Abstract.
An in-beam study of the transfermium nucleus 252No has been performed using the JUROSPHERE II array of germanium detectors coupled to the gas-filled recoil separator RITU. A new technique of recoil-fission tagging was used to extract tagged γ-ray data. Having significant spontaneous fission and α-decay branches, 252No is an ideal candidate for a comparative study. In a similar manner to α-decay tagging the fission events can be used to obtain γ-ray data. The recoil-fission tagged γ-ray spectrum showed a similar structure to the α-decay tagged γ-ray spectrum. By comparing the α-tagged and fission-tagged spectra and decay curves, it was shown that the spontaneous fission originates from the same initial state as the α decay. This extension of the tagging method allows in-beam spectroscopic data to be obtained from heavy nuclei with significant spontaneous-fission branches.
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References
Yu.Ts. Oganessian, Phys. Rev. C 70, 064609 (2004).
W.D. Myers, W.J. Swiatecki, Nucl. Phys. 81, 1 (1966).
R.S. Simon, Z. Phys. A 325, 197 (1986).
E.S. Paul, Phys. Rev. C 51, 78 (1995).
S. Eeckhaudt, Eur. Phys. J. A 26, 227 (2005).
R.-D. Herzberg, J. Phys. G 30, R123 (2004).
P.T. Greenlees, Eur. Phys. J. A 20, 87 (2003).
P.T. Greenlees, to be published.
F.P. Heßberger, Z. Phys. A 359, 415 (1997).
R.-D. Herzberg, Phys. Rev. C 65, 014303 (2001).
C.E. Bemis jr., Phys. Rev. C 15, 705 (1977).
M.E. Leino, Nucl. Instrum. Methods B 99, 653 (1995).
C.W. Beausang, Nucl. Instrum. Methods A 313, 37 (1992).
B. Herskind, Nucl. Phys. A 447, 395 (1985).
P.J. Nolan, D.W. Gifford, P.J. Twin, Nucl. Instrum. Methods A 236, 95 (1985).
F.P. Heßberger, Int. J. Mod. Phys. 15, 284 (2006).
A. Robinson, to be published.
A.N. Andreyev, Z. Phys. A 345, 389 (1993).
A.V. Belozerov, Eur. Phys. J. 16, 447 (2003).
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D. Schwalm
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Leppänen, A.P., Uusitalo, J., Greenlees, P.T. et al. Recoil-fission tagging of the transfermium nucleus 252No. Eur. Phys. J. A 28, 301–306 (2006). https://doi.org/10.1140/epja/i2006-10056-2
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DOI: https://doi.org/10.1140/epja/i2006-10056-2