Nuclear and Particle Physics SubAtomic Physics

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NotesNotes

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NotesNotes

… more on nuclear sizeWhat do we define as nuclear size?NotesConsider the following:• the nucleus has a net positive charge Ze (Z protons)• take into account Coulomb + nuclear forceVBResulting potentialextends to ∞as 1/R 2Coulombrepulsivehas short(~10 -15 m) rangeDefine:barrier height B at a distancefrom centre R:B = Zze 24πε 00 RRrfor incident charge ze-V 0 nuclear attractiveR = POTENTIAL RADIUS ⇒ related to distribution of protons &neutrons AND the range of nuclear forcepotential radius > charge (or mass) radiusCHARGE RADIUS⇒ related to charge (proton) distribution

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Nuclear and Particle Physics SubAtomic Physics

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