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A He^(+) ion is at rest and is in ground...

A `He^(+)` ion is at rest and is in ground state. A necutron with intial kinetic energy`K` collides heads on with the `He^(+)` ion. Find minimum value of `K` so that there can be an inelastic collision between these two particals.

Text Solution

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Energy available for excitation `=(4K)/(5)`
Total energy required for excitation
`=10.2 ev+40.8 evV`
`=51.0 ev`
`:. (4k)/(5)=51 rArrk=63.75 eV`
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