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The emission of penetraing alpha , betap...

The emission of penetraing `alpha , beta`particle `(""_(2) ^(4) He ` and `""_(-1)^(0)e` respectively ) along with `gamma`- radiation (hv) was noticed from unstable nuclei . All elements having `Z gt 82` show this phenomenon . The emission was explained in terms of low binding energy (giving `alpha`- decay) high n/p ratio (neutron decay) , `gamma` from a radioactive nuclide is secondary emission
The emission of penetrating rays from a radioactive species can be shielded by

A

Bi blocks

B

Pb blocks

C

C blocks

D

Mg blocks

Text Solution

Verified by Experts

The correct Answer is:
B
`(4 xx 1.1 = 4.4 ) MeV ( 4 xx 7 = 28) Me V , Q = (28 - 4.4) = 23.6 MeV`
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