JAXA Institute of Space and Astronautical Science
A. W. Ficklin, Louisiana State University
H. Fuke, JAXA Institute of Space and Astronautical Science
S. Gonzi, Università degli Studi di Firenze
T. G. Guzik, Louisiana State University
T. Hams, College of Engineering and Information Technology
K. Hibino, Kanagawa University
M. Ichimura, Hirosaki University
M. H. Israel, McDonnell Center for the Space Sciences
K. Kasahara, Shibaura Institute of Technology
J. Kataoka, Waseda University
R. Kataoka, National Institute of Polar Research
Y. Katayose, Yokohama National University
C. Kato, Shinshu University
N. Kawanaka, Tokyo Metropolitan University
Y. Kawakubo, Aoyama Gakuin University

Document Type

Article

Publication Date

8-1-2025

Abstract

The Calorimetric Electron Telescope (CALET), launched to the International Space Station (ISS) in 2015 August and continuously operating since, measures cosmic-ray (CR) electrons, nuclei, and gamma rays. CALET, with its 27 radiation length deep Total Absorption Calorimeter, measures particle energy and allows for the measurement of spectra, secondary to primary ratios of the more abundant CR nuclei through 28Ni, while the main charge detector can measure ultra-heavy CR nuclei through 44Ru. The results for the abundances of elements from Z = 14 to Z = 44 relative to 26Fe over 7.5 yr of observation are presented here and compared to previous measurements from ACE-CRIS, SuperTIGER, and HEAO-3.

Publication Source (Journal or Book title)

Astrophysical Journal

Recommended Citation

Adriani, O., Akaike, Y., Asano, K., Asaoka, Y., Berti, E., Betti, P., Bigongiari, G., Binns, W., Bongi, M., Brogi, P., Bruno, A., Cannady, N., Castellini, G., Checchia, C., Cherry, M., Collazuol, G., de Nolfo, G., Ebisawa, K., Ficklin, A., Fuke, H., Gonzi, S., Guzik, T., Hams, T., Hibino, K., Ichimura, M., Israel, M., Kasahara, K., Kataoka, J., Kataoka, R., Katayose, Y., Kato, C., Kawanaka, N., & Kawakubo, Y. (2025). Detected Abundances of Nuclei Relative to 26Fe for Elements 14Si through 44Ru with CALET on the International Space Station. Astrophysical Journal, 988 (2) https://doi.org/10.3847/1538-4357/ade3cc