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- W2078672337 startingPage "R2917" @default.
- W2078672337 abstract "Data obtained from studies of the $p(densuremath{rightarrow},ensuremath{gamma}{)}^{3}mathrm{He}$ and the $d(pensuremath{rightarrow},ensuremath{gamma}{)}^{3}mathrm{He}$ reactions have been used to extract the transition amplitudes corresponding to $S=1/2$ (doublet) and $S=3/2$ (quartet) $M1$ radiative capture. Protons (deuterons) of 40 keV (80 keV) were stopped in ${mathrm{D}}_{2}mathrm{O}$ $({mathrm{H}}_{2}mathrm{O})$ ice targets. Angular distributions of $ensuremath{sigma}$, ${A}_{y},$ ${T}_{20},$ ${P}_{ensuremath{gamma}}$, and ${mathrm{iT}}_{11}$ were fit simultaneously in terms of the four possible $E1$ $p$-wave capture amplitudes and the two $(S=1/2$ and $3/2)$ possible $M1$ $s$-wave capture amplitudes. The results obtained at ${E}_{mathrm{cm}}=23.3$ keV indicate that the $S=1/2$ $M1$ capture cross section is 13.77 $ifmmodepmelsetextpmfi{}$ 0.66 nb, while the $S=3/2$ $M1$ capture cross section is 6.74 $ifmmodepmelsetextpmfi{}$ 0.44 nb. These results agree with the predictions of a recent three-body theoretical calculation which includes two-body currents [e.g., meson-exchange currents (MEC's)]. They also agree with the previous experimental determination of the doublet and quartet fusion rates obtained using the Wolfenstein-Gerstein effect to vary the relative population of $S=1/2$ and $3/2$ nuclear spins in the $ensuremath{mu}$-$p$-$d$ molecule prior to fusion." @default.
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- W2078672337 date "1997-12-01" @default.
- W2078672337 modified "2023-09-23" @default.
- W2078672337 title "Direct determination of the doublet and quartet<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>M</mml:mi><mml:mn>1</mml:mn><mml:mn /></mml:math>cross sections in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>p</mml:mi></mml:math>-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>d</mml:mi></mml:math>radiative capture at near-thermal energies" @default.
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- W2078672337 doi "https://doi.org/10.1103/physrevc.56.r2917" @default.
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