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As shown in figure 1, a beam of particles is fired at a stationary target. The resulting nuclei from this collision are highly unstable, and decay almost immediatebly into more stable daughter nuclei. During this decay, charged particles are emitted, which curve in the magnetic field within the detector (in this case, the field is pointing out of the page). Each of these decay particles are collected by the detector and their energies are measured, producing the graph shown in figure 2. What type of decay are the unstable nuclei undergoing?
A) α decay
B) β- decay
C) β+ decay
D) γ decay

A radioactive sample has an activity of 1.5x10 8 Bq when it has 2.7x1014 nuclei. What is the half life of this radioactive sample?

After the Chernobyl meltdown in Ukraine in 1986, some 2,000 km 2 of Belarus was covered in cesium-137 with an activity of about 1500 Bq/m2. Cesium-137 decays with a half life of about 30.17 years into Barium-137, which is stable. In 2006, when local physicists collected samples of soil in this part of Belarus to test for radiactivity, what activity of cesium-137 would they measure?

Cesium-137 undergoes β- decay, decaying into barium-137. Measurements of the emitted electrons show that the maximum electron energy is 1.176 MeV. If in some β- decay of cesium-137, the emitted electron has a kinetic energy of 0.284 MeV, what is the energy of the emitted neutrino? Consider the mass of cesium-137 to be 127.528 GeV/c2, the mass of barium-137 to be 127.527 GeV/c2, the mass of the electron to be 0.511 MeV/c2, and the neutrino to be massless.

A radioactive nucleus, X1, decays into a second radioactive nucleus, X 2. The halflife of X1 is 30.4 min, and the halflife of X 2 is 2.5 min. If a radioactive sample begins with 5 g of X 1 and 10 g of X2, how many grams of X 2 will there be after 5 minutes?

Estimate the binding energy of the nucleus 94Be, given the mass of the nucleus is 9.012182 u, the mass of a proton is 1.007276 u, and the mass of a neutron is 1.008665 u. Note that 1 u approximately equal to 9.315x108 eV/c2.

A 2.3 mol sample of radioactive nuclie has a half life of 34.2 days. How long will it take to decrease the mass of this sample by 30%?

A sample of radioactive nuclei has a decay constant of 0.15 1/days. How long will it take mass of this sample to drop by 50%?

U-235 decays in the following series of steps: alpha decay, beta decay, alpha decay, beta decay, alpha decay, alpha decay, alpha decay, alpha decay, beta decay, alpha decay, beta decay. After these 11 decays, the final daughter nuclei are stable. What is the final daughter nucleus? A periodic table has been attached to this problem to help.

What daughter nucleus is produced in each of the following decays?
(a) α decay of 23994Pu
(b) β- decay of 2111Na
(c) β+ decay of 158O

The nucleus 198O undergoes β- decay. How many neutrons are there in the nucleus that is produced by this decay?

The nucleus 23092U undergoes α-decay with a half-life of 20.8 days. How many alpha particles are emitted per second by a sample that contains 8.0 g of 23092U?

Consider the nuclear fusion reaction 31H + 21H → 42He + 10n. The atomic masses involved are as follows:
M(42He) = 4.0026 u M( 31H) = 3.0160 u
M(21H) = 2.0141 u M( 10n) = 1.0087 u
How many reactions per second must take place in order to generate 6.0 MW of power? (recall: 1 W = 1 J/s)

The atomic mass of a neutral 178O atom is 16.999132 u. Calculate the binding energy of the 178O nucleus, given the mass of a proton is 1.007276 u, and the mass of a neutron is 1.008665 u. Note that 1 u approximately equal to 9.315x108 eV/c2. Express your result in MeV.

A portion of Table 30.2 Atomic Masses of Light Elements from the textbook is reproduced below. Use the information in the table to calculate the total binding energy of the nucleus 42He.

The nucleus 4720Ca is a B- emitter with a half-life of 4.5 days. How many neutrons are in the daughter nucleus that is produced by this decay?

The nucleus 4720Ca is a B- emitter with a half-life of 4.5 days. If a sample contains 8.0 g of this isotope, how many B- particles will be emitted per second by the sample?

The gold nucleus 19879Au undergoes α-decay with a half-life of 2.70 days. How many neutrons are there in the daughter nucleus that is produced by this decay?

The gold nucleus 19879Au undergoes α-decay with a half-life of 2.70 days. What is the activity in Bq (decays/sec) of a sample that contains 5.0 grams of 19879Au nuclei?

The mass of a neutral 21H atom is 2.014101 u. Calculate the binding energy of the 21H nucleus in MeV.

The nucleus 3010Ne has a mass of 30.0192 u. (This is the mass of the nucleus, not the mass of the neutral atom.) What is its binding energy?

The nucleus 22Na undergoes B+ decay with a half life of 2.6 years (note: 1 year = 3.2 x 107 seconds). You start out with a sample of 22Na with an activity of 3.0 x 10 4 Bq. What is the number of 22Na atoms in your initial sample?

