A study of the reactions U238(d,p)U239 and U235(d,p)U236

Macefield, B.E.F.; Middleton, R.

doi:10.1016/0029-5582(64)90032-x

Cited by 30 publications

(5 citation statements)

References 13 publications

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“…In the (d,p) reaction [1,2] 37 levels have been observed below 1.7 MeV with a pronounced gap between 200 and 700 keV. This gap was ascribed to the particular stability associated with the semi-magic N= 152 shell.…”

Section: Introductionmentioning

confidence: 90%

Study of the level structure of239U using the thermal neutron capture reaction

et al. 1978

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Section: Introductionmentioning

confidence: 90%

Study of the level structure of239U using the thermal neutron capture reaction

et al. 1978

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“…[2][3][4] However, the short half-life restricts its applicability to laboratories not too far from a reactor. We would like to point out that despite the smaller effect obtained with sources of the 33-day activity, this activity can be used to good advantage in many cases.…”

Section: Relative Merits Of the 33-day Te 129w And 70-min Te 129 Actimentioning

confidence: 99%

“…So far only a few angular distributions have been published, [1][2][3][4] and none of these have been compared with the predictions of the distorted-wave Born approximation (DWBA) theory utilizing measured distortion parameters. In view of the large static deformation of the rare-earth and the actinide nuclei, such a test of the DWBA theory seems of interest, since one might expect inelastic-scattering (strong coupling)…”

Section: Introductionmentioning

confidence: 99%

27.7-keV Level inI129and Some Remarks about Its Use in Mössbauer Experiments

Sanders

Waard

1966

Phys. Rev.

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The properties of the first excited state of I m have been studied with a mass-separated Te 129m source. The energy of this state, as determined from the conversion-electron spectrum, is JS 7 =27.72d=0.06 keV. This differs considerably from the often quoted value of 26.8 keV, but it agrees very well with the value recently published by Bemis and Fransson. An accurate half-life value ri/ 2 =16.8±0.2 nsec was determined from delayed /3e~ coincidences. A total conversion coefficient a=5.3±0.3 was obtained from the relative intensities of the 27.7-keV gamma rays and the 27.4-keV x rays that accompany the isomeric transition in Te m . The contributions of these rays were separated by comparing Mossbauer spectra obtained with the 70-min and 33-day activities of Te 129 . Some remarks are made about the relative merits of these activities for use in Mossbauer sources.

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“…Therefore, vii(r) = dfi(r)/dR 9 (4.46) and the radial integrals in (4. 41 where the generalized single-particle stripping amplitude is given by It is emphasized here that (4.51) is an approximation to a first-order theory. This expression for T dp is closely analogous to Eq.…”

Section: Approximate First-order Amplitudementioning

confidence: 99%

Deuteron Stripping on Deformed Nuclei

Iano

Austern

1966

Phys. Rev.

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Interference of indirect transition amplitudes with the direct transition amplitude for deuteron stripping on deformed nuclei is investigated. The indirect transitions that are considered are those that arise via intermediate rotational excitations of the target and product nuclei. These indirect transitions are introduced by generalizing the initial and final distorted waves so that they include inelastic amplitudes. A straightforward coupled-channel treatment of the generalized distorted waves is described. However, a quantitative investigation of the coupled-channel formulation is not attempted because of the enormous numerical difficulties that such a procedure would present. Instead, the rotational motion of the target is treated adiabatically; thereby, in principle, inelastic amplitudes in all rotational channels are accounted for simultaneously. Further simplification is achieved by treating the coupling of the rotational coordinates to the projectile coordinates only to first order. Calculations are performed for deuteron stripping on Mg 24 and U 238 . The calculations indicate that: (a) the indirect amplitudes are small; (b) the indirect amplitudes are affected more strongly by intermediate excitations in the deuteron channel than by intermediate excitations in the proton channel; (c) the indirect amplitudes generally flatten the angular distributions of the reaction protons; and (d) the ratio of the strength of the indirect transitions to that of the direct transition is fairly independent of the mass of the target.Although the spin-orbit force is neglected, the theory predicts a / dependence in the angular distributions that is significant at all angles. The indirect stripping amplitudes are small; however, they produce measurable effects in the differential cross section when they add coherently to the direct amplitude. The most dramatic effects of the indirect amplitudes are changes of the angular distributions of the reaction protons. In addition, the calculated spectroscopic coefficients are changed by a significant amount when the indirect amplitudes are taken into account.

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A study of the reactions U238(d,p)U239 and U235(d,p)U236

Cited by 30 publications

References 13 publications

Study of the level structure of239U using the thermal neutron capture reaction

Study of the level structure of239U using the thermal neutron capture reaction

27.7-keV Level inI129and Some Remarks about Its Use in Mössbauer Experiments

Deuteron Stripping on Deformed Nuclei

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