C.H. Johnson

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Physical Review C | 1977

C.H. Johnson; J.K. Bair; Chris Jones

The /sup 116/Sn(p,n) and /sup 118/Sn(p,n) thick-target integrated cross sections were measured up to about 100 keV above the thresholds and fitted by the Hauser--Feshbach statistical theory. It is shown for these nuclei that the familiar plot of the thick-target yield to the two-thirds power is not valid, except for an impractical region very near threshold. It is also shown that ..gamma..-ray emission dominates over neutron and proton emission for more than 100 keV above each threshold. The deduced thresholds are 5531 +- 6 keV for /sup 116/Sn and 4477 +- 3 keV for /sup 118/Sn. The corresponding Q values, 5483 +- 6 keV and 4439 +- 3 keV, disagree with values from the literature.

Physical Review C | 1977

C.H. Johnson; J.K. Bair; C. M. Jones

The /sup 116/Sn(p,n) and /sup 118/Sn(p,n) thick-target integrated cross sections were measured up to about 100 keV above the thresholds and fitted by the Hauser--Feshbach statistical theory. It is shown for these nuclei that the familiar plot of the thick-target yield to the two-thirds power is not valid, except for an impractical region very near threshold. It is also shown that ..gamma..-ray emission dominates over neutron and proton emission for more than 100 keV above each threshold. The deduced thresholds are 5531 +- 6 keV for /sup 116/Sn and 4477 +- 3 keV for /sup 118/Sn. The corresponding Q values, 5483 +- 6 keV and 4439 +- 3 keV, disagree with values from the literature.

Physical Review C | 1977