x P X X Detector array x Bin x Velocity selector E x V x x thing is going well until you turn on the apparatus for a new measurement and notice that the device that measures B has failed. Now, how are you going to know what the field in the upper on of the spectrometer is? You come up with a brilliant idea! You have a material that undergoes radioactive alpha decay (which we will study in the chapter on nuclear physics), where the ejected particle is a helium nucleus: two protons and two neutrons. In this type of decay, the mass of the daughter particle (after the decay) is less than that of the parent particle (before the decay) by hass of an alpha particle, 6.64 x 10-27 kg. You strip an electron from each parent atom and send the resulting singly charged ions into the velocity selector. While moving down the length of the ity selector, some of the parent ions will decay, leaving daughter ions with a single negative charge. Note that the parent ions have charge +e and the daughter ions have charge -e. For the nter ions, the directions of the electric and magnetic forces in the velocity selector will reverse compared to the forces for the parent ions, but the forces will remain balanced. Those ions that are eflected to the side by the emission of the alpha particles will continue along the velocity selector. Both types of ions will enter the magnetic field of magnitude Bo. At that point, because of their site charges, the parent and daughter ions will deflect in opposite directions. The velocity selector has fields with magnitudes E = 2.30 x 10³ V/m and B = 0.0340 T. You measure the values for the for the circular paths of the parent and daughter, and come up with two values: r₁ = 0.205 m and r₂ = 0.265 m. From these measurements, determine the value of Bo (in T).
x P X X Detector array x Bin x Velocity selector E x V x x thing is going well until you turn on the apparatus for a new measurement and notice that the device that measures B has failed. Now, how are you going to know what the field in the upper on of the spectrometer is? You come up with a brilliant idea! You have a material that undergoes radioactive alpha decay (which we will study in the chapter on nuclear physics), where the ejected particle is a helium nucleus: two protons and two neutrons. In this type of decay, the mass of the daughter particle (after the decay) is less than that of the parent particle (before the decay) by hass of an alpha particle, 6.64 x 10-27 kg. You strip an electron from each parent atom and send the resulting singly charged ions into the velocity selector. While moving down the length of the ity selector, some of the parent ions will decay, leaving daughter ions with a single negative charge. Note that the parent ions have charge +e and the daughter ions have charge -e. For the nter ions, the directions of the electric and magnetic forces in the velocity selector will reverse compared to the forces for the parent ions, but the forces will remain balanced. Those ions that are eflected to the side by the emission of the alpha particles will continue along the velocity selector. Both types of ions will enter the magnetic field of magnitude Bo. At that point, because of their site charges, the parent and daughter ions will deflect in opposite directions. The velocity selector has fields with magnitudes E = 2.30 x 10³ V/m and B = 0.0340 T. You measure the values for the for the circular paths of the parent and daughter, and come up with two values: r₁ = 0.205 m and r₂ = 0.265 m. From these measurements, determine the value of Bo (in T).
Chapter11: Magnetic Forces And Fields
Section: Chapter Questions
Problem 55P: The magnetic field in a cyclotron is 1.25 T, and the maximum orbital radius of the circulating...
Related questions
Question
Transcribed Image Text:You are working in a mass spectrometer laboratory, performing measurements with a Bainbridge mass spectrometer, as diagrammed in the figure below.
P
x x
Detector
array
Velocity selector
Bo. in
x
x
X
xx
x
x
x
x
x
E
xx
Xx
7
X x
x
x
X
x
x
x
Everything is going well until you turn on the apparatus for a new measurement and notice that the device that measures Bo has failed. Now, how are you going to know what the field in the upper
portion of the spectrometer is? You come up with a brilliant idea! You have material that undergoes radioactive alpha decay (which we will study in the chapter on nuclear physics), where the ejected
alpha particle is a helium nucleus: two protons and two neutrons. In this type of decay, the mass of the daughter particle (after the decay) is less than that of the parent particle (before the decay) by
the mass of an alpha particle, 6.64 x 10-27 kg. You strip an electron from each parent atom and send the resulting singly charged ions into the velocity selector. While moving down the length of the
velocity selector, some of the parent ions will decay, leaving daughter ions with a single negative charge. Note that the parent ions have charge +e and the daughter ions have charge -e. For the
daughter ions, the directions of the electric and magnetic forces in the velocity selector will reverse compared to the forces for the parent ions, but the forces will remain balanced. Those ions that are
not deflected to the side by the emission of the alpha particles will continue along the velocity selector. Both types of ions will enter the magnetic field of magnitude Bo. At that point, because of their
opposite charges, the parent and daughter ions will deflect in opposite directions. The velocity selector has fields with magnitudes E = 2.30 x 10³ V/m and B = 0.0340 T. You measure the values for the
radii r for the circular paths of the parent and daughter, and come up with two values: r₁=0.205 m and r₂ = 0.265 m. From these measurements, determine the value of Bo (in T).
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Recommended textbooks for you
Glencoe Physics: Principles and Problems, Student…
Physics
ISBN:
9780078807213
Author:
Paul W. Zitzewitz
Publisher:
Glencoe/McGraw-Hill
Glencoe Physics: Principles and Problems, Student…
Physics
ISBN:
9780078807213
Author:
Paul W. Zitzewitz
Publisher:
Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:
9781133104261
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning