Get Atomic Physics at Accelerators: Mass Spectrometry: PDF

By David Lunney,Georges Audi,Heinz-Jürgen Kluge

the hunt for examples of proton radioactivity has led to the invention of a big variety of proton emitters within the area 50 < Z < eighty four [1]. lots of those proton emitters and their daughters also are a-emitters, and every now and then the a-decay chain from the daughter terminates on a nuclide toward balance whose mass extra is understood. This opens up the potential of utilizing a-and proton-decay Q-values to figure out the mass excesses of a giant workforce of nuclei hooked up through particle decay. The Q-values are derived from the measured kinetic energies of the emitted protons or a-particles. the place the decay chains are usually not attached to nuclei with identified mass excesses, proton separation energies may be measured now and again and derived in others. For the a-decay ofthe dad or mum nucleus (Z, A) to the daughter (Z - 2, A - 4), the strength and momentum kin used to transform among Q-value, mass (M) and mass extra (ME) are: M(4He)E", (1) M(Z - 2, A - 4)Erecoil, (2) Q", E", + Erecoi, ME(Z, A) Q", + ME(Z - 2, A - four) + ME(4He). (3) In perform, one makes use of M(4He) ~ four and M(Z - 2, A - four) (A - 4), in order that Equation (3) turns into ME(Z, A) = E", (_A_) + ME(Z - 2, A - four) + ME(4He). (4) A -4 equally, for protons, we've ME(Z, A) = Ep(_A_) +ME(Z - 1, A-I) +ME(lH).

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Atomic Physics at Accelerators: Mass Spectrometry: Proceedings of the APAC 2000, held in Cargèse, France, 19–23 September 2000 by David Lunney,Georges Audi,Heinz-Jürgen Kluge


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