Beta Particles Or Rays and Their Properties
What is the difference between cathode rays and beta rays? When the two are travelling in space, can you make out which is the cathode ray and which is the beta ray?
In beta decay, an electron (or a positron) is emitted by a nucleus. Does the remaining atom get oppositely charged?
A free neutron beta-decays to a proton with a half-life of 14 minutes. (a) What is the decay constant? (b) Find the energy liberated in the process.
(Use Mass of proton mp = 1.007276 u, Mass of `""_1^1"H"` atom = 1.007825 u, Mass of neutron mn = 1.008665 u, Mass of electron = 0.0005486 u ≈ 511 keV/c2,1 u = 931 MeV/c2.)
Complete the following decay schemes.
(a) `"" _88^226Ra → alpha+`
(b) `""_8^19O → _9^19F+`
(c) `""_13^25Al → ""_12^25Mg+`
Ten grams of 57Co kept in an open container beta-decays with a half-life of 270 days. The weight of the material inside the container after 540 days will be very nearly