Study of isobaric analogue states in49Sc and core excited states in49Ca

doi:10.1016/0375-9474(79)90285-9

Nuclear Physics A

Volume 329, Issues 1–2, 8–15 October 1979, Pages 127-140

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Abstract

Excitation functions of the elastic and the inelastic proton scattering leading to the ground state and to the 2 ⁺ (3.833 MeV), 3 ⁻ (4.506 MeV) and 5 ⁻ (5.73 MeV) excited states in⁴⁸Ca were measured at 90°, 125°, 140° and 160° at bombarding energies from 5.55 to 8.4 MeV. Nine resonances were identified and the angular distributions of the inelastically scattered protons were measured at bombarding energies corresponding to the resonances observed in the excitation curves. The spins of the resonances and their partial widths for decay to the ground state and to the excited states in⁴⁸Ca were determined. The results indicate that six positive parity states and three negative parity states may be interpreted as having a large component of a single particle state coupled respectively to the 3 ⁻ and 2 ⁺ excited states of⁴⁸Ca. The center of gravity of the parent analogue states in ⁴⁹Ca, which were interpreted as having a large| ⁴⁸Ca(3 ⁻)ψ _n(p ₃₂)〉 _J component in their configuration, fits with the prediction of the particle-core weak coupling model.

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Nuclear Data Sheets for A = 49
2008, Nuclear Data Sheets
Nuclear Data Sheets for A=49
1986, Nuclear Data Sheets
The 1978 evaluation of A=49 (78Ha15) has been revised using experimental decay and reaction data received by the cutoff date noted below. See also 75Be56 and 76Ha07 for mass excess and deformation calculations relevant to the unobserved nuclides of ⁴⁹Co and ⁴⁹Ni.
Thermonuclear reaction rates: see 79Wo07 for calculations on the production of A=49 nuclei via α- and p-induced reactions and 83Sa30 for a study on the effects of excited states on the reaction rates.
Neutron-induced reaction data: see the bibliography CINDA-A, CINDA-B, and supplements.
Single-particle and core-excited states in 49Sc: (I). The 48Ca(3He, d)49Sc reaction
1980, Nuclear Physics A
The ⁴⁸Ca(³He, d)⁴⁹Sc reaction has been studied at 25 MeV incident energy. Angular distributions have been measured from 5° to 40° using a split-pole spectrometer, for about 160 levels located up to 18 MeV excitation energy. A local zero-range DWBA analysis has been carried out, using Gamow functions as form factors in the case of unbound states; l-assignments and spectroscopic factors are obtained for a large number of levels, most of them previously unknown. The summed experimental spectroscopic strengths for the T_<, l = 1 and l = 3 levels are in good agreement with the shell-model sum-rule limits for 1f-2p proton states, and their energy centroids have been determined. The $lg_{92}$ strength in ⁴⁹Sc is strongly fragmented: about 27% of the T_< strength is carried by twenty-three levels located between 6.5 and 13.5 MeV. Spectroscopic factors for analog states are compared with those from previous (p, p), (³He, dp) and (d, p) experiments.
Octupole strength in the neutron-rich calcium isotopes
2016, Physical Review C

: Work supported in part by the Israel Academy of Sciences and Humanities.

^††: Present address: Department of Physics, Technion, Israel Institute of Technology, Haifa Israel

^†††: At present on sabbatical leave at GSI, Darmstadt, West Germany

^‡: Deceased.

^‡‡: Present address: Department of Nuclear Engineering, Technion, Israel Institute of Technology, Haifa

^‡‡‡: Present address: Physics Division, Argonne National Laboratory, Argonne, Illinois, USA

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Nuclear Physics A

Abstract

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Nuclear Data Sheets for A = 49

Nuclear Data Sheets for A=49

Single-particle and core-excited states in <sup>49</sup>Sc: (I). The <sup>48</sup>Ca(<sup>3</sup>He, d)<sup>49</sup>Sc reaction

Octupole strength in the neutron-rich calcium isotopes