Cross sections and analyzing powers for (p,n) reactions on {sup 3}He and {sup 4}He at 346 MeV

Journal Article · Fri Aug 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.024607· OSTI ID:21192119

Ihara, E; Wakasa, T; Dozono, M; Imamura, T; Kuroita, S; Noro, T; Sagara, K; Sueta, T; Tanabe, H; Yamada, Y ^[1]; Hatanaka, K; Kato, M; Matsubara, H; Okamura, H; Tameshige, Y; Tamii, A ^[2]; Sakemi, Y ^[3]; Sekiguchi, K; Suda, K ^[4]

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1. Department of Physics, Kyushu University, Higashi, Fukuoka 812-8581 (Japan)
2. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
3. Cyclotron and Radioisotope Center, Tohoku University, Sendai, Miyagi 980-8578 (Japan)
4. RIKEN Nishina Center, Wako, Saitama 351-0198 (Japan)

The cross sections and analyzing powers for (p,n) reactions on {sup 3}He and {sup 4}He have been measured at a bombarding energy of T{sub p}=346 MeV and reaction angles of {theta}{sub lab}=9.4 deg. - 27 deg. The energy transfer spectra for {sup 3}He(p,n) at large {theta}{sub lab} ({>=}16 deg.) are dominated by quasielastic contributions and can be reasonably reproduced by plane-wave impulse approximation (PWIA) calculations for quasielastic scattering. By contrast, the known L=1 resonances in {sup 4}Li are clearly observed near the threshold in the {sup 4}He(p,n) spectra. Because these contributions are remarkable at small angles, the energy spectra are significantly different from those expected for quasielastic scattering. The data are compared with the PWIA calculations, and it is found that the quasielastic contributions are dominant at large {theta}{sub lab} ({>=}22 deg.). The nuclear correlation effects on the quasielastic peak for {sup 4}He(p,n) are also discussed.

• OSTI ID: 21192119
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRELATIONS
CROSS SECTIONS
ENERGY SPECTRA
ENERGY TRANSFER
HELIUM 3 TARGET
HELIUM 4 TARGET
IMPULSE APPROXIMATION
LITHIUM 4
MEV RANGE 100-1000
POLARIZATION-ASYMMETRY RATIO
PROTON-NEUTRON INTERACTIONS
QUASI-ELASTIC SCATTERING
RESONANCE
SIMULATION
WAVE PROPAGATION