The {sup 150}Nd({sup 3}He,t) and {sup 150}Sm(t,{sup 3}He) reactions with applications to {beta}{beta} decay of {sup 150}Nd

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.064318· OSTI ID:21502778

Guess, C J; Brown, B A; Deaven, J M; Hitt, G W; Meharchand, R; Zegers, R G. T. ^[1]; Adachi, T; Fujita, H; Hatanaka, K; Hirota, K; Ishikawa, D; Matsubara, H; Okamura, H; Ong, H J; Suzuki, T; Tamii, A; Yosoi, M; Zenihiro, J ^[2]; Akimune, H ^[3]; Algora, A ^[4]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
2. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
3. Department of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501 (Japan)
4. Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia (Spain)

The {sup 150}Nd({sup 3}He,t) reaction at 140 MeV/u and {sup 150}Sm(t,{sup 3}He) reaction at 115 MeV/u were measured, populating excited states in {sup 150}Pm. The transitions studied populate intermediate states of importance for the (neutrinoless) {beta}{beta} decay of {sup 150}Nd to {sup 150}Sm. Monopole and dipole contributions to the measured excitation-energy spectra were extracted by using multipole decomposition analyses. The experimental results were compared with theoretical calculations obtained within the framework of the quasiparticle random-phase approximation, which is one of the main methods employed for estimating the half-life of the neutrinoless {beta}{beta} decay (0{nu}{beta}{beta}) of {sup 150}Nd. The present results thus provide useful information on the neutrino responses for evaluating the 0{nu}{beta}{beta} and 2{nu}{beta}{beta} matrix elements. The 2{nu}{beta}{beta} matrix element calculated from the Gamow-Teller transitions through the lowest 1{sup +} state in the intermediate nucleus is maximally about half that deduced from the half-life measured in 2{nu}{beta}{beta} direct counting experiments, and at least several transitions through 1{sup +} intermediate states in {sup 150}Pm are required to explain the 2{nu}{beta}{beta} half-life. Because Gamow-Teller transitions in the {sup 150}Sm(t,{sup 3}He) experiment are strongly Pauli blocked, the extraction of Gamow-Teller strengths was complicated by the excitation of the 2({h_bar}/2{pi}){omega}, {Delta}L=0, {Delta}S=1 isovector spin-flip giant monopole resonance (IVSGMR). However, the near absence of Gamow-Teller transition strength made it possible to cleanly identify this resonance, and the strength observed is consistent with the full exhaustion of the non-energy-weighted sum rule for the IVSGMR.

• OSTI ID: 21502778
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.064318; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DOUBLE BETA DECAY
ENERGY SPECTRA
EXCITATION
EXCITED STATES
EXTRACTION
GAMOW-TELLER RULES
HALF-LIFE
HELIUM 3
HELIUM 3 REACTIONS
ISOVECTORS
MEV RANGE
MONOPOLES
NEODYMIUM 150 TARGET
PROMETHIUM 150
RANDOM PHASE APPROXIMATION
RESONANCE
SAMARIUM 150 TARGET
SPIN FLIP
SUM RULES
APPROXIMATIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
DECAY
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-ODD NUCLEI
HELIUM ISOTOPES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PROMETHIUM ISOTOPES
RADIOISOTOPES
RARE EARTH NUCLEI
SEPARATION PROCESSES
SPECTRA
STABLE ISOTOPES
TARGETS
TENSORS
VECTORS