Three-Photon Correlations in Rotational Nuclei

Rotational Damping in Ytterbium Nuclei

“…The resulting distribution of g-ray energies emitted by a single level has a FWHM that is called the "rotational damping width" ͑G rot ͒. Attempts to measure G rot began about 15 years ago [2,3], and shortly thereafter very rough values in the correct (presently measured) range were reported [4,5].…”

“…The resulting distribution of g-ray energies emitted by a single level has a FWHM that is called the "rotational damping width" ͑G rot ͒. Attempts to measure G rot began about 15 years ago [2,3], and shortly thereafter very rough values in the correct (presently measured) range were reported [4,5].One way to study rotational damping is to look at correlations in the spectrum in coincidence with a given g-ray energy (the gate). Such spectra show the relative likelihood that g rays are associated with the gating g rays.…”

Rotational damping in a multi-j shell particles-rotor model

“…The gamma-rays which are emitted from the above excited region can not be distinguished as discrete peaks, thus forming a quasi-continuum spectra. Experimentally rotational damping has been studied through the analysis of quasi-continuum spectra [3,4,5,6,7]. Recent experimental progress in high precision three-dimensional gamma-ray correlation measurements makes it possible to study various features of collective rotational motion in the regions of discrete rotational bands and damped rotational motion [8,9,10,11,12,13,14,15].…”

Damping, motional narrowing, and chaos in rotational nuclei

“…Attempts to measure rot began about 20 years ago [18,19] but only the "narrow" component containing a superposition of discrete bands (and some compound-damped bands, unrecognized at that time) were measured. Shortly thereafter it was recognized that there was a second, "wide" component in the spectrum corresponding to rot , having widths in the correct (presently measured) range [20,21].…”

“…With the statistical γ rays subtracted and the spectrum unfolded to remove Compton-scattered γ rays, P nar can be determined by integrating the area of the valley and comparing with the area corresponding to one transition as has been done [21]. However, P nar and µ are interrelated and we believe using a simulation is a more reliable way to determine P nar .…”