Neutron-deficient Mercury Isotopes1
Journal Article
·
· Journal of the American Chemical Society
- Univ. of Rochester, NY (United States)
In this work, high energy bombardments with protons on gold and α-particles on platinum were performed to study neutron-deficient mercury isotopes. Two new mercury isotopes have been definitely identified: Hg192, T1/2 = 5.7 ± 0.5 hours, 1.18 mev. ß+, 0.18 mev. conversion electrons, K, L X-rays and 1.39 mev. γ-ray; parent of 4.0 hour Au192. Hg193, T1/2 = 10.0 ± 0.5 hours Noß+, K, L X-rays, 0.18 mev. conversion electrons; parent of 15.3 hour Au193. Tentatively identified was Hg195 of 31 hour half-life, although this value may be in error owing to masking by the isomeric pair at Hg197. Decay of Hg195 leaves gold daughter of 180-day half-life; although this genetic relation has not been established quantitatively, long-lived gold daughter has been observed. No positrons are emitted by Hg195 but K and L X-rays are detected. No activity was found which canbe allocated to Hg194. Positron-emitting 39.5-hour Au194 was not present among the gold daughters. An unidentified 2.0-hour mercury activity, present in increasing yield with increasing proton bombardment energy, must have mass number 191 or lower. Finally, the genetic relationships between Hg192-Au192 and between Hg193-Au193 have been established quantitatively.
- Research Organization:
- Univ. of California, Berkeley, CA (United States). Radiation Laboratory; Univ. of Rochester, NY (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- NSA Number:
- NSA-05-006904
- OSTI ID:
- 4415119
- Report Number(s):
- NYO--702
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 10 Vol. 74; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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