Perturbation of nuclear decay rates during the solar flare of 2006 December 13

被引：60

作者：

Jenkins, Jere H. ^{[1
]}

Fischbach, Ephraim ^{[1
]}

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

来源：

ASTROPARTICLE PHYSICS | 2009年 / 31卷 / 06期

关键词：

Flares; Particle emission: Sun - nuclear reactions; Neutrinos: physical processes; NEUTRINOS;

D O I：

10.1016/j.astropartphys.2009.04.005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, correlations have been reported between fluctuations in nuclear decay rates and Earth-Sun distance, which suggest that nuclear decay rates may be affected by solar activity. In this paper, we report the detection of a significant decrease in the decay of Mn-54 during the solar flare of 2006 December 13, whose X-rays were first recorded at 02:37 UT (21:37 EST on 2006 December 12). Our detector was a 1 mu Ci sample of Mn-54, whose decay rate exhibited a dip coincident in time with spikes in both the X-ray and subsequent charged particle fluxes recorded by the Geostationary Operational Environmental Satellites (GOES). A secondary peak in the X-ray and proton fluxes on December 17 at 12:40 EST was also accompanied by a coincident dip in the Mn-54 decay rate. These observations support the claim by Jenkins et al. that nuclear decay rates may vary with Earth-Sun distance. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：407 / 411

页数：5

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