Singly-ionized neon atoms are accelerated from rest by a voltage, VÅ, before entering the steering region of a mass spectrometer. The ions follow a semi-circular path through the uniform magnetic field, B, in the steering region then enter the detector as shown. (a) What is the charge on the Ne ions? O +e O-e The mass spectrometer is being used to count and compare the number of Ne-20 ions, which have an atomic mass of 20 u, to the number of Ne-22 ions, which have an atomic mass of 22 u. +|+ cm VA B (b) The detector needs to be a distance, d = 69.8 cm, from the entrance aperture to collect the Ne-20 ions. Where then does it need to be to collect the Ne-22 ions? d = Steering Region •d • entrance aperture ion source detector aperture
Singly-ionized neon atoms are accelerated from rest by a voltage, VÅ, before entering the steering region of a mass spectrometer. The ions follow a semi-circular path through the uniform magnetic field, B, in the steering region then enter the detector as shown. (a) What is the charge on the Ne ions? O +e O-e The mass spectrometer is being used to count and compare the number of Ne-20 ions, which have an atomic mass of 20 u, to the number of Ne-22 ions, which have an atomic mass of 22 u. +|+ cm VA B (b) The detector needs to be a distance, d = 69.8 cm, from the entrance aperture to collect the Ne-20 ions. Where then does it need to be to collect the Ne-22 ions? d = Steering Region •d • entrance aperture ion source detector aperture
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Transcribed Image Text:Singly-ionized neon atoms are accelerated from rest by a voltage,
VA, before entering the steering region of a mass spectrometer.
The ions follow a semi-circular path through the uniform magnetic
field, B, in the steering region then enter the detector as shown.
(a) What is the charge on the Ne ions?
O +e
O -e
The mass spectrometer is being used to count and compare the
number of Ne-20 ions, which have an atomic mass of 20 u, to the
number of Ne-22 ions, which have an atomic mass of 22 u.
B
cm
(b) The detector needs to be a distance, d = 69.8 cm, from the entrance aperture to
collect the Ne-20 ions. Where then does it need to be to collect the Ne-22 ions?
d =
Steering Region
•d •
entrance
aperture
ion source
detector
aperture
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