NATURAL AND FALLOUT RADIOACTIVITY IN SAN FRANCISCO BAY AREA

被引：6

作者：

WOLLENBERG, HA

PATTERSON, HW

SMITH, AR

STEPHENS, LD

机构：

[1] Lawrence Radiation Laboratory, University of California, Berkeley, CA

来源：

HEALTH PHYSICS | 1969年 / 17卷 / 02期

关键词：

D O I：

10.1097/00004032-196908000-00013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A compilation of gamma spectrometric data from soil samples collected at 27 fallout monitoring locations in the San Francisco Bay area reveals that natural terrestrial gamma-ray dose rates range from 3–13 μr/hr with a modal value of 5.5 μR/hr (a 10-yr background dose of 480 mr). There is good agreement between the natural dose rates determined by radioactivity measurements made in the field with a portable counter and those derived in the laboratory by pulse-height analyses of soil samples. Analysis of the measurements made with the portable NaI counter from March 1958 through March 1968 yields an average fallout gamma-ray integrated dose for the 27 locations of 280 mr, assuming that all fallout was deposited evenly with respect to time. Roughly three times as much gamma-emitting fallout was deposited in the San Francisco Bay area between March 1958 and the end of 1960 as has been deposited since 1960. © 1969 Health Physics Society.

引用

页码：313 / +

页数：1

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HEALTH PHYSICS, 1966, 12 (07) :935-+

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