Abstract.
The decay of the isotopes 255Rf, 251No and 247Fm produced in the reactions \(\mathrm{{}^{207}Pb\ensuremath({}^{50}Ti,2n){}^{255}Rf\ {}^{\alpha}_{\rightarrow}\ {}^{251}No\ \ensuremath{}^{\alpha}_{\rightarrow}\ {}^{247}Fm}\), and \(\mathrm{{}^{206}Pb\ensuremath({}^{48}Ca,3n){}^{251}No\ \ensuremath{}^{\alpha}_{\rightarrow}\ {}^{247}Fm}\) was investigated by means of α-γ spectroscopy. Previously observed γ transitions in coincidence with α decays of 255Rf were confirmed, their energies and line intensities were measured more precisely, and their multipolarities were determined as E1. In 251No a new isomeric state at E * > 1700keV with a half-life of ≈ 2μs was identified. The decay of 247Fm was measured more precisely. A partial level scheme of the daughter nucleus 243Cf could be established.
Similar content being viewed by others
References
M. Leino, F.P. Heßberger, Annu. Rev. Nucl. Part Sci. 54, 175 (2004).
R.-D. Herzberg, J. Phys. G 30, R123 (2004).
I Ahmad, J.P. Greene, E.F. Moore, F.G. Kondev, R.R. Chasman, C.E. Porter, L.K. Felker, Phys. Rev. C 72, 054308 (2005).
I. Ahmad, J. Milsted, R.K. Sjoblom, J. Lerner, P.R. Fields, Phys. Rev. C 8, 735 (1973).
R.-D. Herzberg, P.T. Greenlees, P.A. Butler, G.D. Jones, M. Venhart, I.G. Darby, S. Eeckhaudt, K. Eskola, T. Grahn, C. Gray-Jones, F.P. Heßberger, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, T.L. Khoo, W. Korten, M. Leino, A.-P. Leppänen, S. Moon, M. Nyman, R.D. Page, J. Pakarinen, A. Pritchard, P. Rahkila, P. Reiter. J. Saren, C. Scholey, A. Steer, Y. Sun, Ch. Theisen, S. Tandel, J. Uusitalo, Nature 44, 896 (2006).
F.P. Heßberger, Int. J. Mod. Phys. E 15, 284 (2006).
F.P. Heßberger, S. Antalic, B. Streicher, S. Hofmann, D. Ackermann, B. Kindler, I. Kojouharov, P. Kuusiniemi, M. Leino, B. Lommel, R. Mann, K. Nishio, S. Saro, B. Sulignano, Eur. Phys. J. A 26, 233 (2005).
F.P. Heßberger, S. Hofmann, D. Ackermann, P. Cagarda, R.-D. Herzberg, I. Kojouharov, P. Kuusiniemi, M. Leino, R. Mann, Eur. Phys. J. A 22, 417 (2004).
F.P. Heßberger, S. Hofmann, D. Ackermann, V. Ninov, M. Leino, G. Münzenberg, S. Saro, A. Lavrentev, A.G. Popeko, A.V. Yeremin, Ch. Stodel, Eur. Phys. J. A 12, 57 (2001).
B. Kindler, D. Ackermann, W. Hartmann, F.P. Heßberger, S. Hofmann, B. Lommel, R. Mann, J. Steiner, Nucl. Instrum. Methods Phys. Res. A 561, 107 (2006).
H. Folger, W. Hartmann, F.P Heßberger, S. Hofmann, J. Klemm, G. Münzenberg, V. Ninov, W. Thalheimer, P. Armbruster, Nucl. Instrum. Methods A 362, 64 (1995).
G. Münzenberg, W. Faust, S. Hofmann, P. Armbruster, K. Güttner, H. Ewald, Nucl. Instrum. Methods 161, 65 (1979).
S. Hofmann, V. Ninov, F.P. Heßberger, P. Armbruster, H. Folger, G. Münzenberg, H.J. Schött, A.G. Popeko, A.V. Yeremin, A.N. Andreyev, S. Saro, R. Janik, M. Leino, Z. Phys. A 350, 277 (1995).
S. Hofmann, W. Faust, G. Münzenberg, W. Reisdorf, P. Armbruster, K. Güttner, H. Ewald, Z. Phys. A 291, 53 (1979).
S. Hofmann, G. Münzenberg, Rev. Mod. Phys. 72, 733 (2000).
F.P. Heßberger, S. Hofmann, D. Ackermann, Eur. Phys. J. A 16, 365 (2003).
F.P. Heßberger, S. Hofmann, D. Ackermann, S. Antalic, B. Kindler, I. Kojouharov, P. Kuusiniemi, M. Leino, B. Lommel, R. Mann, K. Nishio, A.G. Popeko, B. Sulignano, S. Saro, B. Streicher, M. Venhart, A. Yeremin, Eur. Phys. J. A 29, 165 (2006).
R.S. Hager, E.C. Seltzer, Nucl. Data A 4, 1 (1968).
R.B. Firestone, V.S. Shirley, C.M. Baglin, S.Y. Frank Chu, J. Zipkin, Table of Isotopes (John Wiley & Sons, Inc., New York, Chicester, Brisbane, Toronto, Singapore, 1996).
M.J. Martin, Nucl. Data Sheets 106, 89 (2005).
S.W. Yates, I. Ahmad, A.M. Friedman, F.J. Lynch, R.E. Holland, Phys. Rev. C 11, 599 (1975).
J.K. Dickens, J.W. McConnell, Phys. Rev. C 22, 1344 (1980).
F.P. Heßberger, S. Hofmann, G. Münzenberg, K.-H- Schmidt, P. Armbruster, R. Hingmann, Nucl. Instrum. Methods Phys. Res. A 274, 522 (1989).
A. Sobiczewski, I. Muntian, Z. Patyk, Phys. Rev. C 63, 034306 (2001).
A. Parkhomenko, A. Sobiczewski, Acta Phys. Pol. B 36, 3095 (2005).
Author information
Authors and Affiliations
Additional information
R. Krücken
Rights and permissions
About this article
Cite this article
Heßberger, F.P., Hofmann, S., Ackermann, D. et al. Alpha-gamma decay studies of 255Rf, 251No and 247Fm. Eur. Phys. J. A 30, 561–569 (2006). https://doi.org/10.1140/epja/i2006-10137-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epja/i2006-10137-2