The unit of RBE is: Sv.kg If 8.7 m) of energy is absorbed by a tumor...
A 50 -rad dose of radiation is administered to a cancer patient (mass m-55 kg). If all this radiation is absorbed by the tumor, how much energy is absorbed? Submit Answer Tries 0/10 A 50 -rad dose of radiation is administered to a cancer patient (mass m-55 kg). If all this radiation is absorbed by the tumor, how much energy is absorbed? Submit Answer Tries 0/10
Jack underwent radiation therapy using a beam of neutrons to treat a skin cancer on his hand. He received a dose equivalent of 2.0 Sv that was absorbed in 23 gof tissue. The relative biological effectiveness (RBE) of these neutrons is 10. A. What absorbed dose of radiation did Jack receive? B. What was the total energy of the absorbed radiation? C. Suppose Jill, also being treated for skin cancer, received the same absorbed dose, but from an electron beam (beta...
9:13 PM Sun 21 Apr 51% . " 2018-2019 ACTIVITY-RADIATION PHYSICS 104 Q6:An air sample is contaminated with 150, which has a half-life of 2.03 min. One possible way to minimize its hazard is to pass it through a long pipe to allow it to decay inside the pipe until it can be safely released into the atmosphere. If the oxygen moves at a constant speed of 1.1 m/s in the pipe, how long must the pipe be for the...
Jack underwent radiation therapy using a beam of neutrons to treat a skin cancer on his hand. He received a dose equivalent of 18 mSvmSv that was absorbed in 30 gg of tissue. The relative biological effectiveness (RBE) of these neutrons is 9.0. What absorbed dose of radiation did Jack receive? What was the total energy of the absorbed radiation? Suppose Jill, also being treated for skin cancer, received the same absorbed dose, but from an electron beam (beta particles) with...
A 3.75-kg tumor is being irradiated by a radioactive source. The tumor receives an absorbed dose of 14.6 Gy in a time of 725 s. Each disintegration of the radioactive source produces a particle that enters the tumor and delivers an energy of 0.605MeV. What is the activity of the radioactive source?
A worker in a radiation lab recieves a whole-body radiation dose of 21 mrad. Her mass is 75 kg. The radiation delivered by alpha particles for which the RBE is 12. 1) What was the total energy absorbed by her body? Eabsorbed = 2) What was her equivalent absorbed dose in mREM? Doseeq= 3) As a normal employee, your allowable equivalent dose for an entire year is around 500 mREM. What percentage of of her annual dose did this employee...
A 60Co source with activity 2.5×10−4 Ci is imbedded in a tumor that has mass 0.480 kg . The source emits γ photons with average energy 1.25 MeV. Half the photons are absorbed in the tumor, and half escape. a) What energy is delivered to the tumor per second? E = 9.3×10−7 J/s b) What absorbed dose (in rad) is delivered per second? D= 1.9×10−4 rad c) What equivalent dose (in rem) is delivered per second if the RBE for these...
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 125 MeV, and the relative biological effectiveness (RBE) of this type of radiation is 16. The beam is directed onto a 0.180-kg tumor, which receives a biologically equivalent dose of 253 rem. How many nuclei are in the beam?
A 65.0-kg worker at a nuclear plant is exposed for 5.00 minutes to 1.00 mCi of beta radiation from 90Sr, each with energy of 0.546 MeV. (a) How many beta radiations does he receive? (b) If 75.0% of the radiation energy is absorbed, what is the total radiation energy (in Joule) absorbed by the worker? What is the radiation dose in gray (Gy) and rad (radiation absorbed dose)? (c) Assuming that the beta radiation has RBE of 0.95, express the...
A radioactive isotope of phosphorus, 32P, is used in internal radiotherapy to treat patients with cancers and other diseases of the bone marrow. 32P has a half-life of 14.28 days and a atomic mass of 32P is 31.973 u. Via β decay, it emits an electron with an energy of 705 KeV and a RBE of 15.5 . As part of a treatment program, a patient ingests a radioactive pharmaceutical containing 32P which has an initial activity of 1.33 MBq....