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N
1i
Angular Momentum
FIGURE 3
At high energy above the yrast line, a mixed
state of spin I will decay to any one of a
distribution of states at 1-2. This is known
as the "rotational damping" effect.
moment of inertia, such a hole, or "dip," should persist. In fact, no such
dip exists at the higher gamma-ray energies, and it was to explain this
absence that damping6 was first introduced.
Damping modifies the expected behavior such that the observed dip should
be wider, eventually approximating the (inverted) shape of the damping width,
r rot. For rrot values above 300 keV, this dip would be a very broad shallow
feature (the area is conserved, so that as it becomes wider it becomes
shallower). Such a feature would be very difficult to observe in a spectrum
whose shape is not well known. The shape is not well known because the gate
also imposes a strong spin selection (an d perhaps also other selections) that
c 5 affects the shape of the spectrum. To date, there is goad general evidence
-fn damping (or something very much like it), but it has not yet been
ps'sible to measure damping widths directly, and certainly not as a function
$2f excitation energy as would be needed to probe in detail the interesting
in ~
0i io run-_L
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Lee, I-Yang. The Gammasphere, article, January 1, 1990; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1196485/m1/6/: accessed August 15, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.