W.P. Jones

Neutron transition density for the lowest 2+ state of 18O

Abstract Scattering of 135 MeV protons is used to fit an expansion in radial basis functions of the neutron transition density for the lowest 2 + state of 18 O. The narrow error envelope shows good radial sensitivity. The results are consistent with electromagnetic decay data for the mirror transition in 18 Ne.

The 13C(p, d)12C and 208Pb(p, d)207Pb reactions at 123 MeV

Abstract Cross-section and analyzing power angular distributions have been measured for 13 C ( p , d ) and 208 Pb ( p , d ) at 123 MeV to the strong low-lying residual states in both final nuclei. The data have been compared with the results of both zero- and exact-finite-range distorted wave calculations. and some serious discrepancies were noted for the analyzing powers. For the case of the 13C calculations, marked improvement in the description of the data was achieved with the use of a damping factor in the nuclear interior.

192Os(p, p') reaction at 135 MeV

Abstract Angular distributions of dσ/dΩ and A y for excitation of 0 1 + , 2 1 + , 2 2 + , 4 1 + , 4 2 + and 4 3 + states in 192 Os by 134.5 MeV protons have been measured. Results for quadrupole transitions are in good agreement with previous results. For the L = 4 transitions to the first three 4 + states, quite large strengths are observed, much larger than expected from IBM1 calculations, particularly for the 4 3 + state.

The 54Fe(p, d)53Fe and 140Ced(p, d)139Ce reactions at 122 MeVag

Abstract The 54Fe( p , d)53Fe and 140Ce( p , d)139Ce reactions have been studied at a proton energy of 122 MeV. Analyzing powers and angular distributions were obtained for outgoing deuterons to the strong low-lying single-particle states in both nuclei. These data along with the data of others at 26, 29, 41, 52 and 24, 35, 55 MeV for 54Fe and 140Ce respectively, have been compared with exact-finite-range DWBA calculations carried out in a consistent fashion to determine the energy dependence of the spectroscopic factors. A strong energy dependence was noticed for the spectroscopic factors when the l-values were large.

The 24Mg(p, d) reaction to the 12+ state at 2.36 MeV at proton energies from 27 to 185 MeV

Abstract Exact-finite-range DWBA calculations were performed for the l =0 transition to the 1 2 + state at 2.36 MeV measured in the 24 Mg(p, d) 23 Mg reaction at eight proton energies ranging from 27.3 to 185 MeV, including newly measured data at 49.2 and 150.3 MeV. Qualitative agreement both for the cross section data and analyzing powers was obtained for energies up to 95 MeV, but at 150 and 185 MeV a good description of the angular distributions could not be combined with an energy-independent spectroscopic factor.

(f72)7,0−2 configuration high-spin states in 60Co strongly excited in the 62Ni(d, α) reaction☆

Abstract The 62 Ni ( d , α) 60 Co reaction has been studied with 78 MeV vector polarized deuterons. Angular distributions of the differential cross section and vector analyzing power have been measured for strongly populated states in 60 Co up to an excitation energy of 5 MeV. The transferred orbital and total angular momenta L and J were determined from the characteristic shapes of the differential cross sections and vector analyzing powers yielding a number of new spin assignments. The J π = 7 + stretched [( 62 Ni g.s. ) 0 + ⊗(1 f 7 2 ) 7,0 −2 ] configuration was found to be distr least over nine states located at 1.51, 3.09, 3.46, 3.67, 3.78, 4.04, 4.55, 4.70 and 4.80 MeV.

High-spin states inCo56,58with theNi58,60(d,α)Co56,58reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.

High-spin states in /sup 56,58/Co with the /sup 58,60/Ni(d,. cap alpha. )/sup 56,58/Co reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.

High-spin states in Co-56, Co-58 with the Ni-58, Ni-60 (d, alpha) Co-56, Co-58 reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.

Resonant Depolarization Effects for Polarized Beams in the Indiana University Cyclotron

Resonant depolarization effects have been investigated for axially polarized beams accelerated in cyclotrons of the four‐sector, separated‐magnet configuration under construction at Indiana University. No intrinsic depolarizing resonances were encountered in the final cyclotron stage for beams of protons, deuterons, and 3He ions. Depolarization probabilities for resonances present in the injector cyclotron stage were determined to be < 10−6.