Measurement of the 140Ce(n,γ) cross section at n_TOF and its astrophysical implications for the Chemical Evolution of the Universe

140Ce(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron-sensitivity detectors. The measured Maxwellian Averaged Cross Section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s-process contribution to the galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars.

AMADUCCI S;  COLONNA N.;  COSENTINO Luigi;  CRISTALLO S.;  FINOCCHIARO Paolo;  KRTICKA M.;  MASSIMI C.;  MASTROMARCO M.;  MAZZONE A.;  MAUGERI E.;  MENGONI A.;  ROEDERER I.U.;  STRANIERO O.;  VALENTA S.;  VESCOVI D.;  ABERLE O.;  ALCAYNE V.;  ANDRZEJEWSKI J.;  AUDOUIN L.;  BABIANO-SUAREZ V.;  BACAK M.;  BARBAGALLO M;  BENNETT S;  BERTHOUMIEUX E.;  BILLOWES J.;  BOSNAR D.;  BROWN A.;  BUSSO M.;  CAAMANO M.;  CABALLERO-ONTANAYA L.;  CALVINO F.;  CALVIANI M.;  CANO-OTT D.;  CASANOVAS A.;  CERUTTI F.;  CHIAVERI E.;  CORTÉS G. P.;  CORTES-GIRALDO M. A.;  DAMONE L.;  DAVIES P.;  DIAKAKI M.;  DIETZ M.;  DOMINGO-PARDO C.;  DRESSLER R.;  DUCASSE Q;  DUPONT E.;  DURAN I.;  ELEME Z.;  FERNÁNDEZ-DOMÍNGEZ B.;  FERRARI A.;  FURMAN V.;  GÖBEL K.;  GARG R.;  GAWLIK-RAMIEGA A.;  GILARDONI S.;  GONCALVES I. F.;  GONZÁLEZ-ROMERO E.;  GUERRERO C.;  GUNSING F.;  HARADA H.;  HEINITZ S.;  HEYSE Jan;  JENKINS D. G.;  JUNGHANS A. R.;  KAEPPELER F.;  KADI Y.;  KIMURA A.;  KNAPOVA I.;  KOKKORIS M.;  KOPATCH Y.;  KURTULGIL D.;  LADARESCU I.;  LEDERER-WOODS Claudia;  LEEB H.;  LERENDEGUI-MARCO J.;  LONSDALE S.;  MACINA D.;  MANNA A.;  MARTÍNEZ T.;  MASI A.;  MASTINU P.;  MENDOZA E.;  MICHALOPOULOU V.;  MILAZZO P.M.;  MINGRONE F.;  MORENO-SOTO J.;  MUSUMARRA A.;  NEGRET A.;  NOLTE R.;  OGALLAR F.;  OPREA A.;  PATRONIS N.;  PAVLIK A.;  PERKOWSKI J.;  PETRONE C.;  PERSANTI L.;  PIROVANO Elisa;  PORRAS I.;  PRAENA J.;  QUESADA J.;  RAMOS-DOVAL D.;  RAUSCHER T.;  REIFARTH R.;  ROCHMAN D.;  RUBBIA C.;  SABATE-GILARTE M;  SAXENA A.;  SCHILLEBEECKX Peter;  SCHUMANN D.;  SEKHAR A. G.;  SMITH A. G.;  SOSNIN N. V.;  SPRUNG P.;  STAMATOPOULOS A.;  TAGLIENTE G.;  TAIN J.L.;  TARIFENO-SALDIVIA A.;  TASSAN-GOT L.;  THOMAS Th.;  TORRES-SÁNCHEZ P.;  TSINGANIS A.;  ULRICH J.;  URLASS S.;  VANNINI G.;  VARIALE V.;  VAZ P.;  VENTURA A.;  VLACHOUDIS V.;  VLASTOU R.;  WALLNER A.;  WOODS P. J.;  WRIGHT T. J.;  ZUGEC P.; 

2024-07-16

AMERICAN PHYSICAL SOC

JRC137188

0031-9007 (online),   

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.122701,    https://publications.jrc.ec.europa.eu/repository/handle/JRC137188,   

10.1103/PhysRevLett.132.122701 (online),