Gamma-Ray Spectroscopy of $^{16}_Λ$O and $^{15}_Λ$N Hypernuclei via the $^{16}$O$(K^-, π^-)$ reaction

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dc.creatorUkai, M.
dc.date2008-02-18
dc.date.accessioned2026-07-07T11:40:20Z
dc.date.available2026-07-07T11:40:20Z
dc.descriptionhe bound-state level structures of the $^{16}_Λ$O and $^{15}_Λ$N hypernuclei were studied by $γ$-ray spectroscopy using a germanium detector array (Hyperball) via the $^{16}$O ($K^-, π^- γ$) reaction. A level scheme for $^{16}_Λ$O was determined from the observation of three $γ$-ray transitions from the doublet of states ($2^-$,$1^-$) at $\sim 6.7$ MeV to the ground-state doublet ($1^-$,$0^-$). The $^{15}_Λ$N hypernuclei were produced via proton emission from unbound states in $^{16}_Λ$O . Three $γ$ -rays were observed and the lifetime of the $1/2^+;1$ state in $^{15}_Λ$N was measured by the Doppler shift attenuation method. By comparing the experimental results with shell-model calculations, the spin-dependence of the $ΛN$ interaction is discussed. In particular, the measured $^{16}_Λ$O ground-state doublet spacing of 26.4 $\pm$ 1.6 $\pm$ 0.5 keV determines a small but nonzero strength of the $ΛN$ tensor interaction.
dc.description22 pages, 17 figures
dc.identifierhttps://arxiv.org/abs/0802.2464
dc.identifierhttp://arxiv.org/abs/0802.2464
dc.identifierPhys.Rev.C77:054315,2008
dc.identifierdoi:10.1103/PhysRevC.77.054315
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200226
dc.subjectNuclear Experiment
dc.titleGamma-Ray Spectroscopy of $^{16}_Λ$O and $^{15}_Λ$N Hypernuclei via the $^{16}$O$(K^-, π^-)$ reaction
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