Abstract
The synthesis of element 116 in fusion-evaporation reactions of a 48Ca beam with radioactive 248Cm targets was studied at the velocity filter SHIP of GSI in Darmstadt. At excitation energies of the compound nuclei of 40.9MeV, four decay chains were measured, which were assigned to the isotope 292116, and one chain, which was assigned to 293116. Measured cross-sections of (3.4 +2.7−1.6 ) pb and (0.9 +2.1−0.7 ), respectively, and decay data of the chains agree with data measured previously at the Flerov Laboratory of Nuclear Reactions in Dubna. As a new result, one α-decay chain was measured, which terminates after four α decays by spontaneous fission. The α energies of the second-to-fourth decay are considerably higher than those measured for the α decays of 289114, 285Cn, and 281Ds and the spontaneous fission half-life is significantly longer than that of 277Hs measured in previous experiments. A possible assignment is discussed in the frame of excited quasiparticle states of nuclei populated in the decay chain from 293116. Also other possible assignments were considered and are discussed. At an excitation energy of 45.0MeV no events were observed resulting in a one-event cross-section limit of 1.6 pb. The technical aspects related with the use of radioactive target material at SHIP are described in detail. The experience gained in this experiment will serve as a basis for future experiments aiming to study still heavier elements at the velocity filter SHIP.
Similar content being viewed by others
References
S.G. Nilsson, J.R. Nix, A. Sobiczewski, Z. Szymanski, S. Wycech, C. Gustafson, P. Möller, Nucl. Phys. A 115, 545 (1968).
S.G. Nilsson, S.G. Thompson, C.F. Tsang, Phys. Lett. B 28, 458 (1969).
R.K. Gupta, A. Sandulescu, W. Greiner, Z. Naturforsch. 32a, 704 (1977).
E.K. Hulet, R.W. Lougheed, J.F. Wild, J.H. Landrum, P.C. Stevenson, A. Ghiorso, J.M. Nitschke, R.J. Otto, D.J. Morrissey, P.A. Baisden et al., Phys. Rev. Lett. 39, 385 (1977).
Yu.Ts. Oganessian, H. Bruchertseifer, G.V. Buklanov, V.I. Chepigin, V.S. Choi, B. Eichler, K.A. Gavrilov, H. Gaeggeler, Yu.S. Korotkin, O.A. Orlova et al., Nucl. Phys. A 294, 213 (1978).
R.J. Otto, D.J. Morrissey, D. Lee, A. Ghiorso, J.M. Nitschke, G.T. Seaborg, M.M. Fowler, R.J. Silva, J. Inorg. Nucl. Chem. 40, 589 (1978).
J.D. Illige, E.K. Hulet, J.M. Nitschke, R.J. Dougan, R.W. Lougheed, A. Ghiorso, J.H. Landrum, Phys. Lett. B 78, 209 (1978).
G. Münzenberg, W. Faust, S. Hofmann, P. Armbruster, K. Güttner, H. Ewald, Nucl. Instrum. Methods 161, 65 (1979).
S. Hofmann, W. Faust, G. Münzenberg, W. Reisdorf, P. Armbruster, K. Güttner, H. Ewald, Z. Phys. A 291, 53 (1979).
P. Armbruster, Y.K. Agarwal, W. Brüchle, M. Brügger, J.P. Dufour, H. Gäggeler, F.P. Heßberger, S. Hofmann, P. Lemmertz, G. Münzenberg et al., Phys. Rev. Lett. 54, 406 (1985).
S. Hofmann, G. Münzenberg, Rev. Mod. Phys. 72, 733 (2000).
S. Hofmann, V. Ninov, F.P. Heßberger, P. Armbruster, H. Folger, G. Münzenberg, H.J. Schött, A.G. Popeko, A.V. Yeremin, S. Saro et al., Z. Phys. A 354, 229 (1996).
S. Hofmann, F.P. Heßberger, D. Ackermann, G. Münzenberg, S. Antalic, P. Cagarda, B. Kindler, J. Kojouharova, M. Leino, B. Lommel et al., Eur. Phys. J. A 14, 147 (2002).
Yu.Ts. Oganessian, J. Phys. G: Nucl. Part. Phys. 34, R165 (2007).
Yu.Ts. Oganessian, F.Sh. Abdullin, P.D. Bailey, D.E. Benker, M.E. Bennett, S.N. Dmitriev, J.G. Ezold, J.H. Hamilton, R.A. Henderson, M.G. Itkis et al., Phys. Rev. Lett. 104, 142502 (2010).
K. Morita, K. Morimoto, D. Kaji, T. Akiyama, S. Goto, H. Haba, E. Ideguchi, K. Katori, H. Koura, H. Kikunaga et al., J. Phys. Soc. Jpn. 76, 045001 (2007).
