Early 18th century cosmic ray flux inferred from 44Ti in Agen meteorite

被引：0

作者：

C. Taricco

N. Sinha

N. Bhandari

P. Colombetti

S. Mancuso

S. Rubinetti

D. Barghini

机构：

[1] Università di Torino,Dipartimento di Fisica

[2] Osservatorio Astrofisico di Torino,Istituto Nazionale di Astrofisica

[3] Wentworth Institute of Technology,Physical Research Laboratory

[4] Basic Sciences Research Institute,undefined

来源：

Astrophysics and Space Science | 2016年 / 361卷

关键词：

Meteorites; Cosmogenic radionuclides; Solar activity—methods: gamma-ray spectrometry;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We report the measurement of radioactivity of cosmogenic 44Ti in Agen meteorite, a H5 chondrite that fell in 1814. The 44Ti activity in meteorites is related to centennial-scale changes in cosmic ray intensity caused by heliospheric magnetic field modulation in the interplanetary space between heliocentric distances of 1 and 3 AU. The measured low 44Ti activity in Agen suggests a strong modulation of galactic cosmic rays at the turn of the 18th century, resulting in a low cosmic ray flux and is consistent with the linearly decreasing trend of GCR flux, modulated by the Gleissberg solar cycle during the past 250 years, as previously suggested by us.

引用

共 50 条

[1] Early 18th century cosmic ray flux inferred from 44Ti in Agen meteorite
Taricco, C.
Sinha, N.
Bhandari, N.
Colombetti, P.
Mancuso, S.
Rubinetti, S.
Barghini, D.
ASTROPHYSICS AND SPACE SCIENCE, 2016, 361 (10)
[2] Mid 19th century minimum of galactic cosmic ray flux inferred from 44Ti in Allegan meteorite
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Bhandari, N.
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[3] Cosmic ray flux variation during mid-19th century revealed by low 44Ti activity in Allegan meteorite
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[4] Meteoritic 44Ti evidence for decrease in cosmic ray flux during the past two hundred years
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