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Gamow-Teller Strengths of the Inverse Beta Transition Y 176 b → L 176 <…

2000; American Physical Society; Volume: 85; Issue: 21 Linguagem: Inglês

10.1103/physrevlett.85.4442

ISSN

1092-0145

Autores

M̄. Fujiwara, H. Akimune, A. M. van den Berg, M. Cribier, I. Daito, H. Ejiri, H. Fujimura, Y. Fujita, C.D. Goodman, K. Hara, M.N. Harakeh, F. Ihara, T. Ishikawa, J. Jänecke, T. Kawabata, R. S. Raghavan, K. Schwarz, M. Tanaka, T. Yamanaka, M. Yosoi, R. G. T. Zegers,

Tópico(s)

Quantum, superfluid, helium dynamics

Resumo

Discrete Gamow-Teller (GT) transitions 176Yb-->176Lu at low excitation energies have been measured via the ( 3He,t) reaction at 450 MeV and at 0 degrees. For 176Yb, two low-lying states are observed, setting low thresholds Q(nu) = 301 and 445 keV for neutrino ( nu) capture. Capture rates estimated from the measured GT strengths, the simple two-state excitation structure, and the low Q(nu) in Yb-Lu indicate that Yb-based nu detectors are well suited for a direct measurement of the sub-MeV solar electron-neutrino ( nu(e)) spectrum including pp neutrinos.

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