CN-柯达胶卷中反常宇宙射线碳和氧的径迹。

Anomalous cosmic ray carbon and oxygen tracks in CN-Kodak.

作者信息

Kondratyeva M A, Tretyakova C A, Tretyakova S P, Zhuravlev D A

机构信息

Moscow State University, Skobeltsyn Institute for Nuclear Physics, 119899 Moscow, Russia.

出版信息

Radiat Meas. 2001 Jun;34(1-6):293-5. doi: 10.1016/s1350-4487(01)00170-6.

DOI:10.1016/s1350-4487(01)00170-6

PMID:11678155

Abstract

For observation of low energy cosmic ray particles we used CN-Kodak nuclear track detectors on Cosmos satellites. In solar quiet periods during solar minima conditions the detectors registered anomalous cosmic rays (ACRs). The ACRs are characterized by flux enhancements of several elements and it is known that the carbon enhancement is small compared with that of oxygen. In all of our quiet-time exposures the relation between carbon and oxygen was extremely small (C/O ~ 0.03). But in two quiet-time periods of 14.03.96-11.06.96 and of 15.12.97-14.04.98 we have identified many tracks as carbon in a L-R diagram. As a result the observed C/O ratio appears to be more than 0.5, whereas other experiments show no evidence of enhanced flux of carbon during these periods. The reason for the unexpected response of CN-Kodak is discussed.

摘要

为了观测低能宇宙射线粒子，我们在宇宙卫星上使用了柯达CN核径迹探测器。在太阳活动极小期的太阳平静时期，探测器记录到了反常宇宙射线（ACR）。ACR的特征是几种元素的通量增强，并且已知碳的增强与氧相比很小。在我们所有的平静期曝光中，碳和氧之间的关系极小（C/O约为0.03）。但是在1996年3月14日至1996年6月11日以及1997年12月15日至1998年4月14日这两个平静期内，我们在左-右（L-R）图中识别出许多径迹为碳。结果，观测到的C/O比似乎超过0.5，而其他实验在这些时期没有显示出碳通量增强的证据。本文讨论了柯达CN探测器出现意外响应的原因。