Studies of excited state in {sup 11}Li. Spectroscopy of {sup 7}He

Journal Article · Mon Dec 21 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57212· OSTI ID:21207733

Korsheninnikov, A A; Golovkov, M S; Ozawa, A; Yoshida, K; Tanihata, I; Fulop, Z; Kusaka, K; Morimoto, K; Otsu, H; Petrascu, H; Tokanai, F ^[1]; Kuzmin, E A; Nikolskii, E Yu; Novatskii, B G; Ogloblin, A A ^[2]

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1. RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan)
2. Kurchatov Institute, Kurchatov sq. 1, 123182 Moscow (Russian Federation)

(i) The excited state of {sup 11}Li at E*{approx}1.3 MeV observed in the proton inelastic scattering was recently reinterpreted in terms of shakeoff mechanism with proton scattering on the {sup 9}Li-core. However, the observed peak has constant excitation energy along its kinematical locus. This fact represents the most important criterion of excited state. This constant energy contradicts to the shakeoff mechanism. (ii) Preliminary results of recent spectroscopic studies of {sup 7}He and {sup 7}H are reported. The excited state of {sup 7}He was observed (E*=2.9{+-}0.3 MeV, {gamma}=2.2{+-}0.3 MeV, {gamma}{sub {alpha}}/{gamma}{sub tot}=0.85{+-}0.15). This state has unexpected structure resulting in decay into the channel {alpha}+3n, but not into {sup 6}He+n. Hint on a possible existence of resonance {sup 7}H was obtained.

• OSTI ID: 21207733
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 455; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ELECTRONS
EXCITATION
EXCITED STATES
HELIUM 6
HELIUM 7
HYDROGEN 7
INELASTIC SCATTERING
LITHIUM 11
LITHIUM 11 TARGET
LITHIUM 9
MEV RANGE
NUCLEAR DECAY
NUCLEAR STRUCTURE
PROTON REACTIONS
PROTON SPECTRA
PROTON-NUCLEON INTERACTIONS
PROTONS
RADIOACTIVE ION BEAMS
RESONANCE