Nuclear Physics - Decay Processes and Atomic Structure

Questions covering nuclear decay processes (alpha, beta, gamma) and atomic structure including ground states and energy levels

7 Questions Published

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Questions

Question 1 Multiple Choice (Single Answer)

A free nucleus of mass $24$ u emits a gamma photon [when initially at rest]. The energy of the photon is $7$ MeV. The recoil energy of the nucleus in keV is

$1.1$
$1.2$
$1.0$
$1.3$

Question 2 Multiple Choice (Single Answer)

Nuclei $X$ decay into nuclei $Y$ by emitting $\alpha$ particles. Energies of $\alpha$ particle are found to be only $1MeV$ & $1.4MeV$. Disregarding the recoil of nuclei $Y$. The energy of $\gamma$ photon emitted will be:

$0.8MeV$
$1.4MeV$
$1 MeV$
$0.4MeV$

Question 3 Multiple Choice (Single Answer)

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:

$2.2\ keV$
$1.1 keV$
$3.1\ keV$
$22\ keV$

Question 4 Multiple Choice (Single Answer)

In a $\gamma -$decay process, $\gamma-$rays of energy $E$ is emitted. Find the decrease in internal energy of mass $M$ (of nucleus).

$\dfrac{E^2}{2Mc^2}$
$E - \dfrac{E^2}{2Mc^2}$
$E+\dfrac{E^2}{2Mc^2}$
$E+\dfrac{E^2}{Mc^2}$

Question 5 Multiple Choice (Multiple Answers)

Mark out the correct statement(s)

in alpha decay, the energy released is shared between alpha particle and daughter nucleus in the form of kinetic energy and share of alpha particle is more than that of the daughter nucleus
in beta decay, the energy released is in the form of kinetic energy of beta particles
in beta minus decay, the energy released is shared between electron and antineutrino
in gamma decay, the energy released is in the form of energy carried by photons termed as gamma rays

Question 6 Multiple Choice (Single Answer)

The wavelength of emitted $\gamma $ rays are in the other

${ \lambda } _{ \gamma 2 }\quad >\quad { \lambda } _{ \gamma 3 }\quad >{ \quad \lambda } _{ \gamma 1 }$
${ \lambda } _{ \gamma 3 }\quad >\quad { \lambda } _{ \gamma 2 }\quad >{ \quad \lambda } _{ \gamma 1 }$
${ \lambda } _{ \gamma 1 }\quad >\quad { \lambda } _{ \gamma 2 }\quad >{ \quad \lambda } _{ \gamma 3 }$
${ \lambda } _{ \gamma 3 }\quad >\quad { \lambda } _{ \gamma 1 }\quad >{ \quad \lambda } _{ \gamma 2 }$

Question 7 Multiple Choice (Single Answer)

A free nucleus of mass $24 amu$ emits a gamma photon (when initially at rest). The energy of the photon is $7 MeV$. The recoil energy of the nucleus in $keV$ is

$2.2$
$1.1$
$3.1$
$22$

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