The 4 cs of dysfunctional dating
The 4 cs of dysfunctional dating - updating a materialized view in oracle
These are I (half-life 8 days) is one of the common radioactive fission-products of nuclear fission, and is thus produced inadvertently in very large amounts inside nuclear reactors.
Note the prominence of radiation from I-131 and Te-132/I-132 for the first week.
Abnormal results may be caused by disorders such as Graves' disease or Hashimoto's thyroiditis.
Both isotopes decay by electron capture (EC) to the corresponding tellurium nuclides, but in neither case are these the metastable nuclides Te-123m and Te125m (which are of higher energy, and are not produced from radioiodine).
Instead, the excited tellurium nuclides decay immediately (half-life too short to detect).
Following EC, the excited Te-123 from I-123 emits a high-speed 127 ke V internal conversion electron (not a beta ray) about 13% of the time, but this does little cellular damage due to the nuclide's short half-life and the relatively small fraction of such events.
Two images are seen of the same patient from front and back.
Note the dark image of the thyroid due to unwanted uptake of radioiodine from the medication by the thyroid gland in the neck.
The purpose of this therapy, which was first explored by Dr.
Saul Hertz in 1941, I is taken up into thyroid tissue and concentrated there.
There are some situations in which iodine-124 and iodine-125 are used in medicine, also.
Due to preferential uptake of iodine by the thyroid, radioiodine is extensively used in imaging of and, in the case of I-131, destroying dysfunctional thyroid tissues.
The beta particles emitted by the radioisotope destroys the associated thyroid tissue with little damage to surrounding tissues (more than 2.0 mm from the tissues absorbing the iodine).