THE NEUTRON DEFICIENT IRIDIUM ISOTOPES Ir$sup 182$, Ir$sup 183$, AND Ir$sup 18$$sup 4$
The new neutron-deficient iridium isotopes Ir/sup 182/, Ir/sup 183/ >s, and Ir/sup 184/ were produced by irradiations with the Berkeley heavyion linear accelerator. By means ot timed chemical separations, Nal scintillation spectrometers, and proportional counters, half lives were determined as follows: Ir/sup 182/ , 15 plus or minus 1 min; Ir/sup 183/ , 55 plus or minus 7 min; Ir/ sup 184/, 3.2 plus or minus 0.2 hr. The g amma spectra of l/sup 182/ and lr/ sup 184/ are very complex. each extendi ng above 4 Mev. Positon branches are also seen in both isotopes. Studies of the gamma spectra indicate that the energies of the first and second excited states of Os/sup 182/ are slightly higher than the corresponding states in Os/sup >84/. These data suggest that there is a maximum in the moment of inertia at Os/sup 184/ . (auth)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-15-025481
- OSTI ID:
- 4016430
- Report Number(s):
- UCRL-9532
- Journal Information:
- Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 25
- Country of Publication:
- United States
- Language:
- English
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