[Show abstract][Hide abstract] ABSTRACT: Heavy-ion one-neutron transfer reactions have been used to populate levels in 11B, 14C, 15N and 20F. The electromagnetic lifetimes of these levels have been measured using a form of the Doppler shift attenuation method.
[Show abstract][Hide abstract] ABSTRACT: The total cross sections of some heavy-ion one-neutron transfer reactions involving 13C, which lead to excited states of one of the final nuclei, have been measured at energies below the Coulomb barrier. Products of the neutron spectroscopic factors in the initial and final states have been extracted using a Coulomb wave Born approximation, and have been compared with theory.
[Show abstract][Hide abstract] ABSTRACT: The quadrupole interactions of the 2+ states of 182,184,186W have been studied by using time-integrated perturbed angular correlations after Coulomb excitation. The experiments have been performed by using 40-MeV 16O ions to implant the tungsten nuclei in zinc single crystals of hexagonal structure. A strong electric quadrupole interaction has been observed and the electric field gradient acting on W in Zn has been evaluated using values for the quadrupole moments derived from E2 transition probabilities and the rotational model.
[Show abstract][Hide abstract] ABSTRACT: The breakup of deuterons in the field of gold and lead nuclei was
investigated experimentally. Angular correlations were measured at a
deuteron energy of 12 MeV and, in the case of gold, also at 10.5 MeV.
Furthermore, the energy dependence of the breakup cross section was
studied with a gold target in the range lying between 7 and 12 MeV.
Comparison of the experimental results with theoretical predictions
based on a model which takes only Coulomb forces into account shows
large discrepancies, the reason for which is presumed to be due to
neglecting the nuclear interaction of the neutron in the final state.
Physical Review C 07/1973; 8(1):68-74. DOI:10.1103/PhysRevC.8.68 · 3.73 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The differential cross section σ0(θ) and the analysing powers iT11(θ), T20(θ), T21(θ) and T22(θ) of the reactions 2H(d, p)3H and 2H(d, n)3He have been measured. The 2H(d, p)3H reaction was measured at 9 energies between 3.0 and 11.5 MeV at lab angles between 7.5° and 160°. The reaction 2H(d, n)3He was measured at 10.0 and 11.5 MeV at c.m. angles ranging from 95° to 156°. The results were fitted with Legendre polynomials and the resulting coefficients analysed for possible resonances in 4He. Differences in the analysing powers between the 2H(d, p)3H and the 2H(d, n)3He reactions can be explained by Coulomb effects.
Nuclear Physics A 10/1972; 193(1-193):129-148. DOI:10.1016/0375-9474(72)90240-0 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The angular distributions of the analysing powers iT11(θ), T20(θ), T21(θ) and T22(θ) of the elastic scattering of polarized deuterons on deuterons have been measured at deuteron energies of 6.0, 8.0, 10.0 and 11.5 MeV. The vector component has small but non-zero values which change sign between 6.0 and 10.0 MeV. The tensor components have increasing values with increasing energy. The results are discussed in respect of resonances in 4He and a term scheme is proposed for a complete phase-shift analysis.
Nuclear Physics A 10/1972; 193(1):149-154. DOI:10.1016/0375-9474(72)90241-2 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: It is argued that the fast β− decay of 190Re involves the allowed unhindered transition in accord with a recent microscopic description of Kπ = 3− octupole excitations in the osmium region.
Nuclear Physics A 06/1972; 187(2):446–448. DOI:10.1016/0375-9474(72)90588-X · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The mechanism of the first step of a sequential decay reaction can be determined by a measurement of the angular correlations which in turn lead to the polarization of the unstable particle. This method has been applied to the reaction 12C(d, pn)12C; the first step is assumed to be a stripping reaction leading to a doublet of levels in 13N*. An analysis of the results in PWBA confirms this hypothesis, but the large discrepancies between this model and the measured angular distribution emphasize the importance of initial- and final-state interactions.
Nuclear Physics A 04/1972; 184(2):577-587. DOI:10.1016/0375-9474(72)90430-7 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Phase shifts of angular momenta l ≦ 3 for d-α elastic scattering were extracted from differential cross sections and the vector and tensor analysing powers of the scattering between 3 and 11.5 MeV. Good fits to all the experimental data analysed could be obtained and the total reaction cross section correctly predicted. Continuous extension of the phase shifts to lower and higher energies is possible, and the P-wave phase shifts are well fixed by the analysed data. Single-level parameters of the 2+ and 1+ (T = 0) resonances were determined. The coupling between the S- and D-waves for J = 1 was found to be very small. No alternative solution could be found from the data used in this analysis.
