A Study of the 7-Li(p,n) 7-Be Excitation Function at Intermediate Energies Using Residual Activity

Supported by the National Science Foundation and Indiana Universit

A Study of the 7-Li(p,n)7-Be Excitation Function at Intermediate Energies Using Residual Activity

This work was supported by National Science Foundation Grants PHY 76-84033A01, PHY 78-22774, and Indiana Universit

Gamow-Teller Resonances Observed in 90,92,94-Zr(p,n) at 120 and 160 MeV

Supported by the National Science Foundation and Indiana Universit

Gamow-Teller Strength in Simple Nuclei and Renormalization of the Axial-Vector Coupling Constant

This work was supported by the National Science Foundation Grants NSF PHY 78-22774 A03, NSF PHY 81-14339, and by Indiana Universit

Energy Dependence of the Ratio of Isovector Effective Interaction Strengths |J_στ/J_τ| from 0° (p,n) Cross Sections

This work was supported by the National Science Foundation Grants NSF PHY 78-22774 A03, NSF PHY 81-14339, and by Indiana Universit

General Features of the Gamow-Teller Resonances

This work was supported by the National Science Foundation Grant NSF PHY 78-22774 A02 & A03 and by Indiana Universit

Strong Spin-Flip Transitions in (p,n) Reactions

This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

Excitation of Giant Spin-Isospin Multipole Vibrations in 54,56-Fe and 58,60-Ni

This work was supported by the National Science Foundation Grant NSF PHY 81-14339 and by Indiana Universit

Energy Systematics of the Giant Gamow-Teller Resonance and a Charge-Exchange Dipole Spin-Flip Resonance

This work was supported by the National Science Foundation Grant NSF PHY 78-22774 A02 & A03 and by Indiana Universit

Catfishes as prey items of Potamotrygonid stingrays in the Solimões and Negro rivers, Brazilian Amazon

In spite of the fact that catfish have rarely been reported as food items in the diets of freshwater stingrays, they are commonly observed in the stomach contents of species inhabiting the Solimões and Negro rivers in the Brazilian Amazon. The stomach contents of six rays from the Solimões River and 64 from the Negro River were analyzed, and catfishes (distributed among the families Callichthyidae, Cetopsidae, Doradidae and Loricariidae) were found in the stomach contents of four and 10 of these rays, respectively, comprising a frequency of occurrence of 20%. These data indicate a relevant participation of catfishes in the diets of potamotrygonid rays in the Amazon, and may reflect the regional diversity and abundance of Siluriformes in the region