New insight into the low-energy $^9$He spectrum

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dc.creatorGolovkov, M. S.
dc.creatorGrigorenko, L. V.
dc.creatorFomichev, A. S.
dc.creatorGorshkov, A. V.
dc.creatorGorshkov, V. A.
dc.creatorKrupko, S. A.
dc.creatorOganessian, Yu. Ts.
dc.creatorRodin, A. M.
dc.creatorSidorchuk, S. I.
dc.creatorSlepnev, R. S.
dc.creatorStepantsov, S. V.
dc.creatorTer-Akopian, G. M.
dc.creatorWolski, R.
dc.creatorKorsheninnikov, A. A.
dc.creatorNikolskii, E. Yu.
dc.creatorKuzmin, V. A.
dc.creatorNovatskii, B. G.
dc.creatorStepanov, D. N.
dc.creatorFortier, S.
dc.creatorRoussel-Chomaz, P.
dc.creatorMittig, W.
dc.date2006-08-17
dc.date.accessioned2026-07-07T10:42:40Z
dc.date.available2026-07-07T10:42:40Z
dc.descriptionThe spectrum of $^9$He was studied by means of the $^8$He($d$,$p$)$^9$He reaction at a lab energy of 25 MeV/n and small center of mass (c.m.) angles. Energy and angular correlations were obtained for the $^9$He decay products by complete kinematical reconstruction. The data do not show narrow states at $\sim $1.3 and $\sim $2.4 MeV reported before for $^9$He. The lowest resonant state of $^9$He is found at about 2 MeV with a width of $\sim $2 MeV and is identified as $1/2^-$. The observed angular correlation pattern is uniquely explained by the interference of the $1/2^-$ resonance with a virtual state $1/2^+$ (limit on the scattering length is obtained as $a > -20$ fm), and with the $5/2^+$ resonance at energy $\geq 4.2$ MeV.
dc.description5 pages, 4 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/nucl-ex/0608035
dc.identifierhttp://arxiv.org/abs/nucl-ex/0608035
dc.identifierPhys.Rev.C76:021605,2007
dc.identifierdoi:10.1103/PhysRevC.76.021605
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182024
dc.subjectNuclear Experiment
dc.titleNew insight into the low-energy $^9$He spectrum
dc.typetext

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