What type of radiation is emmited by (gamma p32) labelled ATP, what could be the effect/ side effect of its expossure,
Phosphorus 32 emits beta- radiation (electrons). The energy of the electron is not very high, so it has a comparatively short mean free path. Decay product is sulfur 32 in ground state, hence there is no gamma radiation. Which may be the reason, why P32 is used for labelling.
P-32 is pure beta emitter (no gamma emission) having energy of 1.7 MeV and half life 14.2 days. It is used in Bone pain palliation therapy, radiation synovectomy in severe arthritic patient. From radiation point of view no radiation exposure is involved to public but for patient it may lead to bone marrow suppression and thus reduction in RBC count.
32P is a radioactive isotope which is a beta emitteri .e. emitting electrons + antineutrinos. The maximum energy of the emitted electrons is 1.71 MeV. The effect of exposure to 32P may cause many effects depending on the medium surrounding the radioactive material. 32P is used as a tracer in nuclear medicine. One very interesting application is to use 32P for treating cancerous tissue within the human body. The emitted electrons hitting the tissue can have a therapeutic effect by destroying the cancerous cells (which tend to accumulate phosphorous).
Raymond Moreh, Ben-Gurion Univesity, Israel
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