6533b837fe1ef96bd12a29f2

RESEARCH PRODUCT

Invariant-mass spectroscopy of $^{10}$Li and $^{11}$Li

A.c. MuellerH. IrnichR. KulessaK. RiisagerA. MagelP. G. HansenThomas NilssonK. StelzerJ. V. KratzC. ScheidenbergerGöran Hugo NymanY. LeifelsBjörn JonsonAchim RichterG. SchriederE. ZudeHerbert A. SimonE. WajdaL. V. ChulkovD. Guillemaud-muellerTh. W. ElzeH. EmlingH. LenskeMarkus ZinserM. J. G. BorgeF. HumbertThomas AumannG. MünzenbergHans GeisselOlof TengbladJ. CubA. SurowiecJoachim StrothF. NickelW. SchwabR. Holzmann

subject

PhysicsNuclear reactionNuclear and High Energy Physics010308 nuclear & particles physics[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex]Nuclear Theory[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesIon0103 physical sciencesInvariant massNeutronAtomic physicsMultiplicity (chemistry)Nuclear Experiment010306 general physicsNucleonSpectroscopyExcitationNuclear Physics

description

Break-up of secondary Li-11 ion beams (280 MeV/nucleon) on C and Pb targets into Li-9 and neutrons is studied experimentally. Cross sections and neutron multiplicity distributions are obtained, characterizing different reaction mechanisms. Invariant-mass spectroscopy for Li-11 and Li-10 is performed. The E1 strength distribution, deduced from electromagnetic excitation of Li-11 up to an excitation energy of 4 MeV comprises similar to 8% of the Thomas-Reiche-Kuhn energy-weighted sumrule strength. Two low-lying resonance-like structures are observed for Li-10 at decay energies of 0.21(5) and 0.62(10) MeV, the former one carrying 26(10)% of the strength and likely to be associated with an s-wave neutron decay. A strong di-neutron correlation in Li-11 can be discarded. Calculations in a quasi-particle RPA approach are compared with the experimental results for Li-10 and Li-11. (C) 1997 Elsevier Science B.V.

yearjournalcountryeditionlanguage
1997-06-01
http://hal.in2p3.fr/in2p3-00000808