Measurement of the 154Gd(n, γ) cross section and its astrophysical implications

The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modeling. We report a value of 880(50) mb for the MACS at kT = 30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

MAZZONE A.;  CRISTALLO S.;  ABERLE O.;  ALAERTS Gery;  ALCAYNE V.;  AMADUCCI S;  ANDRZEJEWSKI J.;  AUDOUIN L.;  BABIANO-SUAREZ V.;  BACAK M.;  BARBAGALLO M;  BECARES V.;  BECVAR F.;  BELLIA G.;  BERTHOUMIEUX E.;  BILLOWES J.;  BOSNAR D.;  BROWN S;  BUSSO M.;  CAAMANO M.;  CABALLERO L.;  CALVIANI M.;  CALVIÑO F.;  CANO-OTT D.;  CASANOVAS A.;  CASTELLUCCIO D. M.;  CERUTTI F.;  CHEN Y. H.;  CHIAVERI E.;  CLAI G.;  COLONNA N.;  CORTÉS G. P.;  CORTES-GIRALDO M. A.;  COSENTINO Luigi;  DAMONE L.;  DIAKAKI M.;  DIETZ M.;  DOMINGO-PARDO C.;  DRESSLER R.;  DUPONT E.;  DURAN I.;  ELME Z.;  FERNÁNDEZ-DOMÍNGEZ B.;  FERRARI A.;  GONCALVES I. F.;  FINOCCHIARO Paolo;  FURMAN V.;  GARG R.;  GAWLIK A.;  GILARDONI S.;  GLODARIU T.;  GÖBEL K.;  GONZÁLEZ-ROMERO E.;  GUERRERO C.;  GUNSING F.;  HEINITZ S.;  HEYSE Jan;  JENKINS D. G.;  JERICHA E.;  KADI Y.;  KAPPELER F.;  KIMURA A.;  KIVEL N.;  KOKKORIS M.;  KOPATCH Y.;  KOPECKY Stefan;  KRTICKA M.;  KURTULGIL D.;  LADARESCU I.;  LEDERER-WOODS Claudia;  LERENDEGUI-MARCO J.;  LO MEO S.;  LONSDALE S.;  MACINA D.;  MANNA A;  MARTÍNEZ T.;  MASI A.;  MASSIMI C.;  MASTINU P.;  MASTROMARCO M.;  MATTEUCCI F.;  MAUGERI Emilio;  MENDOZA E.;  MENGONI A.;  MICHALOPOULOU V.;  MILAZZO P.M.;  MINGRONE F.;  MUCCIOLA Riccardo;  MUSUMARRA A.;  NEGRET A.;  NOLTE R.;  OGÁLLAR F.;  OPREA A.;  PATRONIS N.;  PAVLIK A.;  PERKOWSKI J.;  PIERSANTI L.;  PORRAS I.;  PRAENA J.;  QUESADA J.;  RADECK D.;  RAMOS DOVAL D.;  REIFARTH R.;  ROCHMAN D.;  RUBBIA C.;  SABATE-GILARTE M;  SAXENA A.;  SCHILLEBEECKX Peter;  SCHUMANN D.;  SMITH A. G.;  SOSNIN N. V.;  STAMATOPOULOS A.;  TAGLIENTE G.;  TAIN J.L.;  TALIP Z.;  TARIFENO-SALDIVIA A.;  TASSAN-GOT L.;  TORRES-SÁNCHEZ P.;  TSINGANIS A.;  ULRICH J.;  URLASS S.;  VALENTA S.;  VANNINI G.;  VARIALE V.;  VAZ P.;  VENTURA A.;  VESCOVI D.;  VLACHOUDIS V.;  VLASTOU R.;  WALLNER A.;  WOODS P. J.;  WYNANTS Ruud;  WRIGHT T. J.;  ZUGEC P.; 

2020-08-26

ELSEVIER SCIENCE BV

JRC120825

0370-2693 (online),   

https://publications.jrc.ec.europa.eu/repository/handle/JRC120825,   

10.1016/j.physletb.2020.135405 (online),