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Homework 9 Solutions - Optics and Modern Physics | PHYS 275, Assignments of Optics

Material Type: Assignment; Professor: Zorba; Class: Optics & Modern Physics; Subject: Physics; University: Whittier College; Term: Unknown 1989;

Typology: Assignments

Pre 2010

Uploaded on 08/18/2009

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PHYS 275: Hw 9 Solutions
Chapter 11:
3-) Since the maximum energy is transferred in an head-on collision, we have
(a)
(b) If the incident particle is a neutron then, starting from the same equation, we have
8-) Out of tritium and helium , we expect the tritium to have a larger binding energy as it has no
Coulomb repulsion. Whereas has two protons whose coulomb repulsion will lower the binding
energy.
9-) Out of and , we expect to have a larger binding energy as it has less number of
protons, and hence less Coulomb repulsion.
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PHYS 275: Hw 9 Solutions Chapter 11 : 3 - ) Since the maximum energy is transferred in an head-on collision, we have (a) (b) If the incident particle is a neutron then, starting from the same equation, we have 8 - ) Out of tritium and helium , we expect the tritium to have a larger binding energy as it has no Coulomb repulsion. Whereas has two protons whose coulomb repulsion will lower the binding energy. 9 - ) Out of and , we expect to have a larger binding energy as it has less number of protons, and hence less Coulomb repulsion.

Using the Weizsacker formula Note that since has an odd number of neutrons and an even number of protons there is not a fifth term (unlike an even-even and/or odd-odd combinations, see page 303 in Rohlf). Notice how accurate the nuclear liquid model is in predicting the binding energies. 15 - ) The activity of a radioactive substance is given by If the activity drops by a factor of 32 in 5 seconds , we have

since

20 - ) (a) (b)