- Autor(in)
- Referenz
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10 Prasad, K. G., K. P. Gapinathan and M. C. Joshi, Nuclear Physics 58 (1964) 305.
11 Smend, F., W. Weiranch, W. D. Schmidt-Ott and A. Flammersfeld, Z. Physik 191 (1966) 1.
12 Mukherjee, P., Bull. Amer. Phys. Soc. 8 (1963) 47.
13 Strominger, D., J. M. Hollander and G. T. Seaborg, Rev. mod. Physics 30 (1958) 585.
1 Braunstein, A., and A. De Shalit, Phys. Lett. 1 (1962) 264.
2 Helmer, R. G., Phys. Rev. 131 (1963) 2597.
3 Rester, D. H., M. S. Moore, F. E. Durham and C. M. Class, Nuclear Physics 22 (1961) 104.
4 Stelson, P. H., and F. K. McGowan, Phys. Rev. 99 (1955) 112.
5 Helmer, R. G., and L. D. McIsaac, Phys. Rev. 137 (1965) B 223.
6 El-Nesr, M. S., and G. M. El-Sayad, Int. Rep. 2. U.A.R., A. E. E. 1965.
7 Hultberg, S., Arkiv Fysik 15 (1959) 307.
8 Hultberg, S., B. Nagel and P. Olsson, Arkiv Fysik 20 (1961) 555.
9 Sliv, L. A., and I. M. Band, Tables of Internal conversion coefficients, Alpha-Beta and gamma ray spectroscopy, Appendix 5, [ed. K. SIEGBAHN, Amsterdam 1965].
- Seitenbereich
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0152 - 0161
- Zusammenfsg.
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The internal conversion electron spectrum of transitions in the decays of the (86 min) <sup>197<I>m</I></sup>Pt and the (18 h) <sup>197</sup>Pt have been studied by means of an iron-free, double focussing beta-ray spectrometer. Conversion electrons were observed for transitions of 268.2 ± 0.2 and 269.1 ± 0.2 keV, the first ascribed to the decay of (18 h) <sup>197</sup>Pt while the second ascribed to the decay of (86 min) <sup>197<I>m</I></sup>Pt. An energy level in <sup>197</sup>Au at 548 keV has also been observed for the first time from the decay of <sup>197<I>m</I></sup>Pt, de-excited by the 269 - 279 keV cascade and a direct 548.4 ± 0.4 keV transition to the ground state. A new gamma transition of energy 202.5 ± 0.1 keV was found, decays from the 279 keV excited level in <sup>197</sup>Au, with an <I>E</I>2 character. The internal <I>K</I>-conversion coefficients of most transitions in <sup>197</sup>Pt and <sup>197</sup>Au were determined by the internal-external conversion method. The <I>K</I>-internal conversion coefficient of the 191 keV transition in <sup>197</sup>Au indicated no <I>E</I>0 contribution. Multipolarity data, obtained from the absolute or ratios measurements of conversion coefficients, were utilized for assigning possible spins and parities to the levels in <sup>197</sup>Pt and <sup>197</sup>Au.
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- Forschungsartikel