42 Result(s)
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Article
Energy inversion of thef 7/2 andh 9/2 neutrons in yrast states of154Yb
The N=84 nucleus154Yb was investigated through the106Cd(54Fe,α2p) reaction. We found the 16+ yrast level in this nucleus to be formed by the (πh11/2 2 νf7/2h9/2) configuration, in contrast to the lower-Z isotones...
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Article
Radioactive125Sb and60Co in “ruthenium” hot particles from Chernobyl fallout
The previously analyzed “ruthenium” particles from the Chernobyl fallout in Poland have been reexamined in a search for long-lived radioactive components. The established presence of125Sb and60Co reopens the ques...
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Article
New 19/2+ isomers in119Sn,121Sn and123Sn
Yrast 19/2+ isomers in119Sn,121Sn and123Sn with half-lives in the 5–10 μs range have been identified byγ-ray spectroscopy following122,124Sn + 344 MeV80Se reactions (∼15% above the Coulomb barrier).Isomeric decay...
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Article
On the origin of the 2485 keVγ-ray observed in near-barrier collisions of various heavy ions with208Pb
In collisions of64Ni and82Se projectiles with a thick208Pb target at energies around 10% above the static Coulomb barrier a 2485 keV Y-ray is observed, which is in conspicuous agreement with the recently reported...
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Article
Mass and charge release by the evaporation of particles from compound nuclei around mass 60
Reaction product cross sections have been measured for reactions of4He projectile with54,56Fe,58Ni and59Co targets in the bombarding energy range 14–27 MeV. The cross-section-weighted average charge ...
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Article
Decays of millisecond isomers in odd-oddN=81 nuclei146Tb,148Ho and150Tm
Following reactions induced by 245 MeV60Ni ions, isomers have been identified in the odd-oddN=81 isotones146Tb,148Ho and150Tm with half-lives of 1.18(2), 2.35(4) and 5.2(3) ms, respectively. Their decays have bee...
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Article
Long lived isotopes in the Chernobyl radioactive cloud at Cracow
The analysis of the residual γ-radioactivity in the air filters exposed during the passage of the Chernobyl radioactive could over Cracow area gave data on variation in time of the relative contribution of lon...
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Article
The two particle-phonon multiplet πh 11/2 νf 7/2 × 3− and higher-lying four-nucleon yrast states in the doubly-odd nucleus 146 63 Eu83
From in-beamγ-ray measurements we have established the high-spin states in146Eu up to 3.5 MeV excitation andI π=(15+). The highest levels observed are formed by alignment of four nucleons, involving excitation of...
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Article
Decays of \((vh_{11/2} ^n )^{10 + } \) and \((\pi d_{5/2} vh_{11/2} ^n )^{25/2 + } \) isomers in even-A Sn and odd-A Sb nuclei
Isomeric decays in116, 118, 120Sn and119, 120Sb have been studied by measurements of delayedγ-rays following reactions of 26–40 MeV7Li ions on Cd targets. A 6.3 μs isomer of
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Article
Level structure of 68 149 Er81 and high-spin isomerism in proton-richN=81, 82, 83 nuclei
The level structure of theN=81 nucleus149Er has been studied by γ-ray spectroscopy following the reaction92Mo+255 MeV60Ni. Yrast levels in149Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric s...
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Article
Level structure of proton-richN=83 Nuclei150Ho and152Tm
The yrast levels of theN=83 odd-odd nuclei150Ho and152Tm have been studied byγ-ray spectroscopy following reactions induced by 240–250 MeV60Ni ions. Isomers have been identified in150Ho at 1.096, 2.625 and ∼8.0 M...
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Article
Two-proton neutron-hole yrast excitations in 66 147 Dy81
The level structure of theN=81 nucleus147Dy has been studied byγ-ray spectroscopy following reactions of 230–250 MeV58,60Ni beams on89Y and90,92Zr targets. Yrast and near-yrast levels in147Dy above the known 59-s...
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Article
(πh11/2vh11/2 −1) 10+ isomers in N=81 nuclei146Tb,148Ho, and150Tm
Millisecond isomers in146Tb,148Ho and150Tm, observed in60Ni reactions on39Y,90Zr, and92Mo targets, are interpreted as (πh11/2 vh11/2 −1) 10+ isomers predicted by the shell model. Their decays are characterized.
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Article
The decay of the 560 ns Isomer at 8.6 MeV in 64 147 Gd83
In (α,xn) and (12C, 5n) in-beamγ-ray experiments with pulsed beams the decay of the 560 ns high-spin isomer in147Gd has been investigated. Extensive coincidence measurements identified in the isomeric decay more ...
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Article
The 235 ns 9+ isomer in 63 148 Eu85
From (p, xn) in-beamγ-ray and electron measurements aT 1/2=235(14) ns isomer at 720 keV was identified in 63 148 Eu85 and the levels populated in its decay have...
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Article
Protonh 2 11/2 and octupole excitations in148 66Dy82 and149 66Dy83
The yrast states of148Dy and149Dy have been studied by γ-ray and conversion electron measurements in (α, xn) and (16O,xn) reactions on enriched152Gd and135Ce targets. Level schemes to above 4 MeV for the two nucl...
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Article
The 235 μs 9+ isomer in 63 146 Eu83
Through (p,2n) in-beam γ and e− measurements the excitation of the 235 μs 9+ isomer in146Eu has been determined to be 666.3 keV. High spin members of the πd 5 2/−1 ...
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Article
Particle hole yrast states in146Gd and147Gd and the Z=64 shell closure
The level structures of146Gd and147Gd have been investigated by in-beamγ-ray ande − spectroscopy with (α, xn) reactions on enriched Sm targets. Detailed level schemes up to ∼4 MeV, which differ radically from ear...
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Article
Particle plus octupoleM2/E3 isomers and high-spin particle-hole states in147Tb and148Tb
The level structures of theN=82 andN=83 nuclei147Tb and148Tb have been studied by means of (α, 8n) and (α,7n) reactions induced by 68 to 110 MeVα particle bombardments of151Eu targets. In-beam conversion electron...
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Article
Production of high multiplicity yrast isomers in147Gd and146Gd in a-particle induced reactions
High spin isomers in 147 Gd and 146 Gd have been produced in (α, xn)reactions, and their half-lives, excitation energies and maximum spins have been determined. It is proposed that these isomers are identical wi...
