Question Aradioactive source, which emits beta partides, is used as shown in Fig 12i to detect whether cartans on a canveyor belt have the required volume of pineapple juice in them

Inquiry into Physics
8th Edition
ISBN:9781337515863
Author:Ostdiek
Publisher:Ostdiek
Chapter10: Atomic Physics
Section: Chapter Questions
Problem 33Q
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A radioactive source, which emits beta-partides, is used as shown in Fig. 12.1 to detect
whether cartons on a conveyor belt have the required volume of pineapple juice in
them.
(al
State why an alpha-emitting source would not be suitable for this application.
narrow
beta garticle
aniting ce
detecting
ut ce
leel
radiation
detector
aten
AGCSE
PINEAPPLE
to counter
his wy
comeyor
Fig 121
State why a gamma-emitting source would not be suitable for this application.
The factory has a choice of two beta-emitting sources.
(e)
Source
Halt-ife
Barium-139
a5 minutes
Strontium-90
28 years
State, giving your reasons, which of these sources is the most suitable for this application.
(4)
The equipment is set to give a reading of 200 counts/s when there is a carton
with the correct amount of pineapple juice between the source and the detector.
Tick the appropriate boxes to indicate what reading would be expected in each situation.
Reading
More than 200
200 counts/s
Less than 200 counts/s
counts/s
Carton containing too
ittle juice
Carton containing too
much juice
No carton at all
Transcribed Image Text:Question A radioactive source, which emits beta-partides, is used as shown in Fig. 12.1 to detect whether cartons on a conveyor belt have the required volume of pineapple juice in them. (al State why an alpha-emitting source would not be suitable for this application. narrow beta garticle aniting ce detecting ut ce leel radiation detector aten AGCSE PINEAPPLE to counter his wy comeyor Fig 121 State why a gamma-emitting source would not be suitable for this application. The factory has a choice of two beta-emitting sources. (e) Source Halt-ife Barium-139 a5 minutes Strontium-90 28 years State, giving your reasons, which of these sources is the most suitable for this application. (4) The equipment is set to give a reading of 200 counts/s when there is a carton with the correct amount of pineapple juice between the source and the detector. Tick the appropriate boxes to indicate what reading would be expected in each situation. Reading More than 200 200 counts/s Less than 200 counts/s counts/s Carton containing too ittle juice Carton containing too much juice No carton at all
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