350 research outputs found
Study of nuclear correlation effects via 12C(p,n)12N(g.s.,1+) at 296 MeV
We report measurements of the cross section and a complete set of
polarization observables for the Gamow--Teller reaction at a bombarding
energy of 296 MeV.
The data are compared with distorted wave impulse approximation calculations
employing transition form factors normalized to reproduce the observed
beta-decay value.
The cross section is significantly under-predicted by the calculations at
momentum transfers 0.5 .
The discrepancy is partly resolved by considering the non-locality of the
nuclear mean field. However, the calculations still under-predict the cross
section at large momentum transfers of 1.6 .
We also performed calculations employing random phase approximation response
functions and found that the observed enhancement can be attributed in part to
pionic correlations in nuclei.Comment: 5 figures, submitted to Phys. Lett.
Measurement of Decay α Particles from the 15.1 MeV 0+ State in 16O via the 12C(16O,16O*[α + X])12C Reaction
Measurements of the charge-to-mass ratio of particles trapped by the Paul Trap for education
Paul traps are devices that confine particles using an oscillating electric
field and have been used in undergraduate experimental classes at universities.
Owing to the requirement of a high voltage of several thousand volts, no cases
of use in middle and high schools are available. Therefore, we developed an
all-in-one-type Paul trap device that included a high-voltage transformer. The
Paul trap can be equipped with three different types of electrode attachments,
ring-type, and linear-type , and the trap image can be observed using a
built-in web camera. For example, the charge-to-mass ratio of particles was
measured with different types of attachments, and it was shown that reasonable
values could be obtained. This type of trap is currently used at several
educational facilities in Japan.Comment: 6 pages, 12 figure
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