Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    This is for people who understand isotopes and pharmaceuticals... Please help me ):

    " The isotope Technetium-99m is a useful radionuclide as it is a pure gamma emitter with a short half-life. This means that it does not produce more damaging alpha and beta particles and its radioactivity disappears after a few hours. It is the lightest radioactive element known. With technetium-99m, there's a delay between its initial production and emission of gamma radiation further adding to the benefits of its use.

    Technetium-99m is produced when molybdenum-99 nucleus decays through beta emission. After a few hours, Technetium-99m emits a gamma ray and becomes Technetium-99. Because Technetium-99m will decay into Technetium-99, regardless of use, it must be constantly replenished by the Nuclear Medicine department. "

    Reps for help!
    Offline

    19
    ReputationRep:
    (Original post by The Egg Militia)
    This is for people who understand isotopes and pharmaceuticals... Please help me ):

    " The isotope Technetium-99m is a useful radionuclide as it is a pure gamma emitter with a short half-life. This means that it does not produce more damaging alpha and beta particles and its radioactivity disappears after a few hours. It is the lightest radioactive element known. With technetium-99m, there's a delay between its initial production and emission of gamma radiation further adding to the benefits of its use.

    Technetium-99m is produced when molybdenum-99 nucleus decays through beta emission. After a few hours, Technetium-99m emits a gamma ray and becomes Technetium-99. Because Technetium-99m will decay into Technetium-99, regardless of use, it must be constantly replenished by the Nuclear Medicine department. "

    Reps for help!
    imo you could do more to link the half life to the properties which make it a desirable diagnostic tracer as well as causing difficulties - you need to be located near a nuclear medicine lab. possible marks lost for seeming to imply that the radioactivity goes to zero when they're probably looking for you to say it becomes negligible/insignificant in comparison with the background level.

    you could do more to link the penetration of tissue by gamma to it's weak ionisation of tissue (i.e. damage) - a high proportion of the gamma produced emerges from the patient to be detected because so little of it ionises atoms on it's journey through the patient.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What newspaper do you read/prefer?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.