https://physlab-wiki.com/ 2026-04-15T01:48:05+00:00 https://physlab-wiki.com/ https://physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2026-01-20T09:54:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/phylabs/lab_courses/phys-211-wiki-home/mass-of-the-neutron/lower_energy_gammas?rev=1768920855&do=diff Lower energy gammas from iodine excitation There are a number of gammas created at lower energies (<750 KeV) that are due to excitation of iodine atoms in the sodium iodide detector. It is not essential to understand (or measure the energy or count rates of) these gammas as part of the mass of the neutrons experiment, but students (and TAs) are often curious about the peaks which appear in the spectrum.$\beta^-$$\beta^+$ text/html 2024-06-11T16:34:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/phylabs/lab_courses/phys-211-wiki-home/mass-of-the-neutron/neutron_mass_ta_notes?rev=1718138088&do=diff TA Notes for Neutron Mass Experiment Pre-Meeting * Have the students go over the pre-lab questions and make sure they understand the underlying concepts. * Get them thinking about the logic puzzle without giving them the explicit answers. It is less important that they have figured out all of the steps than it is that they understand that the most important aspect of the experiment is showing (scientifically) that the peak they are measuring is in fact due to neutrons interacting with pro… text/html 2026-01-22T14:12:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/phylabs/lab_courses/phys-211-wiki-home/mass-of-the-neutron/start?rev=1769109171&do=diff Mass of the Neutron TA Notes The mass of charged particles – such as protons and electrons – can be investigated using mass spectrometry whereby a beam of such particles is bent by a magnetic field and the radius of curvature is measured. For chargeless particles – like neutrons – such techniques do not work and we must be more creative. In this experiment, you will use some known facts about neutrons to design and test an experiment with the goal of determining the mass of the neutron. This l…