Atomic and Nuclear Physics Answers

The electrical conductivity of monovalent Na metal is 117m1017.2−−Ω×. Calculate the relaxation time and the drift velocity in a field of 100 V m−1. Take density of Na to be 0.97 gm cm−3.

. A tank of C2Cl4 (containing 37Cl) is used as a neutrino detector to
measure the flux of neutrinos produced in the sun. A neutrino has a
cross-section for interacting with matter of approximately 10 fb.
a. Write down the nuclear decay that occurs when a 37Cl nucleus
interacts with a solar neutrino (Hint: try rearranging beta decay
equations).
b. Assuming there is a material with approximately 1024 protons
per cm3
: what is the probability that the neutrino will interact
when travelling through 10 m of detector?

With which of the following is the weak nuclear force associated?





a.
lightning
c.
ocean tides
b.
nuclear decay
d.
static cling

What is the y-component of a 100 N force that is exerted at 60N to the horizontal

Define binding energy. Calculate the binding energy per nucleon of Fe. 56
26 Given M(56 Fe) = ( Fe) 55.934932 u,mn =1.008665 u and mp=1.007825 u.
26

For a hydrogen-like atom, give all possible spectral terms for n = 2 and n = 3.

The wavefront for a particle is defined by:
Ψ(x)= {Ncos(2πx/L) for -L/4≤x≤L/4
{0 otherwise
Determine:
i) the normalisation constant N
ii) the probability that the particle will be found between x=0 and x=L/8.

Compute the total binding energy and the binding energy per nucleon for Lithium-7.

The disintegration constant of 238U is 4.87×10^(-18)s^(-1).Calculate its half-life (in years). Also calculate the number of disintegration per second from 1 gram of Uranium. It is given that Avogadro’s number = 6.02×10^23

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