R. Eichler, N.V. Aksenov, A.V. Belozerov, G.A. Bozhikov, V.I. Chepigin, S.N. Dmitriev, R. Dressler, H.W. Gäggeler, V.A. Gorshkov, F. Haenssler et al., Nature 447, 72 (2007).
S. Hofmann, D. Ackermann, S. Antalic, H.G. Burkhard, V.F. Comas, R. Dressler, Z. Gan, S. Heinz, J.A. Heredia, F.P. Heßberger et al., Eur. Phys. J. A 32, 251 (2007).
L. Stavsetra, K.E. Gregorich, J. Dvorak, P.A. Ellison, I. Dragojevic, M.A. Garcia, H. Nitsche, Phys. Rev. Lett. 103, 132502 (2009).
Ch.E. Düllmann, M. Schädel, A. Yakushev, A. Türler, K. Eberhardt, J.V. Kratz, D. Ackermann, L.-L. Andersson, M. Block, W. Brüchle et al., Phys. Rev. Lett. 104, 252701 (2010).
J.M. Gates, Ch.E. Düllmann, M. Schädel, A. Yakushev, A. Türler, K. Eberhardt, J.V. Kratz, D. Ackermann, L.-L. Andersson, M. Block et al., Phys. Rev. C 83, 054618 (2011).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, R.N. Sagaidak, I.V. Shirokovsky, Yu.S. Tsyganov, A.A. Voinov, A.N. Mezentsev et al., Phys. Rev. C 79, 024603 (2009).
S. Hofmann, D. Ackermann, S. Antalic, V.F. Comas, S. Heinz, J.A. Heredia, F.P. Heßberger, J. Khuyagbaatar, B. Kindler, I. Kojouharov, GSI Scientific Report 2008, GSI Report 2009-1, 131 (2009).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Atom. Nucl. 63, 1679 (2000).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Rev. C 63, 011301 (2000).
Yu.Ts. Oganessian, V.K. Utyonkov, K.J. Moody, Phys. Atom. Nucl. 64, 1349 (2001).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Eur. Phys. J. A 15, 201 (2002).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Nucl. Phys. A 734, 109 (2004).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal, JINR preprint, E7-2004-160, pp. 1--28 (2004) (http://www.jinr.ru/publish/Preprints/2004/160(E7-2004-160).pdf).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Rev. C 70, 064609 (2004).
G. Audi, A.H. Wapstra, Nucl. Phys. A 565, 1 (1993).
W.D. Myers, W.J. Swiatecki, Nucl. Phys. A 601, 141 (1996).
J.F. Ziegler, J.P. Biersack, SRIM-2000, Stopping and Range of Ions in Matter.
K. Tinschert, R. Lang, J. Mäder, J. Roßbach, P. Spädtke, A. Yakushev, Proceedings of the ECRIS-2008 Conference on Plasma Physics and Techniques, Chicago, Il, USA, (2008) pp. 92--96, Joint Accelerator Conferences Website: http://www.jacow.org.
L. Dahl, W. Barth, P. Gerhard, S. Mickat, W. Vinzenz, H. Vormann, Proceedings of the XXV Linear Accelerator Conference LINAC2010, Tsukuba, Japan, 2010 (2010) pp. 148-150, Joint Accelerator Conferences Website: http://www.jacow.org.
R. Mann, D. Ackermann, S. Antalic, F.P. Heßberger, S. Hofmann, B. Kindler, P. Kuusiniemi, B. Lommel, K. Nishio, S. Saro, GSI Scientific Report 2005, GSI Report 2006-1, 198 (2006).
K. Eberhardt, W. Brüchle, Ch.E. Düllmann, K.E. Gregorich, W. Hartmann, A. Hübner, E. Jäger, B. Kindler, J.V. Kratz, D. Liebe et al., Nucl. Instrum. Methods Phys. Res. A 590, 134 (2008).
D. Liebe, K. Eberhardt, W. Hartmann, T. Häger, A. Hübner, J.V. Kratz, B. Kindler, B. Lommel, P. Thörle, M. Schädel, J. Steiner, Nucl. Instrum. Methods Phys. Res. A 590, 145 (2008).
H. Folger, W. Hartmann, F.P. Heßberger, S. Hofmann, J. Klemm, G. Münzenberg, V. Ninov, W. Thalheimer, P. Armbruster, Nucl. Instrum. Methods Phys. Res. A 362, 64 (1995).
R. Mann, D. Ackermann, S. Antalic, H.G. Burkhard, P. Cagarda, D. Gembalies-Datz, W. Hartmann, F.P. Heßberger, S. Hofmann, B. Kindler, GSI Scientific Report 2003, GSI Report 2004-1, 224 (2004).
A. Rytz, At. Data Nucl. Data Tables 47, 205 (1991).
S. Richter, W. Barth, Proceedings of the 8th European Particle Accelerator Conference, Paris, France, 2002 (2002) p. 1181.
J. Kratz, private communication (2010).
A.G. Popeko, O.N. Malyshev, A.V. Yeremin, S. Hofmann, Nucl. Instrum. Methods Phys. Res. A 427, 166 (1999).