Nuclear Physics A 04/1972; 184(1-184):193-213. DOI:10.1016/0375-9474(72)90453-8 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The breakup of deuterons in the field of a gold nucleus has been measured at a deuteron energy of 12 MeV. The energy-angle correlations are compared with two different theoretical models which take into consideration only the Coulomb interaction.
Physics Letters B 04/1972; 39(2):191-192. DOI:10.1016/0370-2693(72)90771-X · 6.13 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The analysing powers T11 (theta), T20 (theta), T21 (theta) and T22 (theta) of the elastic scattering of polarized deuterons on 3Hehave been measured for six energies between 4.0 MeV and 11.5 MeV at c.m. angles between 30° and 160°. Strong variations of the angular distribution for all components are observed between 4.0 and 6.0 MeV which suggest that one or several levels in 5Li are excited by this reaction. At higher energies the analysing powers show strong similarities in the shape of the angular distribution to the d-4He elastic scattering.
Nuclear Physics A 04/1972; 185(1):263-267. DOI:10.1016/0375-9474(72)90567-2 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: We discuss the conjecture that a determination of the axis of symmetry in a sequential decay provides the necessary information to select the reaction mechanism. Experimental results and a distorted-wave Born approximation analysis are given for the reaction 12C(d,n)13N*(p)12C.
[Show abstract][Hide abstract] ABSTRACT: The analysing powers iT11, T20, T21 and T22 for the elastic scattering of polarized deuterons by protons have been measured at deuteron energies of 6, 8, 10 and 11.5 MeV with the polarized deuteron beam from a tandem accelerator. The measurements cover the c.m. angular range from 40° to 155° and show small but non-zero analysing powers at all energies.
Nuclear Physics A 01/1972; 180(2-180):593-599. DOI:10.1016/0375-9474(72)90881-0 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The differential cross section σ0(θ) and the analysing powers iT11(θ), T20(θ), T21(θ) and T22(θ) of the reaction 3He(d, p)4He have been measured for 7 energies between 2.8 MeV and 11.5 MeV at lab angles between 0° and 160°. The results were fitted with Legendre polynomials. The energy dependence of the resulting Legendre coefficients indicate resonance-like behaviour at energies corresponding to excitations of 16.6 MeV, 17.5 MeV, 20.0 MeV, 20.9 MeV and 22.4 MeV in 5Li. The reaction 3He(d, p)4He is an excellent analyser for deuteron vector and tensor polarization when specific angles for the different analysing power are chosen.
Nuclear Physics A 12/1971; 176(3-176):631-644. DOI:10.1016/0375-9474(71)90943-2 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The analysing powers iT11, T20, T21, T22 of the D(d, n)3He reaction between 90° and 160° c.m. are compared with those of the D(d, p)T reaction at 10.0 and 11.5 MeV. Differences are observed for T20, but no differences outside the experimental error exist for iT11, T21 or T22.
Physics Letters B 09/1971; 36(4):337-338. DOI:10.1016/0370-2693(71)90719-2 · 6.13 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The differential cross sections of the neutron transfer reactions 13C(18O, 19O)12C, 9Be (18O, 19O)8Be, 9Be(18O, 17O)10Be, 10B(19F, 18F)11B and 10B(18O, 17O)11B have been measured at energies in the region of the Coulomb barrier. Using a DWBA formalism, the products of the involved neutron spectroscopic factors have been extracted.
Nuclear Physics A 08/1971; 172(1):25-32. DOI:10.1016/0375-9474(71)90113-8 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Heavy ion one neutron transfer reactions have been investigated at energies below the Coulomb barrier. Using a DWBA treatment, products of neutron spectroscopic factors have been derived and compared with nuclear model predictions.
Annals of Physics 08/1971; 66(2-66):705-720. DOI:10.1016/0003-4916(71)90076-5 · 2.10 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The tensor analysing power T20 of 3He(d, p)4He has been calibrated absolutely at θlab = 0° and Ed = 6.49 and 9.30 MeV with the reaction. These measurements have been used to calibrate T20 and T22 in 4He(d, d)4He elastic scattering absolutely at two corresponding energies and θlab = 30°, 60° and 75°.
Nuclear Physics A 05/1971; 166(2-166):393-396. DOI:10.1016/0375-9474(71)90439-8 · 2.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The tensor analysing power T20 of the 3He(d, p)4He reaction has been measured at π = 0° between 2 and 11.2 MeV. This reaction shows excellent properties as an analyser for tensor polarized deuteron beams.