Neutron-deficient Mercury Isotopes¹

Journal Article · Wed May 01 00:00:00 UTC 2002 · Journal of the American Chemical Society

DOI: https://doi.org/10.1021/ja01130a004 · OSTI ID:4415119

Fink, Richard W. ^[1]; Wiig, Edwin O. ^[1]

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1. 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, T_1/2 = 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, T_1/2 = 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