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- W1619888482 abstract "The reaction $^{10}mathrm{B}(d,{d}^{ensuremath{'}})^{10}mathrm{B}$ was investigated to determine the isobaric-spin violation in exciting the lowest $T=1$ state of $^{10}mathrm{B}$ at an excitation energy of 1.74 MeV. The extent and nature of the isobaric-spin-forbidden reaction was obtained by measuring yield curves at laboratory angles of 30, 45, and 77ifmmode^circelsetextdegreefi{}, using deuteron bombarding energies from 5 to 12 MeV and at 140ifmmode^circelsetextdegreefi{} from 6.5 to 16 MeV. Simultaneously, data were obtained on the nearby isobaricspin-allowed $T=0$ state at 2.15 MeV. Generally, broad structure dominates the excitation functions at all angles but tends to disappear at higher bombarding energies. Angular distributions of deuterons leading both to the $T=0$ and $T=1$ states were obtained at five bombarding energies between 6.5 and 12.0 MeV. The angular distributions both for the forbidden ($T=1$) and allowed ($T=0$) state are characterized by a trend to forward peaking with increasing bombarding energies although much less so for the $T=1$ state. The total cross sections were measured, and the ratios of the forbidden yield to allowed yield were found to decrease linearly from 0.69% at 6.5 MeV to 0.16% at 12 MeV. In an attempt to describe the angular distributions in terms of a direct-reaction mechanism, distorted-wave Born-approximation (DWBA) calculations were performed assuming collective excitations for the residual nucleus. No clear physical interpretation could be derived from these calculations. Indications are that the reaction $^{10}mathrm{B}(d,{d}^{ensuremath{'}})^{10}mathrm{B}$ proceeds through states very high in the compound nucleus $^{12}mathrm{C}$, where the isobaric-spin violation originates in Coulomb mixing of $T=1$ and $T=0$ states of the same spin and parity. In view of the very small yield of deuterons leading to the lowest $T=1$ state in $^{10}mathrm{B}$, and in view of the background difficulties anticipated and experienced, a specialized charged-particle detection system was used, consisting of a position-sensitive gas proportional counter mounted on the focal surface of a broad-range magnetic spectrograph. This constitutes the first observation of the lowest $T=1$ state in $^{10}mathrm{B}$ by the present reaction.[NUCLEAR REACTIONS $^{10}mathrm{B}(d,{d}^{ensuremath{'}})$, $E=5ensuremath{-}16$ MeV; measured $ensuremath{sigma}(E,ensuremath{theta})$; ratio isobaric-spin allowed-forbidden. Enriched targets. DWBA analysis; $ensuremath{theta}=10ensuremath{-}{150}^{ensuremath{circ}}$.]" @default.
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- W1619888482 title "Isobaric-spin violation in the reaction<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>B</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>10</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>(</mml:mo><mml:mi>d</mml:mi><mml:mo>,</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:…" @default.
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- W1619888482 doi "https://doi.org/10.1103/physrevc.9.102" @default.
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