Nuclei Test - 6...

A proton, a deutron and an $$\alpha $$- particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to it.  What is the ratio of their kinetic energy? 

When a $$\beta^-$$ -particle is emitted from a nucleus, the neutron-proton ratio:

For two different radioactive sample activity verses time curve is 

The relation between $$U(r)$$ and r for diatomic molecule is given as $$U(r)=\dfrac{a}{r^{12}} - \dfrac{b}{r^5}$$
The energy of dissociation of the molecule if given as

Let $${ m }_{ p }$$ be the mass of a proton, $${ m }_{ n }$$ the mas of a neutron, $${ M }_{ 1 }$$ the mass of a $$^{20}_{10}Ne$$ nucleus and $${ M }_{ 2 }$$ the mass of a $$^{ 40 }_{ 20 }Ca$$ nucleus. Then 

An X-ray pulse of wavelength $$4.9 A^{o}$$ is sent through a section of Wilson cloud chamber containing a supersaturated gas, and tracks of photoelectron ejected from the gaseous atoms are observed. Two groups of tracks of lengths $$1.40 cm$$ and $$2.02 cm$$ are noted. If the range energy relation for cloud chamber is given by $$R = aE$$ with $$ \alpha = \frac { 1 \mathrm { cm } } { k e V }$$. Obtain the binding energies of the two levels from which electrons are emitted. Given $$ h = 6.63 \times 10 ^ { - 34 } \mathrm { J } - \mathrm { s } , \mathrm { e } = 1.6 \times 10 ^ { - 19 } \mathrm { J } $$

The count rate of a radioactive source at  $$t = 0$$  was  $$1600$$  count/s and at  $$t = 8 { s },$$  it was  $$100$$  count/s. The count rate (in counts) at  $$t = 6 s$$  was

The binding energy of deutron is $$2.23MeV$$. What should be its mass defect in the units of $$amu$$ or $$u$$ ?

In an $$\alpha$$-decay the Kinetic energy of $$\alpha$$ particle is 48 MeV and Q-value of the reaction is 50 MeV. The mass number of the mother nucleus is : (Assume that daughter nucleus is in ground state)

The kinetic energy of $$\alpha$$ -particle emitted in the $$\alpha$$ -decay of $$88 \mathrm { Ra } ^ { 226 }$$ is [given, mass number of $$\mathrm { Ra } = 222 \mathrm { u } ]$$