In proton beam therapy, a beam of high-energy protons is used to kill cancerous cells in...

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Physics

In proton beam therapy, a beam of high-energy protons is used tokill cancerous cells in a tumor. In one system, the beam, whichconsists of protons with an energy of 2.8Ã—10âˆ’11J, has a current of72 nA. The protons in the beam mostly come to rest within thetumor. The radiologist has ordered a total dose corresponding to3.8Ã—10âˆ’3J of energy to be deposited in the tumor.
Part A How many protons strike the tumor each second? Expressyour answer as a number of protons.
Part B: How long should the beam be on in order to deliver therequired dose?

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3.9 Ratings (523 Votes)

Let the charge of one proton is e 1602 1019 C Let the energy of each proton is E 28 1011 J Total current in the proton beam is I 72 nA 72 n Cs 72 109 Cs So we can observe that a See Answer

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