| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.HL.TZ1.39 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 39 | Adapted from | N/A |
Question
A particle of fixed energy is close to a potential barrier.
Which changes to the width of the barrier and to the height of the barrier will always make the tunnelling probability greater?
Markscheme
D
Examiners report
[N/A]
Syllabus sections
Show 84 related questions
- 18M.2.HL.TZ2.9d.iii: Calculate the wavelength of the gamma ray photon in (d)(ii).
- 18M.2.HL.TZ2.9d.i: Explain what may be deduced about the energy of the electron in the β– decay.
- 18M.1.HL.TZ2.40: Two samples X and Y of different radioactive isotopes have the same initial activity. Sample...
- 18M.1.HL.TZ2.39: An electron of initial energy E tunnels through a potential barrier. What is the energy of...
- 18M.2.HL.TZ1.6b.iii: Beryllium-10 is used to investigate ice samples from Antarctica. A sample of ice initially...
- 18M.1.HL.TZ1.40: Alpha particles with energy E are directed at nuclei with atomic number Z. Small deviations...
- 17N.2.HL.TZ0.3d.iii: Draw a line on the graph, to show the variation of nuclear radius with nucleon number.
- 17N.2.HL.TZ0.3d.ii: Plot the position of magnesium-24 on the graph.
- 17N.2.HL.TZ0.3b.ii: Outline why the particles must be accelerated to high energies in scattering experiments.
- 17N.2.HL.TZ0.3b.i: Outline how these experiments are carried out.
- 17M.2.HL.TZ2.5b.ii: Show that about 3 x 1015 alpha particles are emitted by the radium-226 in 6 days.
- 17M.2.HL.TZ2.5b.i: Deduce that the activity of the radium-226 is almost constant during the experiment.
- 17M.1.HL.TZ2.40: A radioactive element has decay constant \(\lambda \) (expressed in s–1). The number of...
- 17M.1.HL.TZ2.37: When monochromatic light is incident on a metallic surface, electrons are emitted from the...
- 17M.1.HL.TZ1.40: Electron capture can be represented by the equation p + e– → X + Y. What are X and Y?
- 17M.1.HL.TZ1.37: The diameter of a silver-108 (\({}_{47}^{108}Ag\)) nucleus is approximately three times that...
- 16M.2.HL.TZ0.11b: The nucleus of \({}_{79}^{197}{\rm{Au}}\) is replaced by a nucleus of the isotope...
- 16M.2.HL.TZ0.11a: An alpha particle with initial kinetic energy 32 MeV is directed head-on at a nucleus of...
- 16N.2.HL.TZ0.4d: C-14 decay is used to estimate the age of an old dead tree. The activity of C-14 in the dead...
- 16N.1.HL.TZ0.39: Which of the following, observed during a radioactive-decay experiment, provide evidence for...
- 16M.1.HL.TZ0.40: ...
- 16M.1.HL.TZ0.39: A...
- 16M.1.HL.TZ0.37: Deviations from...
- 15M.1.HL.TZ1.33: A particular radioactive substance decays and emits both β\(^ + \) particles and neutrinos....
- 15M.1.HL.TZ2.32: The following observations are made during nuclear decays. I. Discrete energy of alpha...
- 15M.2.HL.TZ2.2c: U-235 \(\left( {{}_{92}^{235}{\rm{U}}} \right)\) can undergo alpha decay to form an isotope...
- 15M.3.SL.TZ1.7a: Outline why the existence of neutrinos was hypothesized to account for the energy spectrum of...
- 15M.3.SL.TZ1.7b: The decay constant for magnesium-23 is 0.061 s−1. Calculate the time taken for the number of...
- 15M.3.SL.TZ2.7a: Outline how the half-life of X can be determined experimentally.
- 15M.3.SL.TZ2.7b: A pure sample of X has a mass of 1.8 kg. The half-life of X is 9000 years. Determine the mass...
- 14M.2.SL.TZ1.5d: Potassium-38 decays with a half-life of eight minutes. (i) Define the term radioactive...
- 15N.2.HL.TZ0.6c.iii: Radium-226 has a half-life of 1600 years. Determine the time, in years, it takes for the...
- 14M.3.SL.TZ1.5c: Particle X has an initial kinetic energy of 6.2MeV after the decay in (b). In a scattering...
- 14M.3.SL.TZ1.5a: Define decay constant.
- 14M.3.SL.TZ1.5b: A sample of 1.6 mol of the radioactive nuclide...
- 15N.3.SL.TZ0.7c.i: State what is meant by half-life.
- 14N.1.HL.TZ0.27: Three types of radiation emitted from radioactive materials are given below. I. AlphaII....
- 14N.1.HL.TZ0.34: A radioactive nuclide decays to a stable daughter nuclide. Initially the sample consists...
- 14N.3.SL.TZ0.7b.i: Outline a method for measuring the half-life of an isotope, such as the half-life of carbon-11.
- 14N.3.SL.TZ0.7b.ii: State the law of radioactive decay.
- 14N.3.SL.TZ0.7b.iii: Derive the relationship between the half-life \({T_{\frac{1}{2}}}\) and the decay constant...
- 14N.3.SL.TZ0.7b.iv: Calculate the number of nuclei of carbon-11 that will produce an activity of...
