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Attempt to synthesize the proton-unbound $$^{182,183}$$Bi isotopes

Huang, H.*; Andreyev, A. N.; 他37名*

Huang, H.*; Andreyev, A. N.; 37 of others*

The near-symmetric complete fusion reaction $$^{78}$$Kr+$$^{107}$$Ag=$$^{185}$$Bi$$^{*}$$ was studied at the gas-filled recoil separator SHANS with an attempt to synthesize the extremely neutron-deficient proton-unbound $$^{182,183}$$Bi isotopes. No decay events which could be attributed to them were observed. The two- and three-particle evaporation residues $$^{180,179}$$Hg ($$alpha p$$, $$alpha pn$$) and $$^{183,182}$$Pb($$pn$$,$$p2n$$) were identified. Based on the yields of 182,183Pb in the present work and the systematics of the ratios between the cross sections of $$p(x-1)n$$ and $$xn$$ evaporation channels for the most neutron-deficient odd-Z nuclei above lead, the upper limits for the half-lives of $$^{182,183}$$Bi were estimated to be less than 0.3$$mu$$s.

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パーセンタイル:74.11

分野:Physics, Nuclear

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