6533b854fe1ef96bd12aed56

RESEARCH PRODUCT

r Process (n, γ) Rate Constraints from the γ Emission of Neutron Unbound States in β decay

J. L. TainV. GuadillaE. ValenciaA. AlgoraA.-a. Zakari-issoufouS. RiceJ. AgramuntJuha ÄYstöL. BatistM. BowryJ. A. BrizV. M. BuiR. Caballero-folchD. Cano-ottA. CucoanesViki-veikko ElomaaTommi EronenE. EstevezM. EstienneM. FallotG. F. FarrellyL. M. FraileE. GaniogluA. R. GarciaW. GelletlyB. Gómez-hornillosDmitry GorelovV. GorlychevJani HakalaAri JokinenM. D. JordanAnu KankainenVeli KolhinenF. G. KondevJukka KoponenM. LeboisL. Le MeurT. MartínezP. MasonE. MendozaM. MonserrateA. Montaner-pizáIain MooreE. NacherS. E. A. OrrigoHeikki PenttiläZs. PodolyákIlkka PohjalainenA. PortaP. ReganJuuso ReinikainenMikael ReponenSami Rinta-antilaJuho RissanenB. RubioKari RytkönenT. ShibaVolker SonnenscheinA. A. SonzogniV. VediaAnnika VossJ. N. Wilson

subject

total absorption gamma-ray spectroscopybeta-delayed neutron emittersAstrophysics::High Energy Astrophysical Phenomenar-processutron-capture ratesNuclear Experiment

description

Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of γγ emission from neutron-unbound states populated in the ββ-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission a constraint on the (n, γγ) cross section for highly unstable neutron-rich nuclei can be deduced. A surprisingly large γγ branching was observed for a number of isotopes which might indicate the need to increase by a large factor the Hauser-Feshbach (n, γγ) cross-section estimates that impact on r process abundance calculations. peerReviewed

yearjournalcountryeditionlanguage
2017-01-01
http://urn.fi/URN:NBN:fi:jyu-201801081103