High-resolution study of the {sup 9}Be({sup 3}He,t){sup 9}B reaction up to the {sup 9}B triton threshold

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.014308· OSTI ID:21596554

Scholl, C; Brentano, P von ^[1]; Fujita, Y; Fujita, H ^[2]; Adachi, T ^[2]; Gorska, M ^[3]; Hashimoto, H; Hatanaka, K; Ohta, T; Shimizu, Y; Tameshige, Y; Tamii, A ^[4]; Matsubara, H ^[4]; Nakanishi, K ^[5]; Sakemi, Y ^[4]; Shimbara, Y ^[6]; Yosoi, M ^[7]; Zegers, R G. T. ^[6]

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1. Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln (Germany)
2. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
3. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
4. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
5. Center for Nuclear Study, University of Tokyo, RIKEN Campus, Wako, Tokyo 351-0198 (Japan)
6. NSCL, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
7. Department of Physics, Kyoto University, Sakyo, Kyoto 606-8502 (Japan)

A high-energy-resolution {sup 9}Be({sup 3}He,t){sup 9}B charge-exchange reaction was performed around a scattering angle of 0 deg. and at an intermediate incident energy of 140 MeV/nucleon for the study of precise Gamow-Teller (GT) transition strengths. The energy resolution of 30 keV allowed a precise deconvolution of the spectrum and the determination of angular distributions of cross sections, excitation energies, and decay widths. The GT strength of 10 states has been determined for the first time using the GT strength of the analogous {beta} decays of {sup 9}Li and {sup 9}C as standards. The large difference between the GT strengths going to the low-lying T=1/2 and the highly excited T=3/2 states is interpreted as a result of their different spatial structures. The obtained GT strength distribution is compared to the results of a (p,n) experiment with lower resolution performed in the 1980s. In particular, the width of the 16.8 MeV, J{sup {pi}=}(5/2{sup +}) state has been determined for the first time.

• OSTI ID: 21596554
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.014308; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BERYLLIUM 9 TARGET
BORON 9
CARBON 9
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
ENERGY RESOLUTION
EXCITATION
GAMOW-TELLER RULES
HELIUM 3 REACTIONS
LITHIUM 9
MEV RANGE 100-1000
NUCLEAR DECAY
NUCLEONS
SCATTERING
SPECTRA
TRITONS
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON ISOTOPES
CARBON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FERMIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MEV RANGE
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
RESOLUTION
TARGETS