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

doi:10.1016/0375-9474(80)90470-4

Nuclear Physics A

Volume 346, Issue 3, 15 September 1980, Pages 285-302

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Abstract

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.

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Cited by (6)

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.
7Li + 54Fe Single-nucleon stripping reactions at E = 48 MeV
1982, Nuclear Physics, Section A
Angular distributions have been measured for the ⁵⁴Fe(⁷Li, ⁶Li/⁶He)⁵⁵Fe, ⁵⁵Co reactions at $E(^{7} Li) = 48 MeV$ . Exact finite-range DWBA calculations for both reactions, employing Woods-Saxon real and imaginary potentials to generate the distorted waves, reproduce the shape of the f-state angular distributions but not the rate of fall-off with increasing angle for p-states. Using real potentials constructed by double-folding a microscopic nucleon-nucleon potential with a Woods-Saxon shaped imaginary potential to generate the distorted waves did not change the calculations. The forward angle (⁷Li, ⁶He) data allowed the $2 p_{12}$ states in ⁵⁵Co to be located and the determination of the single-particle centroid energies. The ⁵⁵Co spectroscopic factors are in good agreement with those from the (d, n) reaction but are generally 25 % lower than those from average (³He, d) results. The ⁵⁵Fe spectroscopic factors are in good agreement with (d, p) results.
Isospin dependence of the spin-orbit splitting in nuclei
2007, Physics of Particles and Nuclei
Single-particle levels and spin-orbit splitting in the vicinity of the doubly magic nucleus48Ca
2004, Physics of Atomic Nuclei
Parameters of the proton shell structure of the 40,42,44,46,48Ca nuclei and their analysis within the dispersive optical model
2003, Physics of Atomic Nuclei

^†: Permanent address: Lebanese University, Faculty of Sciences, Hadat-Beyrouth, Lebanon.

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Nuclear Physics A

Abstract

References (19)

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Cited by (6)

Nuclear Data Sheets for A = 49

Nuclear Data Sheets for A=49

<sup>7</sup>Li + <sup>54</sup>Fe Single-nucleon stripping reactions at E = 48 MeV

Isospin dependence of the spin-orbit splitting in nuclei

Single-particle levels and spin-orbit splitting in the vicinity of the doubly magic nucleus<sup>48</sup>Ca

Parameters of the proton shell structure of the <sup>40,42,44,46,48</sup>Ca nuclei and their analysis within the dispersive optical model