The competition between alpha decay and spontaneous fission in odd-even and odd-odd nuclei in the range 99 \leg Z \leg 129

Abstract

The predictions on the mode of decay of the odd-even and odd-odd isotopes of heavy and superheavy nuclei with Z = 99-129, in the range 228 \leg A \leg 336, have been done within the Coulomb and proximity potential model for deformed nuclei (CPPMDN). A comparison of our calculated alpha half lives with the values computed using other theoretical models shows good agreement with each other. An extensive study on the spontaneous fission half lives of all the isotopes under study has been performed to identify the long-lived isotopes in the mass region. The study reveals that the alpha decay half lives and the mode of decay of the isotopes with Z = 109, 111, 113, 115 and 117, evaluated using our formalisms, agrees well with the experimental observations. As our study on the odd-even and odd-odd isotopes of Z = 99-129 predicts that, the isotopes ${}^{238,240-254}$99, ${}^{244,246-258}$101, ${}^{248,250,252-260,262}$103, ${}^{254,256,258-262,264}$105, ${}^{258,260,262-264,266}$107, ${}^{262,264,266-274}$109, ${}^{266,268-279}$111, ${}^{270-284,286}$113, ${}^{272-289,291}$115, ${}^{274-299}$117, ${}^{276-307}$119, ${}^{281-314}$121, ${}^{287-320,322}$123, ${}^{295-325}$125, ${}^{302-327}$127 and ${}^{309-329}$129 survive fission and have alpha decay channel as the prominent mode of decay, these nuclei could possibly be synthesized in the laboratory and this could be of great interest to the experimentalists. The behaviour of these nuclei against the proton decay has also been studied to identify the probable proton emitters in this region of nuclei.

arXiv comment47 pages, 14 figures, to appear in Nuclear Physics A (2015)

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Cited by in corpus (6)

• Feasibility of observing the α decay chains from isotopes of SHN with Z = 128, Z = 126, Z = 124 and Z = 122
• $\alpha$-decay half-lives of superheavy nuclei with $Z=122-125$
• Two-proton radioactivity within Coulomb and proximity potential model
• Predictions on the alpha decay half lives of Superheavy nuclei with Z = 113 in the range 255 l.e. A l.e. 314
• Isotopic yield in cold binary fission of even-even ${}^{244-258}$Cf isotopes
• Predictions on the alpha decay chains of superheavy nuclei with Z =121 within the range 290 $\le$ A $\le$ 339