Radon daughter plate-out onto Teflon

ENVIRONMENTAL RADON AND RADON DAUGHTER DOSIMETRY IN THE RESPIRATORY TRACT*

Health Physics ◽

10.1097/00004032-198012000-00008 ◽

1980 ◽

Vol 39 (6) ◽

pp. 929-936 ◽

Cited By ~ 6

Author(s):

R. B. McPHERSON

Keyword(s):

Respiratory Tract ◽

Radon Daughter

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Comparing Radon Daughter Dosimetric and Risk Models

Indoor Air and Human Health ◽

10.1201/9781351073479-7 ◽

2018 ◽

pp. 69-78

Author(s):

Naomi H. Harley

Keyword(s):

Risk Models ◽

Radon Daughter

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Radon daughter removal from PTFE surfaces and its application in liquid xenon detectors

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09047-2 ◽

2021 ◽

Vol 81 (4) ◽

Author(s):

S. Bruenner ◽

D. Cichon ◽

G. Eurin ◽

P. Herrero Gómez ◽

F. Jörg ◽

...

Keyword(s):

Nitric Acid ◽

Lead Isotopes ◽

Ambient Air ◽

Low Energy ◽

Small Scale ◽

Liquid Xenon ◽

Radon Daughters ◽

Radon Daughter ◽

Cleaning Procedures ◽

The Impact

AbstractLong-lived radon daughters are a critical background source in experiments searching for low-energy rare events. Originating from radon in ambient air, radioactive polonium, bismuth and lead isotopes plate-out on materials that are later employed in the experiment. In this paper, we examine cleaning procedures for their capability to remove radon daughters from PTFE surfaces, a material often used in liquid xenon TPCs. We find a large difference between the removal efficiency obtained for the decay chains of $$^{222}$$ 222 Rn and $$^{220}$$ 220 Rn. This indicates that the plate-out mechanism has an effect on the cleaning success. While the long-lived $$^{222}$$ 222 Rn daughters can be reduced by a factor of 2, the removal of $$^{220}$$ 220 Rn daughters is up to 10 times more efficient depending on the treatment. Furthermore, the impact of a nitric acid based PTFE cleaning on the liquid xenon purity is investigated in a small-scale liquid xenon TPC.

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