We review and analyze the available information on the nuclear-fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wherever possible, estimates of the uncertainties. We also describe the most important experiments and calculations that are required in order to improve our knowledge of solar fusion rates. [S0034-6861(98)00704-1]
The anomalous magnetic moment of the muon is one of the most precisely measured quantities in experimental particle physics. Its latest measurement at Brookhaven National Laboratory deviates from the Standard Model expectation by approximately 3.5 standard deviations. The goal of the new experiment, E989, now under construction at Fermilab, is a fourfold improvement in precision. Here, we discuss the details of the future measurement and its current status.
We present details of a high-accuracy absolute scalar magnetometer
based on pulsed proton NMR. The B-field magnitude is determined
from the precession frequency of proton spins in a cylindrical
sample of water after accounting for field perturbations from
probe materials, sample shape, and other corrections. Features of the design,
testing procedures, and corrections necessary for qualification
as an absolute scalar magnetometer are described. The device was
tested at B = 1.45 T but can be modified for a range exceeding
1–3 T. The magnetometer was used to calibrate other NMR magnetometers
and measure absolute magnetic field magnitudes to an accuracy
of 19 parts per billion as part of a measurement of the muon
magnetic moment anomaly at Fermilab.
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