Identification of the New Isotope ^{244}Md.

Autor: Pore JL; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Gates JM; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Orford R; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Campbell CM; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Clark RM; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Crawford HL; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Esker NE; Department of Chemistry, San José State University, One Washington Square, San José, California 95192, USA., Fallon P; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Gooding JA; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA.; Department of Physics, Lund University, SE-22100 Lund, Sweden., Kwarsick JT; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Macchiavelli AO; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Morse C; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Rudolph D; Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA., Såmark-Roth A; Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA., Santamaria C; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA., Shah RS; Department of Physics, Lund University, SE-22100 Lund, Sweden., Stoyer MA; Nuclear Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA.; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2020 Jun 26; Vol. 124 (25), pp. 252502.
DOI: 10.1103/PhysRevLett.124.252502
Abstrakt: In an experiment performed at Lawrence Berkeley National Laboratory's 88-inch cyclotron, the isotope ^{244}Md was produced in the ^{209}Bi(^{40}Ar,5n) reaction. Decay properties of ^{244}Md were measured at the focal plane of the Berkeley Gas-filled Separator, and the mass number assignment of A=244 was confirmed with the apparatus for the identification of nuclide A. The isotope ^{244}Md is reported to have one, possibly two, α-decaying states with α energies of 8.66(2) and 8.31(2) MeV and half-lives of 0.4_{-0.1}^{+0.4} and ∼6  s, respectively. Additionally, first evidence of the α decay of ^{236}Bk was observed and is reported.
Databáze: MEDLINE
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