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Determination of rain age via rays from accreted radon progeny
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10.1063/1.2990773
/content/aip/journal/jap/104/7/10.1063/1.2990773
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/7/10.1063/1.2990773

Figures

Image of FIG. 1.
FIG. 1.

Velocity vs drop size distribution.

Image of FIG. 2.
FIG. 2.

(609 keV filled circles) and (352 keV open triangles) ray count rates as a function of 2.5 min bin intervals taken on 25 April 2006, and decay curves for breaking of secular equilibrium at the beginning of fall (solid lines), at the beginning of collection (dashed lines), and at the beginning of each 2.5 min interval. The double headed arrows indicate the rain age and sample preparation time from left to right, respectively.

Image of FIG. 3.
FIG. 3.

Number of drops vs diameter (millimeter) and for rain rates of 1, 3, 5, 7, and 9 mm/h as the closed circles, triangles, diamonds, squares, and open circles, respectively.

Image of FIG. 4.
FIG. 4.

Integral surface area vs drop size (millimeter) for rain rates of 1, 3, 5, 7, and 9 mm/h as closed circles, triangles, diamonds, squares, and open circles, respectively.

Image of FIG. 5.
FIG. 5.

Integral surface area versus their velocities for rain rates of 1, 3, 5, 7, and 9 mm/h as closed circles, triangles, diamonds, squares, and open circles, respectively.

Image of FIG. 6.
FIG. 6.

Gamma ray energy spectrum for a rain sample collected on 2 May 2006.

Image of FIG. 7.
FIG. 7.

Gamma ray energy spectrum for the same rain sample, as shown in Fig. 6 4 h later.

Image of FIG. 8.
FIG. 8.

(609 keV closed circles) and (352 keV open circles) ray count rates as a function of 5.0 min bin collection intervals from rain collected on 24 May 2006, and their theoretical decay curves assuming they are in secular equilibrium at beginning of fall as dashed and solid lines, respectively.

Image of FIG. 9.
FIG. 9.

(609 keV closed circles) and (352 keV open circles) ray count rates as a function of 5.0 min bin collection intervals from a second sample of rain collected on 24 May 2006, and their theoretical decay curves assuming they are in secular equilibrium at beginning of fall as dashed and solid lines, respectively.

Image of FIG. 10.
FIG. 10.

(609 keV closed circles) and (352 keV open circles) ray count rates as a function of 5.0 min bin collection intervals for a rain sample taken on 2 May 2006, and their theoretical decay curves assuming they are in secular equilibrium at beginning of fall as dashed and solid lines, respectively.

Image of FIG. 11.
FIG. 11.

(609 keV closed circles) and (352 keV open circles) ray count rates as a function of 10.0 min bin collection intervals from a snow sample taken and subsequently melted on 21January 2006, and their theoretical decay curves assuming they are in secular equilibrium at beginning of fall as dashed and solid lines, respectively.

Image of FIG. 12.
FIG. 12.

Average drop surface velocity vs transit time for various effective (see text) cloud heights. Double headed arrow shows extent of age measurements and vertical line shows mean of age measurements.

Tables

Generic image for table
Table I.

Summary of measured rain ages and source activities.

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/content/aip/journal/jap/104/7/10.1063/1.2990773
2008-10-08
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Determination of rain age via γ rays from accreted radon progeny
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/7/10.1063/1.2990773
10.1063/1.2990773
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