MCQOPTIONS
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MCQOPTIONS
| 1. |
A \[^{7}Li\] target is bombarded with a proton beam current of \[{{10}^{-4}}\] A for 1 hour to produce \[^{7}Be\] of activity \[1.8\times {{10}^{8}}\] disintegrations per second. Assuming that one \[^{7}Be\] radioactive nucleus is produced by bombarding 1000 protons, determine its half-life. |
| A. | \[8.6\times {{10}^{6}}s\] |
| B. | \[4.2\times {{10}^{5}}s\] |
| C. | \[3.1\times {{10}^{5}}s\] |
| D. | \[1.1\times {{10}^{6}}s\] |
| Answer» B. \[4.2\times {{10}^{5}}s\] | |