The nucleus 22Na undergoes B+ decay with a half life of 2.6 years (note: 1 year = 3.2 x 107 seconds). You start out with a sample of 22Na with an activity of 3.0 x 10 4 Bq. After two half lives (5.2 years), what is the activity of your sample?Ans. |ΔN/Δt| = ?

Consider the nuclear fusion reaction 31H + 21H → 42He + 10n. The atomic masses involved are as follows:M(42He) = 4.0026 u M( 31H) = 3.0160 uM(21H) = 2.0141 u M( 10n) = 1.0087 uWhat is the Q-value of the reaction?

1. Give the nuclear symbol, including superscript and subscript, for each of the following.• Alpha particle• Beta particle• Gamma ray2. Which type of radiation has a negative charge?A. alphaB. betaC. gamma3. Which type of radiation is pure energy?A. alphaB. betaC. gamma4. Which type of radiation has the most massive particles?A. alphaB. betaC. gamma

In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being used to distinguish 12 C+ and 14 C+ ions that have the same charge. The 12 C+ ions move in a circle of diameter 25 cm.a. What is the diameter of the orbit of 14C+ ions?b. What is the ratio of the frequencies of revolution for the two types of ions?

Part AAssume that an average city uses about 8.5x 1013 J of energy in a day.A typical nuclear power plant converts 0.01% of the mass of its fuel into energy through nuclear reactions. How much fuel would be needed to power an average city for one day?Express the mass of fuel needed in kilograms to two significant figures.Part BA fission-based nuclear bomb (such as those used in World WarII) uses the same nuclear reactions and an amount of fuel similar to what you calculated in Part A. However, by allowing an uncontrolled chain reaction to occur, all of the bomb's energy can be released in about 1.0 x 10-6s.What is the average power Pavg of such a nuclear bomb?

In each of the parts of this question, a nucleus undergoes a nuclear decay. Determine the resulting nucleus in each case.Part A22789 Ac undergoes alpha decay. Determine the resulting nucleus.Part B21183 Bi undergoes beta-minus decay. Determine the resulting nucleus.

It has been found that the radii of most nuclei are well approximated by the equation R=R0A1/3, where R0=1.2x10-15 m is an experimentally determined constant. Because the mass of a nucleon (a proton or a neutron) is close to one atomic mass unit (1u), the nucleon number A is sometimes called the mass number.Part AWhat is the approximate radius R of 20882Pb?Express your answer in meters to two significant figures.R = ____ mPart BAssuming that each nucleus is roughly spherical and that its mass is roughly equal to A (in atomic mass units u), what is the density ρ of a nucleus with nucleon number A?Express your answer in terms of A, R0, and π.

To understand the notation and basic quantities involved in nuclear physics.Nuclear physics borrows the symbols for elements from chemistry. However, knowing which element we are dealing with only tells us one of the numbers important to nuclear physics. When referring to a specific nucleus, we use the following notation:5626Fe.The superscript, 56 in this case, denotes the total number of nucleons (protons and neutrons) in the nucleus. This is called the nucleon number and is given the symbol A. The subscript, 26 in this case, is the number of protons in the nucleus. This is called the atomic number and is given the symbol Z. An atom's atomic number determines which element the atom is, in this case Fe (iron). Another important number characterizing an atom is the neutron number N. Since A is the total number of nucleons in the nucleus, the neutron number may be found from the equation A=Z+N. Solving for N gives N=A - Z. Nuclei with the same atomic number but different neutron numbers are called isotopes. Isotopes are often written in a form such as "iron-56."Part AWhat is the atomic number Z of 73Li? Express your answer as an integer. (protons).Part BWhat is the nucleon A number of carbon-14? Express your answer as an integer. (Nucleons).Part CWhat is the neutron number N of 5626Fe?Express your answer as an integer.

A. Calculate (in MeV) the binding energy per nucleon for 12C.B. Calculate (in MeV) the binding energy per nucleon for 13C.C. Which is more tightly bound?

The nuclear mass of 32S is 31.9633 amu. Calculate the binding energy per nucleon for 32S.

When a nucleus of 235U undergoes fission, it breaks into two smaller, more tightly bound fragments.1) Calculate the binding energy per nucleon for 235U? 2) Calculate the binding energy per nucleon for the fission product 137Cs?

Calculate the binding energy per nucleon for 4He___________MeV/nucleon

Calculate the binding energy per nucleon for 59Co__________ MeV/nucleon

Calculate the binding energy per nucleon for 238U___________MeV/nucleon

Calculate the binding energy per nucleon for each of the following nuclei. 9Be___________MeV/nucleon

Which of these subshell designations are possible which are impossible?A. 2p, 1f, 3sB. 1d and 1p

Which of the following quantities are conserved during radioactive decay?Select all that apply.a) electric chargeb) energyc) massd) angular momentume) linear momentumf) nucleon number

For this question consider the figure to the right shows an energy level diagram for a certain atom (not hydrogen). Several transitions are shown and are labeled by letters. a.) Which transition corresponds to the absorption of the photon with the longest wavelength? b.) Which transition corresponds to the absorption of the photon with the shortest wavelength?

