A radiation detector records 8700 counts in 1.00 min. Assuming that the detector records all decays, what is the activity of the radiation source in (a) becquerels and (b) curies?

Q: A 75 kg patient swallows a 30 μCi beta emitter with a halflife of 5.0 days, and the radioactive…

A: The number of radioactive nuclei did the patient swallowed be calculated as,…

Q: An accident in a laboratory results in a room being contaminated by a radioisotope with a half-life…

A: Half life radioisotope =t= 8days . Let maximum permissible level be = N⁰ then , radiation emissions…

Q: The activity of this sample after 3  half-lives have elapsed is approximately what?

A:

Q: If the average energy released in a fission event is 208 MeV, find the total number of fission…

A: Write the expression for energy.

Q: Cow’s milk produced near nuclear reactors can be tested for as little as 1.00 pCi of 131 I per…

A:

Q: The tissues of mass m 100 mg have adsorbed N= 1020 alfa-particles each of them having energy E = 3…

A:

Q: The tissues of mass m = 100 mg have adsorbed N = 1020 alfa-particles each of them having energy E =…

A:

Q: Time taken by a radioạctive nuclei hauing a half life of T years, to reduce to 3.125% of its…

A:

Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 6.94 x 106 Bq. (a) What…

A:

Q: A gamma scan showing the active volume of a patient’s lungs can be created by having a patient…

A: Given: The dose is 3.0 mSv. The mass of lung is 1.2 kg.

Q: From the equation expressing the law of radioactive decay, derive the following useful expressions…

A: Given: The time interval is Δt. Initially the number of atoms is R. After time Δt the number of…

Q: Find the radius of a nucleus of (a) 24He and (b) 23892U.

A: a)Radius of the nucleus is given by

Q: What size disinfection chamber will be needed to achieve a 3 log disinfection of viruses, using…

A: 3 log reduction means 99.9% reduction of bacteria. Let the initial bacteria present be x. After 3…

Q: A beam of 168-MeV nitrogen nuclei is used for cancertherapy. If this beam is directed onto a…

A: The equation for the number of nitrogen nuclei that were stopped is given by,

Q: Two sources of delayed neutrons in 235U fission are the fission fragments 7Br and 1371. Find the…

A: In this question we are given that two sources of delayed neutrons in 235U fission are the fission…

Q: If the parent nucleus in a ß- decay is He, what is the daughter nucleus? chemPad O Help Greek If the…

A:

Q: In a nuclear medicine scan with 99mTc (t/2 = 6hrs), the signal-to-noise ratio Image size for a 30…

A: Given, Scan of 99mTC Initial Dose, Di=1 mCi Value of SNR = 50:1 Initial time, ti=30 min Final Dose,…

Q: Suppose that the electric average power consumption, day and night, in a typical house is 880 W.…

A: Given Average Power consumption per day=880 W200 meV is released per fission 100 % efficiencyTo…

Q: Characteristic nuclear time is a useful but loosely defined quantity, taken to be the time required…

A:

Q: What is the dose in mSv for: (a) a 0.1 Gy x-ray?(b) 2.5 mGy of neutron exposure to the eye? (c) 1.5…

A: The dose in Sv is given by, a) The energy radiation for X-ray is 1RBE. Thus,

Q: A nuclear chemist receives an accidental radiation dose of 5.0 Gy from slow neutrons 1RBE = 4.02.…

A: To find: To find the dose in terms of rad, rem, and J/kg using the given units.

Q: What initial mass of 235 over 92 U is required to operate a 950-MWMW reactor for 1 yryr? Assume that…

A: Nuclear fission is a process where a large nucleus breaks down into lighter nuclei and releases…

Q: If everyone in Australia received an extra 0.05 mSv peryear of radiation, what would be the increase…

A: The increase in the number of cancer deaths per year is given by the expression,

Q: Estimate the number of 235U fissions per second that must occur in a 1000MW power plant, assuming a…

A: Let n and P­ denote the power plant’s efficiency and energy output, respectively. Evaluate the total…

Q: Assume one-fourth of the yield of a typical 320-kTstrategic bomb comes from fission reactions…

A: The energy,

Q: A large power reactor that has been in operation for somemonths is turned off, but residual activity…

A:

Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 3.47 ✕ 106 Bq.   (a)What…

A:

Q: one of the fusion reactions that tunes picice as astur ages 34 He 12C is calbd the triplecalpha…

A: Given quantities: Atomic mass of He = 4.00260 u Atomic mass of carbon = 12.00000 u   It is known…

Q: The radionuclide 49Sc has a half-life of 57.0 min.At t=0, the counting rate of a sample of it is…

A: The counting rate of a 49Sc with a half-life time of 57 min will be,

Q: A 60 Co source is labeled 4.00 mCi, but its present activity is found to be 1.85×107 Bq. (a) What is…

A: Given ,60 Co source is labeled 4.00 mCi present activity N = 1.85×107 Bq. 1 mCi = 3.7 x 107 Bq…

Q: Naturally occurring 40K is listed as responsible for 16mrem/y of background radiation. Calculate the…

A: The background radiation, The mass of woman,

Q: If the average energy released in a fission event is 208 MeV, find the total number of fission…

A:

Q: An average adult body contains about 0.10 pCi of K, which comes from food. (a) How many decays occur…

A:

Q: (a) The 210 Po source used in a physics laboratory is labeled as having an activity of 1.0 µCi on…

A: Given,

Q: Cow's milk produced near nuclear reactors can be tested for as little as 1.00 pCi of  I per liter,…

A: N is the number of atoms. Activity of isotope is given by R = 0.693 Nt1/2 (given) R = 1.00 pCi     =…

Q: The electrical power output of a large nuclear reactorfacility is 900 MW. It has a 35.0% efficiency…

A: The relation of electrical output is Substitute the values and solve for the input power. The…

Q: An organic sample of mass 4.00 kg absorbs 2.00 mJ via slow neutron radiation (RBE=5).What is the…

A: The expression for the dose equivalent is,

Q: Confirm that each of the reactions listed for plutoniumbreeding just followingenergy produced by the…

A: The reactions occurring in plutonium breeding are Consider the first step.

Q: A proposed nuclear reactor facility will have an electrical power output of 908 MW with a 31.3%…

A: efficiency=output powerinput power=electrical powernuclear power Here electrical power=908 MW &…

Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 1.73 ✕ 106 Bq. A.) What…

A:

Q: If the average energy released in a fission event is 208 MeV, find the total number of fission…

A: Given that                       The average energy released in a fission event is(E) = 208 Mev…

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.