Sequential decays of the. Upsilon. prime prime

We have studied the decay chain {Upsilon}{prime}{prime}{r arrow}{chi}{sub {ital b}}{sup {prime}}({chi}{sub {ital b}}){gamma} {r arrow}{Upsilon}{prime}({Upsilon}){gamma}{gamma}{r arrow}{mu}{mu}({ital ee}){gamma}{gamma} with the CUSB II detector at the Cornell Electron Storage Ring. For a sample of 1.33{times}10{sup 6} {Upsilon}{prime}{prime}'s we find {approx}400 events. We measure branching ratios for {chi}{sub {ital b}{ital J}}{sup {prime}}{r arrow}{Upsilon}{prime}({Upsilon}){gamma} and, using calculated {ital E}1 rates, we derive total and hadronic widths of the {chi}{sub {ital b}}{sup {prime}} states. From these widths we obtain values of {alpha}{sub {ital s}} in the range between 0.13 and 0.21, in agreement with other determinations. We observe the suppressed decay {Upsilon}{prime}{prime}{r arrow}{chi}{sub {ital b}}{gamma}. The measured branching ratio suggests that relativistic effects are important. We also determine the branching ratios for {Upsilon}{prime}{prime}{r arrow}{Upsilon}{prime}{pi}{sup 0}{pi}{sup 0} to be (1.3{plus minus}0.4{plus minus}0.2)% and {Upsilon}{prime}{prime}{r arrow}{Upsilon}{pi}{sup 0}{pi}{sup 0} to be (1.8{plus minus}0.3{plus minus}0.2)%.