Nuclear Data Sheets for A = 90

Kocher, D.C.

doi:10.1016/s0090-3752(75)80053-6

Cited by 69 publications

(2 citation statements)

References 171 publications

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“…The energy Ep of a proton from the 9~176 reaction exciting a final state whose analogue lies at an excitation energy E* in 9~ can be calculated from energy balance. Using E*=13.1MeV [11] for the 9~ analogue of the 90y ground state, and Q= -1.5 MeV [12] for the ground state -ground state transition, we find that for 21.8 MeV incident neutron energy Ep= 33.4-E* MeV.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Excitation of the analogue of the T> giant dipole resonance of90Zr via the (n, p) reaction

1984

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Proton spectra have been measured at lab angles of 0=0 ~ to 100 ~ for the reaction Zr(n,p)Y at 21.8 MeV incident neutron energy. Spectra over an angular spread of 80 ~ were accumulated simultaneously using a detection system consisting of proportional counter AE detectors and a curved plastic scintillator as energy detector. Resonant behaviour is observed in the proton spectra for the Zr(n,p)Y reaction but not for the Fe(n,p)Mn reaction. The resonant structure is attributed to the excitation of the analogues of T> giant dipole states of Zr. The resonant structure is shown to correspond in position, gross and fine structure, and, in strength and angular dependence of the cross sections, with expectations for the 9~176 reaction. DWBA cross sections are derived and fitted to the experimental data with a Lane potential of 150 MeV.

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Section: Analysis and Discussionmentioning

confidence: 99%

Excitation of the analogue of the T> giant dipole resonance of90Zr via the (n, p) reaction

1984

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“…When combining the possible single particle coupling modes with seniority v = 8, one finds, that I= 24 h is the excitation limit below the N=Z=50 shell gap. For example, I~=24 + is reached with the configuration [re (1 g9/2) 4, 7/" (2p3/2)-1, one should note that at spin 23 h the proton separation energy for this nuclide (6.46 MeV, [49]) is already exceeded by a factor of two and the neutron separation limit of 13.2 MeV [49] is almost reached. So particle evaporation at such excitation energies may well be expected.…”

Section: Iva Shell Model Calculationsmentioning

confidence: 99%

A study of high spin states in the transitional nucleus90Mo

Kabadiyski

Cristancho

Gross

et al. 1992

Z. Physik A - Hadrons and Nuclei

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The reaction 58Ni(36Ar, 4p)9~has been studied at a beam energy of 149 MeV. A detector array consisting of the OSIRIS spectrometer (12 Compton-suppressed Ge detectors), four charged-particle AE detectors and seven NE-213 neutron detectors at the VICKSI accelerator in Berlin has been used to measure the gamma radiation in 77-and particle-77-coincidence mode. An additional Ge detector was placed at 162 ~ to the beam direction to provide information on DCO ratios. The level scheme of 9~ has been extended up to an excitation energy of about 12 MeV and probable spin 23ta. Some 70 transitions and 40 levels have been newly identified. Spin assignments have been proposed on the basis of measured DCO ratios. Shell model calculations in a model space consisting of the proton lf5/2, 2p3/2, 2pl/2, and 1 g9/2 orbits and the neutron 2pl/2, 1 g9/2, 1 g7/2, 2 d5/2, 2d3/a, and 3 Sl/2 orbits with some truncation were made for states above 9h and the predicted structure of these states is discussed.

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Near-barrier transfer and fusion of the systems33S +90,91,92Zr

Corradi

Skorka

Lenz

et al. 1990

Z. Physik A - Atomic Nuclei

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Double differential cross sections of all prominent transfer channels have been measured in the systems 338+9~ at two energies close to the nominal Coulomb barrier. In addition the fusion excitation functions of these systems have been measured below and around the barrier. The angular-and Q-distributions of the most important transfer reactions have been analysed in the framework of a simple semiclassical formalism. Particularly the two-nucleon transfer angular distributions exhibit strong multi step coupling effects which manifest themselves in reduced cross sections at large angles corresponding to close distances. From the angular distributions at forward angles, where a single step character of the transfer reaction can be assumed, approximate form factors have been extracted employing a first order perturbation theory. Within the uncertainties of a schematic coupled channels calculation the isotopic differences of the sub-barrier fusion enhancement can be understood on the basis of the isotopic differences of the transfer form factors and Q-values.

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Nuclear Data Sheets for A = 90

Cited by 69 publications

References 171 publications

Excitation of the analogue of the T> giant dipole resonance of90Zr via the (n, p) reaction

Excitation of the analogue of the T> giant dipole resonance of90Zr via the (n, p) reaction

A study of high spin states in the transitional nucleus90Mo

Near-barrier transfer and fusion of the systems33S +90,91,92Zr

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