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In this report we describe the general theory of internal electron-positron pair conversion. Within the point nucleus approximation we derive analytical ...

15.10.1952 · The positron spectra from the internal pair conversion of the two γ-rays following the β − decay of Na 24 have been observed, and the internal pair conversion coefficients found to be 7.1× 10 − 4 in the case of the 2.758-Mev γ-ray and 0.6× 10 − 4 in the case of the 1.380-Mev γ-ray.The value of the coefficients and the shape of the spectra lead to the conclusion that both γ …

Nov 14, 1996 · Two-lepton decay of a boson emitted in a nuclear transition would produce a structure on top of the e+e- angular correlation from internal pair conversion (IPC) [9,10] and external pair conversion (EPC) [11 -13 ]. These processes are peaked at 0and decline for low Z nuclei rapidly with increasing cn, EPC even more drastically than IPC.

The positron spectra from the internal pair conversion of the two γ-rays following the β−decay of Na24have been observed, and the internal pair conversion coefficients found to be 7.1×10−4in the case of the 2.758-Mev γ-ray and 0.6×10−4in the case of the 1.380-Mev γ-ray.

WHEN a γ-quantum, emitted from the nucleus of a radioactive atom, is absorbed by the same atomic system, an ordinary electron and a positron may be liberated if the energy of the γ-quantum is greater than 2mc2. This effect has been calculated by Jaeger and Hulme1 on the assumption that the γ-ray is electric dipole or quadrupole radiation. I have performed the …

This efficiency, combined with the fraction of the observed coincidence rate that is due to pair emission from ${\mathrm{Mg}}^{24}$ and with the known disintegration rate of the parent ${\mathrm{Na}}^{24}$ source yields a value of (6.7\ifmmode\pm\else\textpm\fi{}1.0)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{ …

The measurements were performed using an improved experimental setup at the double-Orange spectrometer of GSI. Particular emphasis is put on the signature of positrons from Internal-Pair-Conversion (IPC) processes in the measured e + -energy spectra, following the de-excitation of electromagnetic transitions in the moving Ta-like nucleus.

The U.S. Department of Energy's Office of Scientific and Technical Information

01.06.1997 · OSTI.GOV Journal Article: Internal pair conversion in heavy nuclei. Internal pair conversion in heavy nuclei. Full Record; Other Related Research

This video was about internal pair conversion.It also includes difference between pair production and internal conversion and also electron capture.Thank you

The U.S. Department of Energy's Office of Scientific and Technical Information

Internal conversion is a non-radioactive decay process wherein an excited nucleus interacts electromagnetically with one of the orbital electrons of the ...

I. Ahmad, S. M. Austin, B. B. Back, R. R. Betts, F. P. Calaprice, K. C. Chan, A. A. Chishti, C. Conner, R. W. Dunford, J. D. Fox, S. J. Freedman, M. Freer, J. S ...

WHEN a γ-quantum, emitted from the nucleus of a radioactive atom, is absorbed by the same atomic system, an ordinary electron and a positron may be ...

WHEN a γ-quantum, emitted from the nucleus of a radioactive atom, is absorbed by the same atomic system, an ordinary electron and a positron may …

A gamma-gamma coincidence counting method is used to detect pair emission ... for the internal pair-conversion coefficient of the 2.76-Mev transition in ...

In this report we describe the general theory of internal electron-positron pair conversion. Within the point nucleus approximation we derive analytical ...

In internal pair production, excess energy is directly converted within the electromagnetic field of a nucleus into an electron and a positron (positively ...

This video was about internal pair conversion.It also includes difference between pair production and internal ...

Internal conversion coefficients of γ-rays with production of monoenergetic positrons (CCMP) were calculated. The results of CCMP calculations for the EI, ...

This video was about internal pair conversion.It also includes difference between pair production and internal conversion and also electron capture.Thank you

A deviation in internal pair conversion FWN de Boer, O Frohlich, KE Stiebing, K Bethge, H Bokemeyer, A Balanda, A Buda, R van Dantzig, TW Elze, H Folger, J van Klinken, KA Muller, K Stelzer, P Thee, M Waldschmidt

Internal Pair Conversion M. H. WANG Nature 162 , 264 ( 1948) Cite this article 287 Accesses 4 Citations Metrics Abstract WHEN a γ-quantum, emitted from the nucleus of a radioactive atom, is...

Internal Pair Conversion (IPC), which has attracted renewed interest recently with regard to the sharp lines reported in e^+-e^- sum-energy spectra from heavy ion collisions, is thought to be well understood. In heavy nuclei, however, where relativistic and charge-distribution effects are expected to be large, measured absolute pair conversion coefficients are not more precise than ...

I. Ahmad, S. M. Austin, B. B. Back, R. R. Betts, F. P. Calaprice, K. C. Chan, A. A. Chishti, C. Conner, R. W. Dunford, J. D. Fox, S. J. Freedman, M. Freer, J. S ...