Neutron Deficient Isotopes of Iodine,

The iodine isotopes I123, I122, I121, and I120 have been made by bombarding antimony with alpha-particles. Their characteristics are summarized and evidence for mass assignments presented. During the course of some investigations of abnormal change in nuclear charge following irradiation with high-energy particles, some of the nuclides encountered proved to be light isotopes of iodine which had not been reported previously. The main study will be reported at a later date while the present communication describes some work done to characterize and identify the iodine isotopes. The mass number region of interest is that below I124 as higher isotopes are well known.