S. Saro, R. Janik, S. Hofmann, H. Folger, F.P. Heßberger, V. Ninov, H.J. Schött, A.N. Andreyev, A.P. Kabachenko, A.G. Popeko, A.V. Yeremin, Nucl. Instrum. Methods Phys. Res. A 381, 520 (1996).
T.A. Carlson, C.W. Nestor, jr., At. Data Nucl. Data Tables 19, 153 (1977).
S. Hofmann, G. Münzenberg, K. Valli, F.P. Heßberger, J.R.H. Schneider, P. Armbruster, B. Thuma, Y. Eyal, GSI Scientific Report 1981, 241 (1982).
I. Perlman, F. Asaro, A. Ghiorso, A. Larsh, R. Latimer, Phys. Rev. 127, 917 (1962).
S. Hofmann, G. Münzenberg, F.P. Heßberger, H.J. Schött, Nucl. Instrum. Meth. Phys. Res. 223, 312 (1984).
I.V. Zagrebaev, Nucl. Phys. A 734, 164 (2004).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Rev. C 69, 054607 (2004).
K.H. Schmidt, C.C. Sahm, K. Pielenz, H.G. Clerc, Z. Phys. A 316, 19 (1984).
S. Hofmann, S. Heinz, R. Mann, J. Maurer, J. Khuyagbaatar, D. Ackermann, S. Antalic, W. Barth, M. Block, H.G. Burkhard, GSI Annual Report 2010, GSI Report 2011-1, 197 (2011).
S. Heinz et al., Eur. Phys. J. A 48, 32 (2012).
Yu.Ts. Oganessian, A.V. Yeremin, A.G. Popeko, S.L. Bogomolov, G.V. Buklanov, M.L. Chelnokov, V.I. Chepigin, B.N. Gikal, V.A. Gorshkov, G.G. Gulbekian et al., Nature 400, 242 (1999).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Rev. Lett. 83, 3154 (1999).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal et al., Phys. Rev. C 62, 041604 (2000).
A. Sobiczewski, I. Muntian, Z. Patyk, Phys. Rev. C 63, 034306 (2001).
P. Möller, J.R. Nix, W.D. Myers, W.J. Swiatecki, At. Data Nucl. Data Tables 59, 185 (1995).
R. Smolanczuk, J. Skalski, A. Sobiczewski, Phys. Rev. C 52, 1871 (1995).
S. Cwiok, W. Nazarewicz, P.H. Heenen, Phys. Rev. Lett. 83, 1108 (1999).
D.C. Hoffman, Nucl. Phys. A 502, 21c (1989).
S. Cwiok, P.H. Heenen, W. Nazarewicz, Nature 433, 705 (2005).
M. Bender, K. Rutz, P.-G. Reinhard, J.A. Maruhn, W. Greiner, Phys. Rev. C 60, 034304 (1999).
M. Bender, Phys. Rev. C 61, 031302(R) (2000).
S. Cwiok, S. Hofmann, W. Nazarewicz, Nucl. Phys. A 573, 356 (1994).
J.O. Rasmussen, Phys. Rev. 113, 1593 (1959).
G. Igo, Phys. Rev. 115, 1665 (1959).
A. Parkhomenko, A. Sobiczewski, Acta Phys. Pol. B 36, 3095 (2005).
R. Smolanczuk, Phys. Rev. C 56, 812 (1997).
P. Möller, A.J. Sierk, T. Ichikawa, A. Iwamoto, R. Bengtsson, H. Uhrenholt, S. Åberg, Phys. Rev. C 79, 064304 (2009).
Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, R.N. Sagaidak, I.V. Shirokovsky, Yu.S. Tsyganov, A.A. Voinov, G.G. Gulbekian et al., Phys. Rev. C 74, 044602 (2006).
I. Muntian, S. Hofmann, Z. Patyk, A. Sobiczewski, Acta Phys. Pol. B 34, 2073 (2003).
I. Muntian, Z. Patyk, A. Sobiczewski, Phys. At. Nucl. 66, 1015 (2003).
P. Möller et al., At. Data Nucl. Data Tables 66, 131 (1997).
S. Liran, A. Marinov, N. Zeldes, Phys. Rev. C 63, 017302 (2000) arXiv:nucl-th/0102055.
K. Siwek-Wilczynska, T. Cap, J. Wilczynski, Int. J. Mod. Phys. E 19, 500 (2010).
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by J. Äystö
This paper is dedicated to A. Sobiczewski on the occasion of his 80th birthday
Rights and permissions
About this article
Cite this article
Hofmann, S., Heinz, S., Mann, R. et al. The reaction 48Ca + 248Cm → 296116* studied at the GSI-SHIP. Eur. Phys. J. A 48, 62 (2012). https://doi.org/10.1140/epja/i2012-12062-1
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1140/epja/i2012-12062-1