Elsevier

Nuclear Physics A

Volume 472, Issue 1, 21 September 1987, Pages 1-25
Nuclear Physics A

Deeply-bound hole states in 57Co and the spreading of the 1d52 hole strength distribution

https://doi.org/10.1016/0375-9474(87)90217-XGet rights and content

Abstract

In an attempt to locate the 1d52 proton hole state in 57Co we have measured the 58Ni(d, 3He)57Co reaction with 79.6 MeV vector polarized deuterons. An overall energy resolution of 50 keV was achieved with a magnetic spectrometer. The spectra show fine structure up to Ex = 11 MeV; this fact was used to define energy bins for which cross sections and analyzing powers were obtained. The latter allowed spin and parity assignments for deep-lying hole states in 57Co. Spectroscopic factors were obtained by applying standard DWBA calculations. Most of the strength above 6.6 MeV was identified as being 1d52 in nature. The running sum of Spectroscopic factors shows a linear increase implying a nearly uniform spread of the 1d52 Spectroscopic strength or a width of the 1d52 hole state comparable to the excitation energy.

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    1

    Present address: CSIRO Division of Atmospheric Research, Private Bag No. 1, Mordialloc, Victoria, Australia.

    2

    Present address: National Laboratory, Oak Ridge, Tennessee 37831, USA.

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