Halo excitation of {sup 6}He in inelastic and charge-exchange reactions

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, C

OSTI ID:560983

Four-body distorted wave theory appropriate for nucleon-nucleus reactions leading to three-body continuum excitations of two-neutron Borromean halo nuclei is developed. The peculiarities of the halo bound state and three-body continuum are fully taken into account by using the method of hyperspherical harmonics. The procedure is applied for A=6 test-bench nuclei; thus we report detailed studies of inclusive cross sections for inelastic {sup 6}He(p,p{sup {prime}}){sup 6}He{sup *} and charge-exchange {sup 6}Li(n,p){sup 6}He{sup *} reactions at nucleon energy 50 MeV. The theoretical low-energy spectra exhibit two resonancelike structures. The first (narrow) is the excitation of the well-known 2{sup +} three-body resonance. The second (broad) bump is a composition of overlapping soft modes of multipolarities 1{sup {minus}},2{sup +},1{sup +},0{sup +} whose relative weights depend on transferred momentum and reaction type. Inelastic scattering is the most selective tool for studying the soft dipole excitation mode. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 560983
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUND STATE
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
DWBA
ENERGY SPECTRA
EXCITATION
FOUR-BODY PROBLEM
HARMONICS
HELIUM 6
HELIUM 6 TARGET
INELASTIC SCATTERING
LITHIUM 6 TARGET
MOMENTUM TRANSFER
NEUTRON REACTIONS
NUCLEAR HALOS
NUCLEON REACTIONS
PROTON REACTIONS
RESONANCE
THREE-BODY PROBLEM