Invariant-mass spectroscopy of Li-10 and Li-11
| Autor: | Zinser, M., Humbert, F., Nilsson, T., Schwab, W., Simon, H., Aumann, T., García Borge, María José, Chulkov, L. V., Cub, J., Elze, Th. W., Emling, H., Geissel, H., Guillemaud-Mueller, D., Holzmann, R., Irnich, H., Jonson, B., Kratz, J. V., Kulessa, R., Leifels, Y., Lenske, H., Magel, A., Mueller, A. C., Münzenberg, G., Nickel, F., Nyman, G., Richter, Achim W., Riisager, K., Scheidenberger, C., Schrieder, G., Stelzer, K., Stroth, J., Surowiec, A., Tengblad, Olof, Wajda, E., Zude, E. |
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| Rok vydání: | 1997 |
| Předmět: |
Breakup σ
Li-11 Li-10 deduced resonances [PACS] Coulomb excitation 6 ≤ A ≤ 19 [[PACS] Properties of specific nuclei listed by mass ranges] [PACS] Properties of specific nuclei listed by mass ranges:6 ≤ A ≤ 19 Decay features [PACS] Projectile and target fragmentation Nuclear Reactions C Pb(Li-11 xn) E=280 MeV/nucleon Measured neutron multiplicity γ-decay associated sum-rule strengths |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 26 pages, 5 tables, 10 figures.-- PACS nrs.: 25.60.+v; 27.20.+n; 25.70.Mn; 25.70.De. 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 ~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. The authors are indebted to the staff personel of the GSI accelerator group and of the target laboratory for their support. We acknowledge support by the German Federal Minister for Research and Technology (BMBF) under Contracts 06DA 665 I, 06OF 112 and 06MZ 465, by GSI under Contracts DA RIK, OF ELZ, MZ KRK, by the Polish Committee of Scientific Research under Contract PBZ/PB03 / 113/09, EC under contract ERBCHGE-CT92-0003 and by the Spanish CICYT under contract AEN92-0788-C02-02(MJGB). |
| Databáze: | OpenAIRE |
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