Production of double-Λ hypernuclei at (K−, K+) reaction points and their pionic decays

Yamamoto, Yasuo; Wakai, M.; Motoba, T.; Fukuda, T.

doi:10.1016/s0375-9474(97)00483-1

Cited by 32 publications

(31 citation statements)

References 37 publications

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“…We showed the example when not only the ΛΛ − ΞN coupling interaction, but also the Ξ-nucleus diagonal potential, is essential for ΛΛ hypernuclear properties. On the other hand, the same ΛΛ − ΞN potential is responsible for conversion widths of Ξ hypernuclei whereas branching ratios of conversion channels depend substantially on the ΛΛ potential [45].…”

Section: Discussionmentioning

confidence: 99%

Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment

Lanskoy

Yamamoto

2004

Phys. Rev. C

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Properties of hypernuclei 5ΛΛ H and 5 ΛΛ He are studied in a two-channel approach with explicit treatment of coupling of channels 3 Z + Λ + Λ and α + Ξ. Diagonal ΛΛ and coupling ΛΛ − ΞN interactions are derived within G-matrix procedure from Nijmegen meson-exchange models. Bond energy ∆BΛΛ in 5 ΛΛ He exceeds significantly that in 5 ΛΛ H due to the channel coupling. Diagonal Ξα attraction amplifies the effect, which is sensitive also to Λ-core interaction. The difference of the ∆BΛΛ values can be an unambiguous signature of the ΛΛ − ΞN coupling in ΛΛ hypernuclei. However, improved knowledge of the hyperon-nucleus potentials is needed for quantitative extraction of the coupling strength from future data on the ΛΛ hypernuclear binding energies.

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Section: Discussionmentioning

confidence: 99%

Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment

Lanskoy

Yamamoto

2004

Phys. Rev. C

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“…Although the probability that the secondary Ξ − reactions to occur in the same nucleus is not so high, it is comparable (≈ 0.3%) to the first method. 34) This reaction mechanism was utilized in BNL E906 experiment. 35) There is another possibility to implant S = −2 in the (K − , K + ) reaction populating Ξ hypernuclear bound states directly.…”

Section: Perspectives Of the Weak Decay Experiments At J-parcmentioning

confidence: 99%

“…34), which also discussed identification with sequential pionic decays. Light hyperfragments have significant pionic weak decay widths as large as 10%.…”

Section: Double λ Hypernucleimentioning

confidence: 99%

Experimental Progress in Hypernuclear Physics

Nagae

2010

Prog. Theor. Phys. Suppl.

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“…For heat generation by the fission reaction, 90% of the fission energy is the kinetic energy of fission fragments and is converted into heat in the fuel salt (11) . The remaining 10% of the fission energy is emitted as the kinetic energy of fast neutrons and γ-ray energy and changes into heat in both the fuel salt and the graphite moderator due to their high permeability.…”

Section: Heat Transfermentioning

confidence: 99%

Steady State Analysis of Small Molten Salt Reactor (Effect of Fuel Salt Flow on Reactor Characteristics)

Yamamoto

Mitachi

Suzuki

2005

JSME international journal. Ser. B, Fluids and thermal engineer

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The Molten Salt Reactor (MSR) is a thermal neutron reactor with graphite moderation and operates on the thorium-uranium fuel cycle. The feature of the MSR is that fuel salt flows inside the reactor during the nuclear fission reaction. In the previous study, the authors developed numerical model with which to simulate the effects of fuel salt flow on the reactor characteristics. In this study, we apply the model to the steady-state analysis of a small MSR system and estimate the effects of fuel flow. The model consists of two-group neutron diffusion equations for fast and thermal neutron fluxes, transport equations for six-group delayed neutron precursors and energy conservation equations for fuel salt and the graphite moderator. The following results are obtained: (1) in the rated operation condition, the peaks of the neutron fluxes slightly move toward the bottom from the center of the reactor and the delayed neutron precursors are significantly carried by the fuel salt flow, and (2) the extension of residence time in the external-loop system and the rise of the fuel inflow temperature show weak negative reactivity effects, which decrease the neutron multiplication factor of the small MSR system.

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Production of double-Λ hypernuclei at (K−, K+) reaction points and their pionic decays

Cited by 32 publications

References 37 publications

Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment

Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment

Experimental Progress in Hypernuclear Physics

Steady State Analysis of Small Molten Salt Reactor (Effect of Fuel Salt Flow on Reactor Characteristics)

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