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A nucleus of mass 20 u emits a gamma-pho...

A nucleus of mass 20 u emits a `gamma`-photon of energy 6 MeV. If the emission assume to occur when nucleus is free and rest, then the nucleus will have kinetic energy nearest to (take `1u = 1.6 xx 10^(-27)` kg)

A

10 keV

B

1 keV

C

0.1 keV

D

100 keV

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A stationary nucleus of mass 24 amu emits a gamma photon. The energy of the emitted photon is 7 MeV. The recoil energy of the nucleus is

    A
    (a) `2.2keV`
    B
    (b) `1.1 keV`
    C
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    D
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    A
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    B
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    C
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    D
    `.12xx10^(1)nm`

  • Given the mass of iron nucleus as 55.85u and A = 56, the nuclear density is (u = 1.66 xx 10 ^(-27) kg, r = 1.2 xx 10 ^(-15)m )

    A
    `1.29 xx 10 ^(-7)kgm^(-3)`
    B
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