๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

S- and P-wave neutron spectroscopy. Part Xb: Intermediate structure, 48Ca, 207Pb

โœ Scribed by F.T. Seibel; E.G. Bilpuch; H.W. Newson

Book ID
102986817
Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
668 KB
Volume
69
Category
Article
ISSN
0003-4916

No coin nor oath required. For personal study only.

โœฆ Synopsis

An improved method for fitting total cross section curves with an R-matrix code has been developed which allows us to interpret data which was previously considered too complicated for analysis. The widths of the l/2+ resonances of *O'Pb have been determined well enough to confirm the sum rule which should hold if the isolated l/2+ resonance in zosPb acts as a doorway state for both20'Pband20BPb.New data are included on the total cross section of Wa which is remarkable in that the resonances seem very close in energy and sometimes in width to those of oxygen. Furthermore, the calculations in the previous paper (Part Xa) predict correctly that there will be no observable s-wave resonances and also that most of the non s-wave resonances should be due to d-waves. These predicted J values are definitely confirmed for 4 out of 7 resonances and are consistent with all the data.

๐Ÿ“œ SIMILAR VOLUMES

S- and P-wave neutron spectroscopy Part
S- and P-wave neutron spectroscopy Part Xd: Intermediate structure, particle-vibration states
โœ M. Divadeenam; William P. Beres; Henry W. Newson ๐Ÿ“‚ Article ๐Ÿ“… 1973 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 543 KB

The weak coupling particle-vibration model is extended to lowlying neutron resonances in certain even-even or odd-odd nuclei by coupling the extra particle to core excited states of the odd mass target. The odd hole or particle in the target is treated as a passive spectator. zosPb and %'OBi are stu

s- and p-wave neutron spectroscopy Xc. I
s- and p-wave neutron spectroscopy Xc. Intermediate structure: 88Sr
โœ J.G Malan; W.F.E Pineo; M Divadeenam; B.H Choi; E.G Bilpuch; H.W Newson ๐Ÿ“‚ Article ๐Ÿ“… 1975 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 701 KB

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-l

s- and p-wave neutron spectroscopy Xf(ii
s- and p-wave neutron spectroscopy Xf(ii). Intermediate structure in the 28Si + n reaction: Doorway state calculation
โœ D Halderson; B Castel; M Divadeenam; H.W Newson ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 375 KB

A core-particle calculation developed to describe the low-lying structure of Y3i is extended above neutron threshold energy to yield information on the structure of doorway states indicated by the Yii + n reaction. The recent experimental evidence for a J = #-doorway state common to the YSi + n and

s- and p-wave neutron spectroscopy Xf(i)
s- and p-wave neutron spectroscopy Xf(i). Intermediate structure in the 28Si + n reaction: R-matrix interpretation of experimental data
โœ H.W Newson; W.F.E Pineo; B.-H Choi; J.M Clement; M Divadeenam ๐Ÿ“‚ Article ๐Ÿ“… 1977 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 646 KB

A multilevel R-matrix analysis of Si neutron cross-section data measured at NBS has been performed up to about 4.5 MeV neutron energy. Only a small fraction of the p-and s-wave s.p. strength is observed, but both exhibit local concentrations of strength indicative of doorway structure around 1 and 0