The Measurement of the 206Pb(n, gamma) Cross Section and Stellar Implications

The neutron capture cross section of 206Pb has been measured at the CERN n TOF spectrometer using a setup of two C6D6 detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, which were analyzed via the R-matrix analysis code SAMMY. In the relevant energy ranges for stellar nucleosynthesis, i.e., at thermal energies of kT = 8 keV and kT = 23 keV, the present Maxwellian average cross section differs by 20% and 9% from the recommended values of Bao et al respectively. From the new cross section the s-abundance of 206Pb could be reliably determined as 70(4)%. This result is of importance in order to test and constrain r-process abundance calculations in the actinide region, because the r-process portion of 206Pb is dominated by alpha-back decays of short-lived transbismuth isotopes.

DOMINGO PARDO C.;  ABBONDANNO U.;  AERTS G.;  ALVAREZ H.;  ALVAREZ-VELARDE F.;  ANDRIAMONJE S.;  ANDRZEJEWSKI J.;  ASSIMAKOPOULOS P.;  AUDOUIN L.;  BADUREK G.;  BAUMANN P.;  BECVAR F.;  BERTHOUMIEUX E.;  BISTERZO S.;  CALVINO F.;  CALVIANI M.;  CANO-OTT D.;  CAPOTE R.;  CARRAPICO C.;  CENNINI P.;  CHEPEL V.;  COLONNA N.;  CORTES G.;  COUTURE A.;  COX J.;  DAHLFORS M.;  DAVID S.;  DILLMANN I.;  DRIDI W.;  DURAN I.;  ELEFTHERIADIS C.;  EMBID-SEGURA M.;  FERRANT L.;  FERRARI A.;  FERREIRA-MARQUES R.;  FUJII K.;  FURMAN W.;  GALLINO R.;  GONCALVES I.;  GONZALEZ-ROMERO E.;  GRAMEGNA F.;  GUERRERO C.;  GUNSING F.;  HAAS B.;  HAIGHT R.;  HEIL M.;  HERRERA-MARTINEZ A.;  IGASHIRA M.;  JERICHA E.;  KADI Y.;  KAEPPELER F.;  KARADIMOS D.;  KARAMANIS D.;  KERVENO M.;  KOEHLER P.;  KOSSIONIDES E.;  KRTICKA M.;  LAMBOUDIS C.;  LEEB H.;  LINDOTE A.;  LOPES I.;  LOZANO M.;  LUKIC S.;  MARGANIEC J.;  MARRONE S.;  MASSIMI C.;  MASTINU P.;  MENGONI A.;  MILAZZO P. M.;  MOSCONI M.;  NEVES F.;  OBERHUMMER H.;  O'BRIEN S.;  PANCIN J.;  PAPACHRISTODOULOU C.;  PAPADOPOULOS C.;  PARADELA C.;  PATRONIS N.;  PAVLIK A.;  PAVLOPOULOS P.;  PERROT L.;  PIGNI M. T.;  PLAG R.;  PLOMPEN Arjan;  PLUKIS A.;  POCH A.;  PRETEL C.;  QUESADA J.;  RAUSCHER T.;  REIFARTH R.;  RUBBIA C.;  RUDOLF G.;  RULLHUSEN Peter;  SALGADO J.;  SANTOS C.;  SARCHIAPONE L.;  SAVVIDIS I.;  STEPHAN C.;  TAGLIENTE G.;  TAIN J. L.;  TASSAN-GOT L.;  TAVORA L.;  TERLIZZI R.;  VANNINI G.;  VAZ P.;  VENTURA A.;  VILLAMARIN D.;  VINCENTE M. C.;  VLACHOUDIS V.;  VLASTOU R.;  VOSS F.;  WALTER S.;  WIESCHER M.;  WISSHAK K.; 

2010-01-13

IOP PUBLISHING LTD

JRC56261

0954-3899,   

http://iopscience.iop.org/0954-3899/35/1/014020/?ejredirect=.iopscience,    https://publications.jrc.ec.europa.eu/repository/handle/JRC56261,   

10.1088/0954-3899/35/1/014020,