For this question consider the figure to the right shows an energy level diagram for a certain atom (not hydrogen). Several transitions are shown and are labeled by letters.a.) Which transition corresponds to the absorption of a 413 nm photon? b.) Which transition corresponds to the emission of a 248 nm photon?

Which of the following choices lists a pair of isotopes?A. 146C and 147NB. 32He and 63LiC. 157N and 168OD. 31H and 21H

The amount of meat in prehistoric diets can be determined by measuring the ratio of the isotopes nitrogen-15 to nitrogen-14 in bone from human remains. Carnivores concentrate 15N, so this ratio tells archaeologists how much meat was consumed by ancient people. Suppose you use a velocity selector (Figure 1) to obtain singly ionized (missing one electron) atoms of speed 513 km/s and want to bend them within a uniform magnetic field of 0.510 T. The measured masses of these isotopes are 2.35×10-26 kg (14N) and 2.45×10-26 kg (15N).Find the separation of the 14N and 15N isotopes at the detector.Express your answer with the appropriate units.s = ___

What is the Q value for the reaction 9Be + α → 12C + n?a. 5.7 MeV b. 8.4 MeV c. 4.2 MeV d. 7.3 MeV e. 6.2 MeV

Nuclear reactors generate power by harnessing the energy from nuclear fission. In a fission reaction, uranium-235 absorbs a neutron, bringing it into a highly unstable state as uranium-236. This state almost immediately breaks apart into two smaller fragments, releasing energy. One typical reaction is 235 92U+10n→ 140 54Xe+9438Sr+210n, where 10n indicates a neutron. In this problem, assume that all fission reactions are of this kind. In fact, many different fission reactions go on inside a reactor, but all have similar reaction energies, so it is reasonable to calculate with just one. The products of this reaction are unstable and decay shortly after fission, releasing more energy. In this problem, you will ignore the extra energy contributed by these secondary decays. You will need the following mass data: mass of 235 92U=235.04393u, mass of 140 54Xe=139.92144u, mass of 9438Sr=93.91523u, and mass of 10n=1.008665u.PART A: What is the reaction energy Q of this reaction? Use c2=931.5MeV/u.PART B:Using fission, what mass m of uranium-235 would be necessary to supply all of the energy that the United States uses in a year, roughly 1.0 x 1019J?Express your answer in kilograms to two significant figures.

A container holds a pure sample of a radioactive substance with a half-life of 2 hours.Which of the following statements are true?a) After 1 hour, less than 50% of the original atoms in the container will have decayed.b) After 1 hour, more than 50% of the original atoms in the container will have decayed.c) After 2 hours, 50% of the original atoms in the container will have decayed.d) After 4 hours, 25% of the original atoms will have decayed.e) After 4 hours, the total number of atoms in the container will be reduced by 75%.

The nuclear mass of 141 Ba is 140.883 amu. Calculate the Binding energy per nucleon for 141 Ba.In J/Nucleon

Which of the following statements are true concerning a stable nucleus?Check all that apply.A. There is a limit to the size of a stable nucleus because of the short range of the strong nuclear force.B. A stable nucleus contains a larger number of neutrons than protons.C. There is no limit to the size of a stable nucleus because of the great strength of the strong nuclear force.D. A stable nucleus contains nearly equal numbers of protons and neutrons.E. A stable nucleus contains a larger number of protons than neutrons.

What is the average density of the sun? Express answer in kg/m3

Calculate the binding energy per nucleon for 12C. (Use the table of atomic masses as necessary).

Calculate the binding energy per nucleon for 14N. (Use the table of atomic masses as necessary)

Calculate the binding energy per nucleon for 4He. (Use the table of atomic masses as necessary.)

Nuclear reactors generate power by harnessing the energy from nuclear fission. In a fission reaction, uranium-235 absorbs a neutron, bringing it into a highly unstable state as uranium-236. This state almost immediately breaks apart into two smaller fragments, releasing energy. One typical reaction is 235 92U+10n→ 140 54Xe+9438Sr+210n, where 10n indicates a neutron. In this problem, assume that all fission reactions are of this kind. In fact, many different fission reactions go on inside a reactor, but all have similar reaction energies, so it is reasonable to calculate with just one. The products of this reaction are unstable and decay shortly after fission, releasing more energy. In this problem, you will ignore the extra energy contributed by these secondary decays. You will need the following mass data: mass of 235 92U=235.04393u, mass of 140 54Xe=139.92144u, mass of 9438Sr=93.91523u, and mass of 10n=1.008665u.Using fission, what mass m of uranium-235 would be necessary to supply all of the energy that the United States uses in a year, roughly 1.0 x 1019J, given that reaction energy, Q = 185 MeV?Express your answer in kilograms to two significant figures.

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