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Article
Mass and Γ3π0/Γγγ decay branching ratio of theη-meson from the p(γ, η)p reaction
Near threshold photoproduction ofη-mesons from the proton has been measured at the MAMI accelerator with the TAPS spectrometer. The mass of theη-meson was deduced from the threshold energy forη-photoproduction. T...
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Article
Evidence for a two-phonon octupole vibrational state in208Pb
Collective properties of206,208Pb have been investigated with gamma-ray spectroscopy using nuclear and electromagnetic excitation by208Pb projectiles. From the measurement of particle-particle-γ and particle-part...
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Article
Total decay-energy measurement in the fusion reactions90Zr(89Y,p)178Pt and90Zr(89Y, α)175Ir
In the fusion reactions90Zr(89Y,p)178Pt and90Zr(89Y,α)175Ir the sum energy of all emittedγ rays as well as the energy of the promptly emitted charged particle were measured. From these data the mass-excess values...
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Article
β +-endpoint measurements near100Sn and146Gd
With a summation-free β+-endpoint spectrometer the β+-decay energies of104Sn,147Tb,148, 149Dy,149Ho,150Er, and151Tm were remeasured with improved accuracy. Combined with known proton and alpha decay energies, the...
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Article
Neutral meson production in relativistic heavy ion collisions
The production ofπ 0 andη mesons has been studied in the reactions20Ne +Al at 350 MeV/u and40Ar + Ca at 1.0 GeV/u. Rapidity distributions and transverse momentum spectra have been measured and are compared to the...
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Article
Large electron polarization of H-like20Ne-ions traversing gd foils at very high velocities
It is shown that transient magnetic fields in Gd-host for20Ne ions at a mean velocity of 12.5v0(v0=c/137), considerably beyond the Bohr velocity of 1s electrons of Ne ions (v1s=10v0), are dominated by the Fermi c...
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Article
Decay of the compound nucleus179Au formed in the cold fusion reaction90Zr+89Y
For the compound nucleus179Au formed at an excitation energy of 26 MeV in the fusion reaction90Zr+89Y, the energy spectra of promptly emitted protons,α particles andγ rays were measured in concidence with the eva...
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Article
Measurement ofg-factors in160Yb by aγ-γ coincidence technique
Aγ-γ coincidence technique has been developed forg-factor measurements of short-lived nuclear states. The method involvesγ-detection in 4π geometry as well as transient magnetic fields and the recoil-distance tec...
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Article
Neutral pion production at 350 MeV/u in the system20Ne +27Al
π0 -production probability of (9± 2)· 10− 3 per20Ne+Al reaction has been measured at 350 MeV/u using the Two Arm Photon Spectrometer TAPS. This yield is consistent with an interpolation of published π-production ...
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Article
Coulomb excitation of230Th with32S,84Kr and142Nd projectiles
The Coulomb excitation measurements for the230Th nucleus with32S,84Kr and142Nd projectiles are presented. The use of different projectiles allowed us to get information in the ground-state band and side bands. Th...
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Article
In-beam spectroscopy of224Th
A rotational band with states of alternating parity has been populated in224Th via the208Pb(18O, 2n) reaction. Spins up to Iπ=10>+ (11−) are identified. Stretched El and E2 transitions compete in the deexcitation...
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Article
Evidence for nuclear shape coexistence in180Hg
Theγ decay in the radiative fusion reaction90Zr+90Zr→180Hg+xγ has been observed in an array of NaI detectors. States up to 6+ in the yrast sequence of180Hg are tentatively assigned and suggest the coexistence of ...
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Article
Spectroscopy of221Th
A positive and a negative parity band in221Th have been investigated via the208Pb(16O, 3n)221Th reaction. Strong E1 transitions compete with stretched E2 transitions deexciting levels of alternating parity. The m...
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Article
High-j proton and neutron alignment in the odd actinides235U and237Np
The investigation of the odd-neutron nucleus235U and odd-proton nucleus237Np provides the possibility to study separately the alignment effects in thei 13/2 proton andj 15/2 neutron intruder states in the actinid...
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Article
Rotational band crossings in the actinides
In the actinides bothi 13/2 protons andj 15/2 neutrons are close to the Fermi surface. At rapid rotation these high-j particles will unpair and align their orbital angular momentum along the axis of rotation givi...
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Article
Gamma-spectroscopy within the island of high-spin isomers nearN=82
A NaI sum-spectrometer combined with Ge-counters has been used to characterize the members of the island of high spin isomers nearN=82. On the basis of half lives, totalγ-decay energies and discreteγ-lines, assig...