Super-allowed alpha-decay above doubly-magic 100Sn and properties of 104Te = 100Sn otimes alpha

Abstract

Alpha-decay half-lives for 104,105,106Te and 108,109,110Xe close above the doubly-magic 100Sn are calculated from systematic double-folding potentials. The derived alpha preformation factors are compared to results for 212,213,214Po and 216,217,218Rn above the doubly-magic 208Pb. Alpha-decay energies of Q_alpha = 5.42 \pm 0.07 MeV and 4.65 \pm 0.15 MeV are predicted for 104Te and 108Xe; the corresponding half-lives are T_{1/2} approx 5 ns for 104Te and of the order of 60 μs for 108Xe. Additionally, the properties of rotational bands in 104Te are analyzed, and the first excited 2+ state in 104Te is predicted at E_x = 650 \pm 40 keV; it decays preferentially by gamma emission with a reduced transition strength of 10 Weisskopf units to the ground state of 104Te and with a minor branch by alpha emission to the ground state of 100Sn.

arXiv comment6 pages, 3 figures, to appear in Europ. Phys. J. A; two misprints in Tables 1 and 3 corrected

References in corpus (7)

• Nuclear Ground-State Masses and Deformations
• Microscopic mass formulae
• alpha-nucleus potentials, alpha-decay half-lives, and shell closures for superheavy nuclei
• alpha-nucleus potentials for the neutron-deficient p nuclei
• ${}^{92}$Mo($\alpha ,\alpha$)${}^{92}$Mo scattering,the ${}^{92}$Mo--$\alpha$ optical potential, and the ${}^{96}$Ru($\gamma ,\alpha$)${}^{92}$Mo reaction rate at astrophysically relevant energies
• Elastic alpha-scattering of 112Sn and 124Sn at astrophysically relevant energies
• Half-lives of $\alpha$-emitters approaching the N=Z line

Cited by in corpus (15)

• Radioactive decays at limits of nuclear stability
• Alpha Decay in the Complex Energy Shell Model
• Photon-induced Nucleosynthesis: Current Problems and Experimental Approaches
• Quantum time scales in alpha tunneling
• α-Decay in Ultra-Intense Laser Fields
• $\alpha$-cluster structure above double-shell closures and $\alpha$-decay of ${}^{104}$Te
• $\alpha$ Clustering slightly above ${}^{100}$Sn in the Light of the New Experimental Data on the Superallowed $\alpha$ Decay
• $\alpha$-cluster states in ${}^{46,54}$Cr from double-folding potentials
• Pairing gaps and Fermi energies at scission for 296Lv alpha-decay
• $\alpha$-cluster structures above double shell closures via double-folding potentials from chiral effective field theory
• Cross sections at sub-Coulomb energies: full optical model vs.\ barrier transmission for ${}^{40}$Ca + $\alpha$
• $\alpha$ + core structure described with an additional interaction in the nuclear matter saturation region
• On the Bohr-Sommerfeld quantization condition and assault frequency in a semiclassical model for α decay
• Yrast band in the heavy $N=Z$ nucleus ${}^{88}$Ru: $\alpha$-cluster approach
• $\alpha$ + ${}^{92}$Zr cluster structure in ${}^{96}$Mo