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Decay of dinuclear systems formed from dubnium

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Abstract

The radioactivity of the superheavy nuclei \(^{250-275}\)Db is studied and presented using the Coulomb and proximity potentials. The half-lives corresponding to different decay modes such as \(\alpha \), cluster decay (\(^{12}\)C, \(^{14}\)N, \(^{18,20}\)O, \(^{23}\)F, \(^{20}\)Ne, \(^{34}\)S, \(^{28}\)Mg and \(^{40}\)Ca) and spontaneous fission in the superheavy nuclei \(^{250-275}\)Db are studied. The studied half-lives are compared with the available experiments. The decay modes and the branching ratios of isotopes of dubnium are presented. The isotopes of dubnium, \(^{254-263}\)Db, are identified as \(\alpha \) emitters, whereas isotopes such as \(^{250-253}\)Db and \(^{264-275}\)Db are identified as having spontaneous fission. The identified alpha emitting isotopes of dubnium have decay energies from 6 MeV to 10 MeV and half-lives 1 ms to 100 s. The possible projectile–target combinations to synthesise the superheavy nuclei \(^{253-263}\)Db were predicted. The fusion of spherical projectile and target yields larger evaporation residue cross-sections.

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Authors and Affiliations

  1. Department of Physics, Government College for Women, Kolar , 563 101, India

    A M Nagaraja, H C Manjunatha, N Sowmya & P S Damodara Gupta

  2. Department of Physics, St. Joseph’s College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli , 620 002, India

    A M Nagaraja & S Alfred Cecil Raj

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  1. A M Nagaraja
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Nagaraja, A.M., Manjunatha, H.C., Sowmya, N. et al. Decay of dinuclear systems formed from dubnium. Pramana - J Phys 95, 194 (2021). https://doi.org/10.1007/s12043-021-02228-4

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