Abstract
Theβ −-decay of 7.6-min105Tc has been investigated byβ- andγ-ray singles and coincidence measurements. The activities have been produced by thermal-neutron-induced fission of235U or239Pu and subsequent chemical separation of the technetium fraction from the fission product mixture. AQ β-value of 3.2±0.2 MeV has been determined. In a delayed coincidence experiment the lifetime of the first excited state in105Ru at 20.55 keV has been measured to be 340±15 nsec. A level scheme of105Ru is proposed and compared with the results of recent nuclear reaction studies like104Ru(d, p) and104Ru(n, γ). From beta branching ratios to levels in105Ru, ground state spin and parity of 5/2+ can be suggested for105Tc in accordance with the trend observed in neutron rich technetium isotopes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Lederer, C.M., Jaklevic, J.M., Hollander, J.M.: Nucl. Phys. A169, 449 (1971)
Cheifetz, E., Jared, R.C., Thompson, S.G., Wilhelmy, J.B.: Phys. Rev. Lett.25, 38 (1970)
Cheifetz, E., Wilhelmy, J.B., Jared, R.C., Thompson, S.G.: Phys. Rev. C4, 1913 (1971)
Casten, R.F., Flynn, E.R., Hansen, O., Mulligan, T., Sheline, R.K., Kienle, P.: Phys. Lett.32 B, 45 (1970)
Casten, R.F., Flynn, E.R., Hansen, O., Mulligan, T.J.: Nucl. Phys. A184, 357 (1972)
Kaffrell, N., Trautmann, N., Herrmann, G., Ahrens, H.: Phys. Rev. C8, 320 (1973)
Fortune, H.T., Morrison, G.C., Nolen, J.A., Kienle, P.: Phys. Rev. C3, 337 (1971)
Maier-Komor, P.: Ph.D. Thesis, Technische Universität München (1974)
Hrastnik, B., Seyfarth, H., Hassan, A.M., Delang, W., Göttel, P.: Nucl. Phys. A219, 381 (1974)
Kienle, P., Wien, K., Zahn, U., Weckermann, B.: Z. Physik176, 226 (1963)
Kauranen, P., Karras, M., Raunemaa, T.: Radiochim. Acta7, 114 (1967)
Cook, W.B., Johns, M.W.: Can. J. Phys.50, 1511 (1972)
Krämer, K., Huber, B.W.: Z. Physik267, 117 (1974)
Trautmann, N., Kaffrell, N., Behlich, H.W., Folger, H., Herrmann, G., Hübscher, D., Ahrens, H.: Radiochim. Acta18, 86 (1972)
Schriber, S.O., Johns, M.W.: Nucl. Phys. A96, 337 (1967)
Gove, N.B., Martin, M.J.: Nucl. Data Tables10, 205 (1971)
Cook, W.B., Johns, M.W.: Can. J. Phys.50, 1957 (1972)
Hein, W.W.: Ph.D. Thesis, Iowa State University IS-T-391 (1970)
Sümmerer, K., Kaffrell, N., Trautmann, N.: To be published
Stelson, P.H., Grodzins, L.: Nucl. Data A1, 21 (1965)
Imanishi, N., Fujiwara, I., Nishi, T.: Nucl. Phys. A205, 531 (1973)
Hager, R.S., Seltzer, E.C.: Nucl. Data A4, 1 (1968)
Dragoun, O., Plajner, Z., Schmutzler, F.: Nucl. Data Tables A9, 119 (1971)
Moszkowski, S.A.: In: Alpha-, beta- and gamma ray Spectroscopy, ed. K. Siegbahn, vol. 2, p. 881. Amsterdam: North Holland 1965
Kistner, O.C., Schwarzschild, A.: Phys. Rev.154, 1182 (1967)
de-Shalit, A., Talmi, I.: Nuclear shell theory, p. 409. New York: Academic Press 1963
de-Shalit, A.: Phys. Rev.122, 1530 (1961)
Goswami, A., McDaniels, D.K.: Phys. Rev. C7, 1263 (1973)
Goswami, A., Nalcioĝlu, O.: Phys. Lett.26 B, 353 (1968)
Goswami, A., Sherwood, A.I.: Phys. Rev.161, 1232 (1967)
Rickey, F.A., Simms, P.C.: Phys. Rev. Lett.31, 404 (1973)
Author information
Authors and Affiliations
Additional information
The authors express their gratitude to Prof. G. Herrmann for his interest in this work. We wish to thank Mrs. E. Kreß and Messrs. K.H. Gläsel, R. Heimann, and U. Tharun, as well as the staff of the Mainz TRIGA reactor for their cooperation. Financial support from the Bundesministerium für Forschung und Technologie is gratefully acknowledged.
Rights and permissions
About this article
Cite this article
Sümmerer, K., Kaffrell, N. & Trautmann, N. The decay of105Tc to levels in105Ru. Z Physik A 273, 77–84 (1975). https://doi.org/10.1007/BF01435761
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01435761