Gamow-teller strengths of the inverse beta transition 176Yb-->176Lu for spectroscopy of proton-proton and other sub-MeV solar neutrinos
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.
Fujiwara
M
Research Center for Nuclear Physics, Osaka University, Mihogaoka 10-1, Ibaraki, Osaka 657-0047, Japan and Advanced Science Research Center, JAERI, Tokai, Ibaraki, 319-1195 Japan.
Akimune
H
van Den Berg AM
Cribier
M
Daito
I
Ejiri
H
Fujimura
H
Fujita
Y
Goodman
CD
Hara
K
Harakeh
MN
Ihara
F
Ishikawa
T
Janecke
J
Kawabata
T
Raghavan
RS
Schwarz
K
Tanaka
M
Yamanaka
T
Yosoi
M
Zegers
RG