Application of the Monazite Radiation Source to the Petri Dish-Type Cloud Chamber and the Influence of Several Factors on Occurrence of Tracks

Monazite radiation source (2.5mmΦ) proved to be useful as a radiation source of cloud chamber without the dispersion of powder or its adhesion because of a sintered body. After the track appeared within one minute after having put the petri dish on the dry ice, the number increased rapidly followed...

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Published inRADIOISOTOPES Vol. 61; no. 6; pp. 297 - 305
Main Authors HAYAKAWA, Issei, SAGO, Yutaka, MORI, Chizuo
Format Journal Article
LanguageJapanese
English
Published Japan Radioisotope Association 2012
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Abstract Monazite radiation source (2.5mmΦ) proved to be useful as a radiation source of cloud chamber without the dispersion of powder or its adhesion because of a sintered body. After the track appeared within one minute after having put the petri dish on the dry ice, the number increased rapidly followed by the tendency to decrease gradually after that. The tracks can be observed for about 20 minutes after cooled with dry ice. The size of dry ice should be chosen to enter the inside of the bottom edge of the petri dish. The same number of tracks as using conventional mantle radiation source was obtained by utilizing 3 pieces of monazite sintered body separated mutually by about 7.5mm. Hence the petri dish-type cloud chamber with the monazite sintered body as radiation source revealed to make the observation of track easy and prompt.
AbstractList Monazite radiation source (2.5mmΦ) proved to be useful as a radiation source of cloud chamber without the dispersion of powder or its adhesion because of a sintered body. After the track appeared within one minute after having put the petri dish on the dry ice, the number increased rapidly followed by the tendency to decrease gradually after that. The tracks can be observed for about 20 minutes after cooled with dry ice. The size of dry ice should be chosen to enter the inside of the bottom edge of the petri dish. The same number of tracks as using conventional mantle radiation source was obtained by utilizing 3 pieces of monazite sintered body separated mutually by about 7.5mm. Hence the petri dish-type cloud chamber with the monazite sintered body as radiation source revealed to make the observation of track easy and prompt.
Monazite radiation source (2.5mm[Phi]) proved to be useful as a radiation source of cloud chamber without the dispersion of powder or its adhesion because of a sintered body. After the track appeared within one minute after having put the petri dish on the dry ice, the number increased rapidly followed by the tendency to decrease gradually after that. The tracks can be observed for about 20 minutes after cooled with dry ice. The size of dry ice should be chosen to enter the inside of the bottom edge of the petri dish. The same number of tracks as using conventional mantle radiation source was obtained by utilizing 3 pieces of monazite sintered body separated mutually by about 7.5mm. Hence the petri dish-type cloud chamber with the monazite sintered body as radiation source revealed to make the observation of track easy and prompt.
Author SAGO, Yutaka
HAYAKAWA, Issei
MORI, Chizuo
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Snippet Monazite radiation source (2.5mmΦ) proved to be useful as a radiation source of cloud chamber without the dispersion of powder or its adhesion because of a...
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SubjectTerms cloud chamber
Cloud chambers
dry ice
monazite
petri dish
Radiation
radiation source
track
Title Application of the Monazite Radiation Source to the Petri Dish-Type Cloud Chamber and the Influence of Several Factors on Occurrence of Tracks
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