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91.
The analyzing power Ay(θ) for the 9Be(p, n)9B reaction was measured at seven energies between 8.1 to 15.0 MeV for reaction angles between 0° and 100° (c.m.). The Ay(θ) values are predominantly negative and exhibit a smooth variation with energy. The significance of these results in Lane optical- model calculations for the 9Be + nucleon system and in comparisons between the observables Py(θ) and Ay(θ) is indicated. 相似文献
92.
High-spin states of the N = 48 nucleus 90Mo have been studied using the 33 MeV 90Zr(3He, 3nγ) reaction. A previously unknown level structure above the 8+ isomer and several new lower-lying levels have been identified. The results are discussed in terms of shell-model calculations which allow four protons in the subshells and two neutron holes in the orbitals. 相似文献
93.
K.D. Hildenbrand R. Bock H.G. Bohlen P. Braun-munzinger D. Fick C.K. Gelbke Ursula Weiss W. Weiss 《Nuclear Physics A》1974,234(1):167-184
Angular distributions of the elastic scattering of 28Si on 29Si and 30Si have been measured for incident beam energies at E = 65 and 70 MeV with a time-of-flight spectrometer for heavy ions. At 70 MeV the neutron transfer 30Si(28Si, 29Si)29Si was observed in addition to the elastic channel. The pronounced oscillations in the elastic scattering distributions are interpreted as being due to an elastic transfer of neutrons between the colliding nuclei during the scattering process. This assumption is in accordance with some general features of the data and allows for the extraction of spectroscopic factors of the transferred neutrons. 相似文献
94.
The γ-decay from three fine-structure components of the 49Ca ground state analogue has been investigated. Angular distributions have been measured for the decay from the strongest component. Absolute γ-widths are found from the γ-spectra, and the proton and neutron widths from fits to the 48Ca(p, p) and (p, n) excitation functions. A group of eight states with Ex around 7 MeV is found to carry a significant part of the M1 strength. A comparison with the β-decay from 49Ca has been made. 相似文献
95.
The single-channel resonating-group method is used to study effects of the Pauli principle on 3He + 3H scattering. Comparison is made with previous similar calculations for d + 3He scattering, and it is found that the Pauli principle affects the s = 0 state of the 3He + 3H system rather similarly to the way it affects the s = 1 state, whereas the Pauli principle affects the state of the d + 3He system quite differently from the way it affects the state. Mention is made of the possibility of observing similar effects of the Pauli principle in other nuclear systems. 相似文献
96.
97.
N.S. Godwin W.D. Rae B. Cooke N.J. Eyre P.S. Fisher G. Proudfoot D. Sinclair 《Nuclear Physics A》1979,331(1):237-253
The reactions 17O(11B, 8Li)20Ne, 17O(12C, 9Be)20Ne and 17O(13C, 10B)20F have been studied using beams of 115 MeV 11B and 12C and 105 MeV 13C incident on a gas target. Shell-model calculations have been performed for 20Ne and 20F, for comparison with the experimental data. It is found that the data can be interpreted using the shell model spectroscopic factors and a semi-classical reaction theory. We justify the use of the latter by applying it to the cases of three-nucleon transfer on 16O. Spin assignments are suggested for previously unidentified states in 20F. 相似文献
98.
A search for γ-rays preceding isomeric fission in the reaction238U(α, 2n)240mPu yielded negative results. Upper limits are given for the number of unconverted photons per isomer formed. 相似文献
99.
The yields of isomeric states in 89Y, 115In and 197Au produced by the (γ, γ') reaction have been measured in the energy range 100–800 MeV by the activation method. From the yields the cross sections have been deduced. Large cross sections around the first pion resonance are found. The experimental results are compared to calculations based on the impulse approximation. 相似文献
100.
High-energy photon spectra were obtained with moderate resolution for a number of neighboring nuclei: 56Fe, 59Co, 58Ni, 60Ni, 61Ni, 63Cu and 64Zn in bombardments with protons (8 to 22 MeV). The shapes, magnitudes and energy dependence of the observed spectra are found to be consistent in most of their essential features with the implications of the semidirect model for fast nucleon capture. 相似文献