Isodiaphers

The two nuclides having the same neutron difference are known as isodiaphers. The neutron difference is otherwise known as isotopic number or isotopic excess. The neutron difference  is the difference between the number of neutrons and number of protons.
 eg: A1 X Z1 and A2 Y Z2 are two nuclides

X contains Z1 protons and (A1 - Z1 ) neutrons so its Neutron difference= (A1 - Z1) - Z1 =  (A1- 2Z1)
Y contains Z2 protons and( A2 - Z2 ) neutrons so its Neutron difference= (A2 - Z2) - Z2 =  (A2- 2Z2)
If  (A1 - 2Z1) = (A2 - 2Z2) X and Y are isodiaphers.

234U90 and 238U92 are isodiaphers in both cases neutron number is the same
(234-2×90) =54= (238-2×92)

The isodiaphers usually  result by an α ( 4 He2 ) particle emission, the nuclide formed after emission and mother nuclide will be isodiaphers.
238U92------à234U90 + 4 He2
In some cases nuclear number can be zero also.


Comments

  1. Sai's Science and Maths class6 July 2015 at 10:06

    The topic on renewable energy and Plus2 notes available on the Home page

    ReplyDelete

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