Negative muon spin rotation experiment Page: 3 of 11
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Counter system
(Top view)
\E s 'x \
Pole piece
Polyethylene srnie
absorber
(Side view)
PbCu
Al
c= p-Beam E s3
BDuc
Polyethylene
absor ber
Fig. 2. Experimental setup for p-SR at the 184" cyclotron of Lawrence Berkeley
Laboratory. All the counters were plastic scintillators connected to RCA
8575 phototubes through photoguides. These counters were placed between
two pole pieces of the 9-inch Varian magnet with its gap of 7.6 cm. The
Al and A2 counters (3 mm thick) were fixed to the surfaces of the pole
pieces in order to eliminate the background from the iron cores. The fast
logic was as follows:
"stopped " = B-M-S1-(S2X + Al + A2),
"decay e" = S2X-S2-E-S3-(B + M + S1 + Al + A2)
bound electrons, it is straightforward to study this effect in the ground state of muonic
atom which consists of one muon in the 1s1/2 state and a zero-spin nucleus. In the
muonic case the finite nuclear size has to be taken into account, as calculated by Ford
et al.' The first observation of the Breit effect was reported by Hutchinson et al.'
who determined the g factors of tiw bound muons in light elements up to Z = 16. We
extended such measurements to heavier nuclei, where greater effects are expected, but
it became exceedingly difficult to determine the g factors precisely because of the
shorter lifetimes and the smaller yields of decay electrons. The results reported by-3-
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Yamazaki, T.; Nagamine, K.; Nagamiya, S. & Hashimoto, O. Negative muon spin rotation experiment, article, June 1, 1975; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc880890/m1/3/: accessed March 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.