Abstract
The neutron-deficient isotopes226Np and227Np were produced in the bombardment of a 380μg/cm2 209Bi target with22Ne projectiles at an incident beam energy of 5.5 MeV/u. They were identified using the α-α time-correlation method /1/.226Np was found to decay with Eα=(8044±20) keV andT 1/2=(31±8) ms. For227Np two α-lines were observed at (7650±20) keV and (7677±20) keV with a half-life of (510±60) ms. The gas-filled separator NASE installed at GSI Darmstadt was used to separate the evaporation residues inflight.
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References
K.-H.Schmidt et al., Nucl.Phys.A318,260(1979)
P.Möller, J.R.Nix, ADNDT,39(1988)
S.Liran, N.Zeldes, ADNDT, 17,476(1976)
D.N.Poenaru et al., Jour.Phys.Lett. 41,589(1980)
J.Rasmussen, Phys.Rev. 115,1675(1959)
F.P.Heßberger et al. Z. Phys. A 333,111(1989)
A.N.Andreev et al.,JINR P7-88-830,Dubna(1988)
V.Ninov et al. GSI-89-1,327(1989)
W.Reisdorf, Z. Phys A, A300,227(1981)
A.N.Andreev, Int. School Sem., Dubna, Oct.1989