Abstract:
Radium isotopes with mass numbers from 209 to 212 have been produced by heavy-ion fusion reactions 204Pb( 12C, xn) 216-Ra. Radioactive decay properties were investigated by means of α- and α-γ-spectroscopy after in-flight separation of the evaporation residues from the projectile beam by the velocity filter SHIP and implantation into a 16-strip position-sensitive Si detector. For the even-even nuclei 210,212Ra we identified α transitions into the first-excited 2+-state of the daughter nuclei 206,208Rn. Weak α transitions into excited levels of the odd-A daughter nuclei 205,207Rn were also observed.
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Received: 19 August 2002 / Accepted: 6 November 2002 / Published online: 18 February 2003
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Communicated by D. Guerreau
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Heßberger, F., Hofmann, S. & Ackermann, D. Fine structure in the α-decay of radium isotopes with mass numbers 209-212. Eur Phys J A 16, 365–370 (2003). https://doi.org/10.1140/epja/i2002-10111-0
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DOI: https://doi.org/10.1140/epja/i2002-10111-0