Neutron scattering and models: Silver
- Argonne National Lab., IL (United States)
Differential neutron elastic-scattering cross sections of elemental silver were measured from 1.5 {r_arrow} 10 MeV at {approx} 100 keV intervals up to 3 MeV, at {approx} 200 keV intervals from 3 {r_arrow} 4 MeV, and at {approx} 500 keV intervals above 4 MeV. At {le} 4 MeV the angular range of the measurements was {approx} 20{sup 0} {r_arrow} 160{sup 0} with 10 measured values below 3 MeV and 20 from 3 {r_arrow} 4 MeV at each incident energy. Above 4 MeV {ge} 40 scattering angles were used distributed between {approx} 17{sup 0} and 16{sup 0} All of the measured elastic distributions included some contributions due to inelastic scattering. Below 4 MeV the measurements determined cross sections for ten inelastically-scattered neutron groups corresponding to observed excitations of 328 {+-} 13, 419 {+-} 50, 748 {+-} 25, 908 {+-} 26, 115 {+-} 38, 1286 {+-} 25, 1507 {+-} 20, 1632 {+-} 30, 1835 {+-} 20 and 1944 {+-} 26 keV. All of these inelastic groups probably were composites of contributions from the two isotopes {sup 107}Ag and {sup 109}Ag. The experimental results were interpreted in terms of the spherical optical model and of rotational and vibrational coupled-channels models, and physical implications are discussed. In particular, the neutron-scattering results are consistent with a ground-state rotational band with a quadrupole deformation {Beta}{sub 2} = 0.20 {+-} {approx} 10% for both of the naturally-occurring silver isotopes.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 395613
- Report Number(s):
- ANL/NDM-137; ON: DE97000530; TRN: 97:000129
- Resource Relation:
- Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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