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s- and p-wave neutron spectroscopy Xc. Intermediate structure: 88Sr

โœ Scribed by J.G Malan; W.F.E Pineo; M Divadeenam; B.H Choi; E.G Bilpuch; H.W Newson

Book ID
102986920
Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
701 KB
Volume
89
Category
Article
ISSN
0003-4916

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โœฆ Synopsis

Neutron total cross section measurements of natural Sr were made from 50-875 keV using a high resolution proton beam and the 'Li(p, n)reaction as a neutron source.These data were analyzed with the help of an R-Matrix code to extract resonance (energies and other) parameters up to about 850 keV. 2p-lh and particle-vibration doorway interpretation of the s-, p-and d-wave resonances is attempted in terms of the sum rule C ymna = yd2. Predictions based on both of these models agree with the experimental results. As expected the p-wave resonances are stronger than either s-and d-wave structure. Theory accounts for the p-wave strength remarkably well. Possible location of the p-wave s.p. resonance is reproduced with a real potential and its damping due to the imaginary potential is calculated.

More fragmentation of the strong p-wave doorways is observed than was expected for a compound nucleus so near *"Zr, but a larger strength function is observed apparently due to the p-wave giant resonance.

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