PT Journal
AU n_TOF Collaboration
   Gunsing, F
   Berthoumieux, E
   Borella, A
   Belgya, T
   Szentmiklosi, L
   Schillebeeckx, P
   Drohe, JC
   Wynants, R
   Colonna, N
   Marrone, S
   Tagliente, G
   Terlizzi, R
   Domingo-Pardo, C
   Tain, JL
   Martinez, T
   Massimi, C
   Mastinu, PM
   Milazzo, PM
TI Neutron Capture on (209)Bi: Determination of the Production Ratio of (210m)Bi/(210g)Bi
SO Journal of the Korean Physical Society
JI J. Korean Phys. Soc.
PY 2011
BP 1670
EP 1675
VL 59
IS 2
DI 10.3938/jkps.59.1670
LA English
DE ND2010; Nuclear data; Neutron capture; Branching ratio; Statistical decay; (209)Bi; (210)Bi; (210)Po
AB Neutron capture on (209)Bi produces either an isomeric state (210m)Bi with a half life of 3 x 106 years, or the ground state (210g)Bi which decays with a half life of 5 days to the alpha emitter (210)Po. Therefore the neutron capture cross section ratio (209)Bi(n,gamma)(210m)Bi/(210g)Bi plays an important role in predicting the short- and long-term radio-toxicity produced by (209)Bi under neutron irradiation. This ratio is dependent on the neutron energy. We have measured this ratio for cold neutrons at the cold neutron beam facility of the Budapest Neutron Centre by observing the population of the ground-and the metastable state using high resolution gamma-ray spectroscopy. The same technique has been used at the pulsed white neutron source GELINA of the IRMM, Geel in combination with the neutron time-of-flight technique. Results for the neutron-energy dependent branching ratio will be presented. In addition we performed simulations using a statistical decay code.
ER