Gamow-Teller Strength Distributions in {sup 48}Sc by the {sup 48}Ca(p,n) and {sup 48}Ti(n,p) Reactions and Two-Neutrino Double-beta Decay Nuclear Matrix Elements

Journal Article · Fri Jul 03 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.012503· OSTI ID:21347020

Yako, K; Sasano, M; Miki, K; Sakai, H; Noji, S ^[1]; Dozono, M; Ihara, E; Wakasa, T ^[2]; Frekers, D ^[3]; Greenfield, M B ^[4]; Hatanaka, K; Kato, M; Matsubara, H; Okamura, H; Sakemi, Y; Tamii, A ^[5]; Kawabata, T; Sakaguchi, S; Sasamoto, Y; Shimizu, Y ^[6]

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1. Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033 (Japan)
2. Department of Physics, Kyushu University, Higashi, Fukuoka 812-8581 (Japan)
3. Institute fuer Kernphysik, Westfaelische Wilhelms-Universitaet, D-48149 Muenster (Germany)
4. International Christian University, Mitaka, Tokyo 181-8585 (Japan)
5. Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047 (Japan)
6. Center for Nuclear Study, University of Tokyo, Bunkyo, Tokyo 113-0033 (Japan)

The double-differential cross sections for the {sup 48}Ca(p,n) and {sup 48}Ti(n,p) reactions were measured at 300 MeV. A multipole decomposition technique was applied to the spectra to extract the Gamow-Teller (GT) components. The integrated GT strengths up to an excitation energy of 30 MeV in {sup 48}Sc are 15.3+-2.2 and 2.8+-0.3 in the (p,n) and (n,p) spectra, respectively. In the (n,p) spectra additional GT strengths were found above 8 MeV where shell models within the fp shell-model space predict almost no GT strengths, suggesting that the present shell-model description of the nuclear matrix element of the two-neutrino double-beta decay is incomplete.

• OSTI ID: 21347020
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM 48 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DECAY
DIFFERENTIAL CROSS SECTIONS
DOUBLE BETA DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
GAMOW-TELLER RULES
HADRON REACTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
MEV RANGE
NEUTRINOS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR DECAY
NUCLEAR MATRIX
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
PROTON REACTIONS
PROTONS
RADIOISOTOPES
SCANDIUM 48
SCANDIUM ISOTOPES
SHELL MODELS
SPECTRA
TARGETS
TITANIUM 48 TARGET