Exam 32: Nuclear Physics and Nuclear Radiation

Bismuth Bi is known to be radioactive.The stability of Bi with respect to alpha,beta-plus and beta-minus decay is to be determined.The following atomic masses are known: He: 4.002603 u Tl: 207.981998 u Pb: 211.991871 u Bi: 211.991255 u Po: 211.988842 u The Bi nucleus is

A 70-kg researcher absorbs 4.5 × Neutrons in a work day,each of energy 1.2 MeV.The relative biological effectiveness (RBE)for these neutrons is 10.What is the equivalent dosage of the radiation exposure for this researcher,in millirem?

The stability of C with respect to alpha,beta-plus and beta-minus decay is to be determined.The following atomic masses are known: He: 4.002603 u Be: 7.016928 u B: 11.009305 u C: 11.011433 u N: 11.026742 u The C nucleus is

A nuclear explosion results in a mass decrease of 2.10g. How much energy is released during this explosion? (c = 3.00 × 10⁸ m/s)

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

A certain substance has a half-life of 5.0 hours.How many nuclei of the substance are required to give an initial activity of 6.0 μCi? (1 Ci = 3.7 × Bq)

What is true of an element of atomic number 15 that has an isotope of mass number 32? (There could be more than one correct choice. )

The nuclei of He are also known as

What mass of ¹⁴C,with a half-life of 5730 y,do you need to provide a decay rate of The mass of ¹⁴C is 14.00 u,and 1 u = 1.6605 × 10^-27 kg.

The radioactivity due to carbon-14 measured in a piece of a wooden casket from an ancient burial site is found to produce 20 counts per minute from a given sample,whereas the same amount of carbon from a piece of living wood produces 160 counts per minute.The half-life of carbon-14,a beta-minus emitter,is 5730 years.What would we calculate for the age of the artifact,assuming that the activity for living wood has remained constant over time?

The symbol for a certain isotope of polonium is Po.How many neutrons are there in the nucleus of this isotope?

An archaeologist finds the ¹⁴C in a sample of Of material to be decaying at 107 Bq.A modern Sample of the same material decays at 151 Bq,and assume this rate has also held in the past.The half-life of ¹⁴C is 5730 years.How old is the sample?

Radium-226 decays into radon-222 plus an alpha particle.The relevant masses are He: 4.002603 u Rn: 222.017570 u Ra: 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c²)

The maximum permissible workday dose for occupational exposure to radiation is 18 mrem.A 54-kg laboratory technician absorbs 2.6 mJ of 0.30-MeV gamma rays in a work day.The relative biological effectiveness (RBE)for gamma rays is 1.00.What is the ratio of the equivalent dosage received by the technician to the maximum permissible equivalent dosage?

Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?

A hospital patient has been given a sample of ¹³¹I ,which has a half-life of 8.04 days.This sample is decaying at 5.9 times the acceptable level for exposure to the general public.How long must the patient wait for the decay rate of the sample to reach the acceptable level?

What is the mass number of alpha particles?

In β^- decay,the number of protons in the nucleus is

An yttrium isotope has 39 protons and 50 neutrons in its nucleus.Which one of the following symbols accurately represents this isotope?

A gamma ray is also known as