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Gold nucleus (""(79)^(198)Au) can decay ...

Gold nucleus `(""_(79)^(198)Au)` can decay into mercuyr nucleus `(""_(80)^(198)Hg^(8))` by two decay schemes shown in figure below (i) it can emit a `beta` -particle `(beta_(1))` and come to ground state by either emiting one `gamma`- ray (` gamma_(1)`) or emitting two `gamma`- rays (`gamma_(3)` and `gamma_(4)`) (ii) It can emit one `beta`- particle `(beta_(2))` and come to ground state by emitting `gamma_(2)` ray. Atomic masses: `""^(198)Au=197.9652` amu and `""^(198)Hg=197.9662` amu. Given that 1 amu= `930MeV//c^(2)`. The energy levels of the nucleus are shown in figure below

Whatis the maximum kinetic energy of emitted `beta_(2)` particle?

A

1.44 MeV

B

0.59 MeV

C

1.86 MeV

D

1.46 MeV

Text Solution

Verified by Experts

The correct Answer is:
D
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