- 14M.3.SL.TZ2.6b: Show that the decay constant \(\lambda \) is related to the half-life \({T_{\frac{1}{2}}}\)...
- 14M.3.SL.TZ2.6a: Define the decay constant of a radioactive isotope.
- 14M.3.SL.TZ2.6c: Strontium-90 is a radioactive isotope with a half-life of 28 years. Calculate the time taken...
- 11N.1.SL.TZO.23: In Geiger and Marsden’s experiments a thin gold foil was bombarded with alpha particles. It...
- 12N.1.HL.TZ0.36: Evidence for nuclear energy levels comes from discrete energies of I. alpha particlesII....
- 12N.1.HL.TZ0.37: Which particles are emitted in β+ decay? A. Positron and neutrinoB. Positron and...
- 13N.1.HL.TZ0.33: The decay constant is the probability of the A. number of radioactive decays per unit...
- 13M.1.HL.TZ1.32: A radioactive sample of initial activity 12.0Bq has a half-life of 3.0 days. Which of the...
- 12M.1.HL.TZ2.31: The decay constant of a radioactive isotope is 10–3s–1. Which of the following is the...
- 13M.3.SL.TZ1.6c: Sodium-22 has a decay constant of 0.27 yr–1. (i) Calculate, in years, the half-life of...
- 11M.1.HL.TZ2.31: Which of the following provides...
- 11M.1.HL.TZ2.32: ...
- 13M.1.HL.TZ2.28: The decay constant of a radioactive isotope with half-life T is defined as A....
- 12M.3.SL.TZ1.4a: Define decay constant.
- 12M.3.SL.TZ1.4b: Plutonium-238 is to be used as a power source in a space probe. (i) Determine the initial...
- 11M.3.SL.TZ2.5a: (i) Define decay constant. (ii) A sample of nitrogen-13 has an initial activity of 800 Bq....
- 11M.3.SL.TZ2.5c: Nitrogen-13 undergoes β+ decay. Outline the experimental evidence that suggests another...
- 11M.3.SL.TZ2.5b: (i) Calculate the half-life of nitrogen-13. (ii) Outline how the half-life of a sample of...
- 11N.2.HL.TZ0.3b: Tritium is a radioactive nuclide with a half-life of 4500 days. It decays to an isotope of...
- 12N.3.SL.TZ0.6b: The half-life of potassium-40 is 1.3×109yr. In a particular rock sample it is found that 85 %...
- 12N.2.SL.TZ0.3b: Determine the fraction of caesium-137 that will have decayed after 120 years.
- 12M.3.SL.TZ2.6b: The isotope potassium-40 occurs naturally in many rock formations. In a particular sample of...
- 12N.3.SL.TZ0.7: This question is about neutrinos. The spectrum of electron energies emitted in a typical...
- 12N.2.HL.TZ0.8c: (i) One possible waste product of a nuclear reactor is the nuclide caesium-137...
- 12M.3.SL.TZ2.6a: The isotope bismuth-212 undergoes α-decay to an isotope of thallium. In this decay...
- 12N.3.SL.TZ0.6a: A nuclide of the isotope potassium-40 \(\left( {{}_{19}^{40}{\rm{K}}} \right)\) decays into a...
- 13N.2.HL.TZ0.10f: The alpha particles and gamma rays produced in radioactive decay have discrete energy...
- 12M.3.HL.TZ2.23c: In a deep inelastic scattering experiment, protons of momentum 2.70 ×10–18 N s are scattered...
- 13N.3.SL.TZ0.5b: Overall about 10% of a sample of K-40 will decay to argon. In a particular rock sample it is...
- 11M.1.HL.TZ1.33: The half-life of a radioactive isotope is 10 days. What is the percentage of the sample...
- 12M.3.HL.TZ2.23d: Outline how deep inelastic scattering experiments led to the conclusion that gluons exist.
- 11M.1.HL.TZ1.32: Different nuclides spontaneously undergo radioactive decay, emitting either α, β or γ...
- 11M.3.SL.TZ1.6a: State the reaction for the decay of the I-124 nuclide.
- 11M.3.SL.TZ1.6b: The graph below shows how the activity of a sample of iodine-124 changes with time. (i)...
- 09M.1.HL.TZ1.32: The radii of nuclei can be estimated from experiments involving A. the scattering of...
- 09M.1.HL.TZ1.27: A beam of electrons is accelerated from rest through a potential difference \(V\). The de...
- 10N.1.HL.TZ0.30: The radii of nuclei may be determined by A. scattering charged particles off the...
- 10N.2.HL.TZ0.B1Part2.c: Electrons with the same kinetic energy as those in (b) are incident on a circular aperture of...
- 10N.2.HL.TZ0.B1Part2.b: A beam of electrons is accelerated from rest through a potential difference of 85 V. Show...
- 10N.3.HL.TZ0.J3b: Use the conservation of lepton number and charge to deduce the nature of the particle x in...
- 10N.3.SL.TZ0.B3b: (i) Calculate the decay constant of Au-189. (ii) Determine the activity of the...
- 10N.3.HL.TZ0.J3c: State what is meant by deep inelastic scattering.
