Download PDF by Georges Audi (auth.), David Lunney, Georges Audi, H.-Jürgen: Atomic Physics at Accelerators: Mass Spectrometry:

By Georges Audi (auth.), David Lunney, Georges Audi, H.-Jürgen Kluge (eds.)

ISBN-10: 9048158257

ISBN-13: 9789048158256

ISBN-10: 9401512701

ISBN-13: 9789401512701

The look for examples of proton radioactivity has ended in the invention of a giant variety of proton emitters within the zone 50 < Z < eighty four [1]. lots of those proton emitters and their daughters also are a-emitters, and at times the a-decay chain from the daughter terminates on a nuclide in the direction of balance whose mass extra is understood. This opens up the potential for utilizing a-and proton-decay Q-values to figure out the mass excesses of a giant team of nuclei attached via 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 hooked up to nuclei with identified mass excesses, proton separation energies should be measured every now and then and derived in others. For the a-decay ofthe father or mother nucleus (Z, A) to the daughter (Z - 2, A - 4), the strength and momentum family members 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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Tz = 2, have been employed with considerable success to measure the masses of a number of light and medium mass nuclei using the EPICS spectrometer at Los Alamos [26, 31, 32]. D ± 2mec2. Experimentally the method is similar to that used for transfer reactions with the constraint that the calibration reaction is DCX as well. The mass determinations EXPERIMENTAL OVERVIEW OF MASS MEASUREMENTS 43 have moderate uncertainties ("-'50-150 keV) the statistics being the main limitation of the precision. The measurements are challenging owing to the weak reaction cross sections ("-'100-500 nb/sr) coupled with low pion fluxes.

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Phys. A 431 (1984), 393. Groote, H. , Hilf, E. R. ,At. Nucl. Data Tables 17 (1976),418. Borcea, C. , AlP Conf. Proc. 455 (1998), 98. Borcea, C. , Proc. Int. Conf. Exot. Nuc. & At. Masses (ENAM'95), 1995, p. 127. 34 G. AUD! 44. Borcea, C. , Rev. Roum. Phys. fr/AMDC/extrapolationslbernex. pdf. fr/amdc/. , Report CSNSM 97-09, July 1997. , Dufio, J. , Proc. ENAM'95 Conj, Aries, June 1995, p. 151. 45. 46. 47. 35 Hyperjine Interactions 132: 35-57,2001. © 2001 Kluwer Academic Publishers. P. 66318, 05389-970 Sao Paulo, Brasil Abstract.

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


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