Nuclear Physics [IAS (Admin.) Mains Physics]: Questions 1 - 8 of 20

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Question 1

Appeared in Year: 2011 (IFS)

Describe in Detail Subjective▾

(i) What angle do the make with the z – axis when for an electron?

(ii) Determine the value of the total angular momentum for a 3d electron.

(Paper-2) (Section – A)

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Explanation

(i) Angle do the make with z – axis is given as,

Where, is the z – component of the angular momentum, which is given as,

is the m…

… (609 more equations, 4 figures) …

Question 2

Appeared in Year: 2011 (IFS)

Write in Short Short Answer▾

Find the density of nucleus. (Given, nuclear radius of carbon ) (Section - B)

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Question 3

Appeared in Year: 2004

Describe in Detail Subjective▾

Write down the Bethe - Weizsacker mass formula. Explain various terms of the formula.

Edit

Explanation

Let us see how the picture of a nucleus as a drop of liquid accounts for the observed variation of binding energy per nucleon with mass number. We start by assuming that the energy associated with each nucleon - nucleon bond has some value U. This energy is actually negative since attractive force are involved, but it usually written as positive be…

… (1537 more equations, 69 figures) …

Question 4

Appeared in Year: 2004

Describe in Detail Subjective▾

Write the Weizacker mass formula and explain the significance of various terms.

Edit

Explanation

Let us see how the picture of a nucleus as a drop of liquid accounts for the observed variation of binding energy per nucleon with mass number. We start by assuming that the energy associated with each nucleon - nucleon bond has some value U. This energy is actually negative since attractive force are involved, but it usually written as positive be…

… (1218 more equations, 3 figures) …

Question 5

Appeared in Year: 2004

Describe in Detail Subjective▾

Calculate the binding energy per nucleon for and .

Edit

Explanation

The binding energy in of the nucleons which has neutrons, is given by

… (600 more equations) …

Question 6

Appeared in Year: 2016

Describe in Detail Subjective▾

Show that in the nuclear shell model, the level spacing between major oscillator shells is approx. .

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Explanation

The radial density distribution is given by

Malenka, Levinger and Kent have carried out calculation of for square wells of infinite and finite depth. The densit…

… (196 more equations) …

Question 7

Appeared in Year: 2010

Describe in Detail Subjective▾

Predict from the single particle shell model the shell configuration, ground state spin and parity for the following nuclei:

,

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Explanation

The shells are filled according to

The lost particle is a proton with spin

… (117 more equations) …

Question 8

Appeared in Year: 2005

Describe in Detail Subjective▾

Write the Weizacker mass formula and explain the significance of various terms.

Edit

Explanation

Let us see how the picture of a nucleus of as a drop of liquid accounts for the observed variation of binding energy per nucleon with mass number. Each bend energy is should by two nucleons, each has a binding energy of . When an assembly of spheres of the same size is packed together into the smallest volu…

… (509 more equations, 11 figures) …